CHERVON (HK) LIMITED Patent applications |
Patent application number | Title | Published |
20150183036 | SAW BLADE CLAMPING DEVICE AND THE OPERATION METHOD THEREOF - A saw blade clamping device has a first clamping device for clamping a first working element and a second clamping device for clamping a second clamping element, wherein the first clamping device and the second clamping device are parallel to each other and mounted to a transmission controlling mechanism. The two clamping devices can be controlled by the transmission control mechanism to can not only clamp a single saw blade but to allow for replacement of the single saw blade by double saw blades without changing the clamping system, which enables the replacement of the saw blade to be more convenient and quick. | 07-02-2015 |
20140370354 | BATTERY PACK HAVING HEAT DISSIPATING SYSTEM - A battery pack includes a phase change material, which implements temperature management of the battery pack by virtue of the heat dissipation action of the phase change material. The battery pack includes a plurality of battery cells, at least one of which is partially provided with a phase change material and brackets for supporting the plurality of battery cells. The phase change material is disposed at the maximum heat dissipating region of the battery cell, and the maximum heat dissipating region is a region partially extending from an intermediate position of the outer surface of the battery cell towards a positive pole end. | 12-18-2014 |
20140352992 | ROTATION SPEED CONTROL METHOD FOR IMPACT TYPE FASTENING TOOLS - A rotation speed control method for impact type fastening tools has a presetting step and a dynamic control step. The presetting step includes setting a plurality of working positions, and setting a PWM signal with a larger duty cycle as a driving signal in a period after energization so that a motor can rotate at a higher speed and improve work efficiency. When a main controller judges, according to a feedback means, that the operation enters an impact phase and torsion control is needed to reduce rotation speed, the main controller makes adjustment by driving the motor with a PWM signal with a lower duty cycle corresponding to a working position currently set by the user. The control method improves work efficiency, and meet the user's need of driving a fastener with a higher rotation speed at an early stage of operation. In the torsion control phase, the method according to the present invention can automatically use a suitable torsion to drive the fastener to better meet the user's needs in operation and enable the user to obtain an excellent experience of use. | 12-04-2014 |
20140352680 | TABLE TYPE CUTTER AND CUTTING WORKTABLE THEREOF - A cutting worktable includes a worktable body have a distal side located away from a cutting tool and a proximal side located adjacent to the cutting tool. The cutting worktable further includes a support frame assembly disposed at the proximal side of the worktable body and used to lift an object to be cut so that the object to be cut is placed on a top surface of the worktable body in an inclined posture. The support frame assembly includes a support roller for contacting the object to be cut and the worktable body is provided with a limiting structure for abutting against the object to be cut and limiting its position. The object to be cut can thus be inclined via the support frame assembly and fixed by the limiting structure. The limiting structure can be in the form of a plurality of placement grooves to achieve placement of the object to be cut at different angles relative to the cutting tool and worktable. | 12-04-2014 |
20140338939 | ELECTRIC TOOL AND CONTROLLING METHOD THEREOF - An electric tool has a motor, an implementing member driven by the motor for driving a working element and a controlling circuit for controlling the electric tool. The controlling circuit includes a current detecting module for detecting the current flowing through the motor; a microprocessor for memorizing and storing a current value; an user interface module for an user to select working modes, and the working modes at least comprising a learning mode for recording the current value after the implementing member has driven the working element and a constant torque mode for driving other working elements having the same size based on the recorded current value; and a driving module for driving or stopping the torque output of the motor. The electric tool can achieve the function of electronic clutch so as to drive screws having the same size with substantially the same effect. The present disclosure also discloses a controlling method by using the above controlling circuit. | 11-20-2014 |
20140332242 | METHOD FOR CONTROLLING TORQUE OUTPUT OF DC ELECTRIC TOOL - A method for controlling a torque output of a DC electric tool, includes presetting torque levels and voltage ranges corresponding to the torque levels, detecting the current output voltage of a battery and determining the voltage range in which the current output voltage is located, determining whether or not the current voltage range matches the preset torque level or not, and if the current voltage range does not match the preset torque level providing a warning that the torque output cannot reach the preset torque level and calculating and displaying a maximum torque level corresponding to the actual torque output value and, if the current voltage range does match the preset torque level, calculating the current actual torque output value and keeping a PWM modulation value constant if the torque output value conforms to the preset torque level or increasing the PWM modulation value for compensation if the torque output value does not conform to the preset torque level. | 11-13-2014 |
20140312843 | BATTERY PACK COOLING AND CHARGING DEVICE AND METHOD - A battery pack cooling and charging device includes a charging module for a battery pack, a cooling fan, a power source module and a cooling fan control module. The cooling fan control module is capable of controlling the cooling fan for cooling and is connected with the cooling fan. During the charging operation, a rotational speed of the cooling fan for cooling the battery pack and a charging module is changed by detecting parameters such as fan operation time, a battery pack internal resistance, a charging module temperature, and a battery pack voltage. The rotational speed of the cooling fan is reasonably adjusted, thus noise of the cooling fan is reduced and energy consumption is reduced according to different phases of the charging process by regarding one parameter or combinations of parameters as conditions for changing the rotational speed of the fan. | 10-23-2014 |
20140296020 | ELECTRIC TOOL - An electric tool has a housing, a motor disposed in the housing, an output shaft, a first planetary gear transmission mechanism, having a power input member, disposed between the motor and the output shaft, and a locking mechanism, having a power output member. The locking mechanism has a locked state and an unlocked state. When torsion is transmitted from the motor to the output shaft, the locking mechanism is in the unlocked state, and the output shaft is driven by the motor to rotate to perform electric operation. When the output shaft reversely receives a force, the locking mechanism is in the locked state, and the power input member of the first planetary gear transmission member is locked to perform manual operation, and the locking mechanism is connected to the output shaft via the first planetary gear transmission mechanism, and the power output member of the locking mechanism is non-rotatably connected to the power input member of the first planetary gear transmission member. The electric tool can also memorize the torsion input by the operator upon manual operation and operate according to the torsion. | 10-02-2014 |
20140260835 | THROUGH-HOLE TYPE POWER RATCHET WRENCH - A through-hole type power ratchet wrench includes a socket bracket, a swingable member, a ratchet socket, first and second pawls, and first and second resilient elements. The swingable member is disposed in the socket bracket and adjacent to an outer surface of the ratchet socket. The pawls are swingably fixed on the swingable member. The pawls, biased by the respective resilient elements, tend to engage with the outer surface of the ratchet socket. The wrench also includes a limiting member configured to isolate one of the first and second pawls from the ratchet socket. The limiting member is formed with an opening adapted for allowing one of the pawls to pass therethrough, and the limiting member is moveable about the ratchet socket between first and second positions. The opening of the limiting member faces towards the first pawl and second pawls when at the first and second positions, respectively. | 09-18-2014 |
20140234130 | HANDHELD BLOWER - A handheld blower includes a housing having an air inlet and a duct assembly mounted in front of the air inlet, the duct assembly including a duct connected with the housing, a motor and a fan mounted in the duct, a battery, and a blowpipe connected to the housing by the duct assembly, the blowpipe defining a central axis in the length direction, and a handle arranged above the housing and the battery. The handle includes a gripping portion arranged on opposite sides of a plane in which the gravity center of the blower is located, and the plane is parallel to a central axis of the blowpipe and substantially perpendicular to a working ground. The gravity center of the handheld blower is adjacent to the gripping portion which enhances the handling comfort and reduces operator fatigue during long times of operation. | 08-21-2014 |
20140230181 | HANDHELD BLOWER - A handheld blower includes a housing, the housing including an air inlet and a duct assembly, the duct assembly including a duct, a motor and a fan mounted in the duct, a battery, a handle, and a blowpipe which defines a central axis. Along the direction of the central axis, the area of the flowing cross-section of an air passage at the rear end of the fan adjacent to the air inlet is larger than that of the flowing cross-section of an air outlet of the blowpipe, and the rate between the area of the flow cross-section of the air outlet of the blowpipe and the area of the flow cross-section of the flow-through area at the position of the fan is greater than or equal to 0.8. | 08-21-2014 |
20140183828 | ACCESSORY CLAMPING MECHANISM AND POWER TOOL HAVING THE SAME - An accessory clamping mechanism for clamping an accessory to a working mandrel of a power tool wherein the working mandrel has a mandrel flange and a first longitudinal axis. The accessory clamping mechanism includes: at least one clamping member; a thrust member for supporting the clamping member; an elastic member by which the thrust member is biased towards a clamped position; a driving assembly for forcing the thrust member and the clamping member to move along the first longitudinal axis, the driving assembly comprising a driving member moved between a first position in which the accessory is in the clamped position and a second position in which the accessory is in a released position, the thrust member and the clamping member being driven by the driving member to move along the first longitudinal axis; and a motion converting member for driving the clamping member to move in a direction different from the first longitudinal axis. | 07-03-2014 |
20140182420 | ELECTRICAL WRENCH - An electrical wrench includes a housing, a power member, a reversing mechanism, a support transmission assembly, an opening gear, a main control assembly and a restoring assembly. The housing includes having two projections, for example shaped as claws, arranged oppositely to cooperatively define an entrance. The power member, the reversing mechanism, the support transmission assembly and the opening gear are cooperatively coupled to one another and accommodated in the housing. The opening gear includes an outer teeth portion, an opening and a driving portion in communication with the opening, a tubular member for engaging with a fastener positioned in cooperation with the opening gear through the entrance. The restoring assembly includes an identifying portion, a sensor for sensing the position of the identifying portion, a control circuit board, a restoring switch and a restoring switch operator. | 07-03-2014 |
20140165788 | ELECTRICAL WRENCH - An electrical wrench includes a motor, a transmission mechanism, a ratchet assembly and a controlling member coupled to each other. The transmission mechanism is configured to provide idle travels. The ratchet assembly receives the rotating torque output by the transmission mechanism and drives the ratchet therein in a single direction. The controlling member is connected with the motor and controls the motor to rotate in the opposite direction when detecting the motor is stalled. The electrical wrench thus provides impacting action by electrical control and simplifies the mechanical structure of the tool, which not only reduces the manufacturing cost, but also prolongs the working life of the tool. | 06-19-2014 |
20140157961 | IMPACT RATCHET WRENCH - An impact ratchet wrench includes a motor assembly, a transmission assembly, an impact assembly and a ratchet assembly which are arranged in a housing and connected with each other in turn. The motor assembly drives the transmission assembly and the transmission assembly includes a cylindrical gear train for providing an output at a first rotating speed or a second rotating speed lower than the first rotating speed. The impact assembly includes a striking member that is driven by the transmission assembly and an output member. The striking member of the impact assembly provides an increasing torque to the output member intermittently to drive the ratchet assembly. | 06-12-2014 |
20140150271 | CHAIN SAW - A chain saw includes a housing, a cutting chain, a chain wheel, a guide plate cooperating with the chain wheel to support and guide the cutting chain, a cover plate cooperating with the housing, and a chain wheel tensioning mechanism. The chain wheel tensioning mechanism is wholly combined and disposed movably in the housing so that during the assembly procedure, positions and states of parts such as the cutting chain, the guide plate, the tensioning nut, and the chain wheel can be observed and so that the positioning is accurate and the operation is simple and quick. A distance between the guide plate and the chain wheel is adjusted to tension the cutting chain by use of a tensioning handwheel that is connected to a transmission member where the transmission member causes the tensioning nut fixed on the guide plate to move. | 06-05-2014 |
20140144662 | ACCESSORY CLAMPING MECHANISM AND POWER TOOL HAVING THE SAME - An accessory clamping mechanism for clamping an accessory to a working mandrel having a mandrel flange. The accessory clamping mechanism includes: a fastening flange; a driving device for forcing the fastening flange to move between a released position in which the accessory can be removed between the mandrel flange and the fastening flange and a clamped position in which the accessory is clamped between the mandrel flange and the fastening flange; a pushing member connected to the fastening flange; and a first elastic member by which the fastening flange is biased towards the clamped position; wherein the pushing member is arranged on one side of the working mandrel. | 05-29-2014 |
20140102064 | LAWNCARE APPARATUS - A lawncare apparatus includes a main body, multiple wheels supporting the main body, a cutting blade disposed in the main body, a motor driving the cutting blade, and an operating arm connected to the first end of the main body. The distance in the horizontal direction between the axial central line of the cylindrical gripping portion of the operating arm and the axes of the elongated handle of the main body along the length direction is less than 5 cm. Because of the structure mate relationship between the operating arm and the cylindrical gripping portion, the operator feels more comfortable during the transporting process, the volume of lawncare apparatus during transporting is reduced and the convenience of transporting is improved. | 04-17-2014 |
20140102063 | LAWNMOWER WITH OPERATION PROTECTION AND SAFETY SWITCH MECHANISM THEREOF - A lawnmower with operation protection and a safety switch mechanism. The safety switch mechanism include: an inner pipe and a pipe sleeve slidably connected with and enclosing the inner pipe, a safety switch with a contact tab mounted inside the pipe sleeve, a trigger configured to trigger the safety switch by contacting the contact tab when the inner pipe slides, and an elastomer configured to drive the trigger to keep from contacting with the contact tab. All of the safety switch, the trigger and the elastomer are arranged on the same side of the inner pipe. The safety switch mechanism functions to disable the motor upon accidental proximity of the operator to the cutter body to thereby lower the possibility of an accident. | 04-17-2014 |
20140078742 | LASER LINE GENERATING DEVICE - A laser line generating device includes a conical prism, a light-emitting unit for projecting light onto the conical prism, a housing for receiving the light-emitting unit and permitting the light emitted by the light-emitting unit to pass there through, and translucent columns disposed between the housing and the conical prism for connecting the housing and the conical prism, wherein the apex of the conical prism faces towards the light-emitting unit. | 03-20-2014 |
20140010585 | ELECTRICAL TOOL WITH BATTERY PACK EJECTION ASSIST MECHANISM - The present invention provides an electrical tool with batter pack ejection assist mechanism. The electrical tool includes a housing receiving a motor and a transmission mechanism, a tool accessory driven by the motor for the operation, a battery pack slidably mounted to the housing for providing power and a locking mechanism for locking the battery pack after being mounted. The electrical tool further includes an ejecting assembly for assisting in the ejection of the battery pack when the locking mechanism unlocks the battery pack, the ejecting assembly includes a contacting member for contacting and ejecting the battery pack and a driving member for driving the contacting member for ejecting the battery pack. The contacting member is movably connected to the housing, and the driving member is arranged in the housing and contacts the contacting member. | 01-09-2014 |
20130321825 | LASER DISTANCE MEASURING DEVICE - A laser distance measuring device includes a laser module, a receiving lens, and a photoelectric conversion device. The receiving lens includes a first curved surface and a second curved surface having a curvature different from that of the first curved surface. The second curved surface is used to converge part of reflected beams passing through the receiving lens onto a focal plane so as to form a continuous optical band and the continuous optical band gathers on the light receiving surface of the photoelectric conversion device. | 12-05-2013 |
20130292892 | QUICK CLAMPING DEVICE ADAPTED FOR WORKTABLE - A quick clamp is adapted for a worktable, and includes a slide bar for clamping or loosening a workpiece by the sliding thereof, and a fixing rod fixedly connected to the worktable. The quick clamping device further includes a pushing mechanism for pushing the slide bar towards the worktable, and a locking mechanism for locking the slide bar at a position. At least some advantages of the present quick clamp include simplicity in structure and cost-effectiveness, and the assurance of a quick clamping and quick release functionality. The present quick clamp also provides simple operation and reliable clamping, while improving convenience and comfort of operation. | 11-07-2013 |
20130278916 | LASER RANGEFINDER AND CONDENSER LENS THEREOF FOR RECEIVING A LIGHT RAY - A condenser lens suitable for a laser rangefinder includes a lens body wherein the lens body is formed with or has attached thereto a deviation correction area that is located on the light emitting side thereof for correcting focus deviation upon reception of light scattered by a close range object. A center of the body is located inside the deviation correction area of the lens. The deviation correction area may include one or more deviation correction zones. | 10-24-2013 |
20130270476 | COMPOSITE PHASE CHANGE MATERIAL - A composite phase change material and the method for forming the material is disclosed herein. thereof, especially a composite phase change material for lithium battery cooling, comprising polyethylene glycol, silica vehicle and composite flame retardant comprising graphite and polymer, wherein the weight ratio of the graphite and polymer is approximately 1:2. The composite phase change material according to the invention has a good stability and a thermal conductivity, a small corrosivity, a high phase transition enthalpy of 150-350 J/g, and a morphological stability during phase change. Moreover, addition of high thermal conductivity material and composite flame retardant ensures good thermal conductivity and excellent flame retardant effect of the phase change material. | 10-17-2013 |
20130269965 | ELECTRICAL TOOL - An electrical tool has a main body housing a motor and an operating member and a battery pack has an electrical cell and housing for providing electricity to the motor. The main body is provided with a first locking assembly configured to move in a reciprocating manner along a first direction and the battery pack is provided with a second locking assembly configured to move in reciprocating manner along a second direction for cooperating with the first locking assembly to provide a locking or unlocking condition. The first direction is perpendicular to the second direction. | 10-17-2013 |
20130263712 | MITER SAW - A miter saw has a base, a working table arranged above the base and rotatably connected with the base around a pivoting axis, and a cutting assembly having a cutting blade arranged above the working table. A first locking assembly is arranged between the base and the working table for positioning the base and the working table at a certain angle. The first locking assembly includes an operating button rotating about a first pivoting shaft to force the first locking assembly to be in a locked state or an unlocked state, the working table has a shift position hole having a locked type shift position and a released type shift position for locking the rotation positions of the operating button, and the first pivoting shaft is parallel to the cutting blade. | 10-10-2013 |
20130228353 | TORSION-ADJUSTABLE IMPACT WRENCH - A torsion-adjustable impact wrench, includes a housing, a powering unit including an impact mechanism configured to generate an intermittently increasing torque, an adjusting unit configured to manually set a first torsion value and generate a corresponding a first torsion signal, a detecting unit configured to detect a rotational speed of the powering unit and generate a corresponding first rotational speed signal, and a control unit configured to generate a control signal for controlling the output of the rotational speed of the powering unit. The control unit generates a second rotational speed signal according to the first torsion signal outputted by the adjusting unit, compares the first rotational speed signal with the second rotational speed signal, and generates a control signal enabling the rotational speed of the powering unit to approach the second rotational speed. | 09-05-2013 |
20130212996 | HANDLE MECHANISM WITH MULTIPLE STOP LOCATIONS AND A LAWN MOWER INCLUDING THE HANDLE MECHANISM - A handle mechanism with multiple stop locations and a lawn mower including the handle mechanism includes a handle and a location shifting element with multiple stop locations, the handle being provided with a locking mechanism that is automatically clamped with one of the multiple of stop locations of the location shifting element for fixing or adjusting the handle. A lawn mower, including the handle mechanism, includes a lawn mower body, the handle rotatably connected with the lawn mower body by the handle rotating shaft. The locking mechanism and the location shifting element are equipped with stop locations can be automatically locked, therefore, the operator can adjust the stop locations of the lawn mower conveniently. The locking at the stop locations is accurate and reliable, which largely improves portability, flexibility, and reliability of use. | 08-22-2013 |
20130199049 | ELECTRIC CIRCULAR SAW - An electric circular saw includes a housing, a switch trigger arranged on the housing, a switch controlling rod for limiting the travel range of the switch trigger, a base plate, a depth support arranged on the base plate and a connecting rod for limiting the travel range of the depth support. The electric circular saw further includes an movable control member having a driving portion for driving the first connecting rod and a limiting portion for limiting the switch controlling rod, and the moving distance from the driving portion to a contact surface between the driving portion and the first connecting rod is larger than or equal to the moving distance from the limiting portion to a contact surface between the limiting portion and the switch controlling rod. | 08-08-2013 |
20130186663 | MULTI-TOOL FOR FASTENERS - The multi-tool for fasteners includes a housing, a power device, a transmission device coupled to the power device, an output device coupled to the transmission device, and a switching device that can be switched between at least two operating modes. In a first operating mode, the output device moves in a reciprocating manner without rotation along an axial direction. In a second operating mode, the output device rotates with an intermittently increasing torque about a circumferential direction. The switching device may include a limiting member and the limiting member can be moved between a first position and a second position. Further, in the first position the output device is in the first operating mode, and in the second position the output device is in the second operating mode. | 07-25-2013 |
20130168115 | ELECTRIC WEEDER - The invention provides an electric weeder, including a housing, a driving device, a working head, and a removable handle. The driving device is disposed in a housing, and including an axis line. The working head is connected to the axis line and driven by the driving device; the removable handle moves relative to the working head and the housing, and wherein on end of the removing handle is movably connected to the housing, the other end includes a removing plate, and the removing plate includes a through portion being passed through by the working head. The electric weeder of the present invention can exactly weed the lawn with little damage, the overall structure of the machine is more simple to effectively reduce the overall length of the machine; the removable handle can remove the weeds automatically to lower the work intensity and increase the weeding efficiency. | 07-04-2013 |
20130168114 | ELECTRIC WEEDER - The present invention discloses an electric weeder. The present invention provides an electric weeder, including a working head, a driving device, a connecting rod, a main handle, a removing plate, and a movable handle. The driving device is used for driving the working head to rotate; The connecting rod is used for receiving the driving device, and the working head is connected to a first end of the connecting rod; The main handle is arranged on a second end of the connecting rod opposite to the first end; The removing plate is movable relative to the working head; The movable handle includes a sleeve slidably sleeved on the connecting rod and a pushing bar. The present electric weeder can effectively enhance the efficiency of weeding and can effectively reduce the shake of the working head during the operation and enhance the comfort of operation. | 07-04-2013 |
20130145632 | PALM JIG SAW - A palm jig saw includes a motor, a transmission mechanism connected to an output shaft of the motor, and an implementing element which is driven by the transmission mechanism and which movement trajectory is in the same plane called a swing plane. The palm jig saw further includes a switch locking structure including a push button assembly and a press button assembly, wherein a movement direction of the push button assembly is generally parallel to the swing plane, and a movement direction of the press button assembly is generally perpendicular to the swing plane. | 06-13-2013 |
20130145631 | PALM ELECTRIC TOOL - A palm electric tool includes a housing adapted for palm gripping, a base connected to the housing for contacting with a workpiece and supporting the palm electric tool, a motor with an output shaft arranged within the housing. The output shaft is substantially parallel to the base. A transmission mechanism is connected to the output shaft of the motor which includes a slide bar. The slide bar is capable of being moved in a direction perpendicular to the output of the motor, a blade is connected to the slide bar which is positioned substantially perpendicular to the output of the motor and the base. A battery pack for powering the motor is inserted into the housing. An inserting direction of the battery pack is substantially parallel to the output shaft of the motor. The battery pack is positioned between the motor and the base and partially overlapped with the motor in a direction perpendicular to the base. | 06-13-2013 |
20130133501 | CUTTING ELEMENT FOR OSCILLATING POWER TOOL - A cutting element includes a main body extending in a longitudinal direction, a mounting hole and a cutting portion for acting on a piece to be processed. The main body defines an axis extending in the longitudinal direction, the mounting hole is arranged at a first end of the main body for connection to the output shaft of an oscillating power tool and the cutting portion is arranged at a second end of the main body and has a first cutting portion and a second cutting portion. The second cutting portion protrudes from the first cutting portion laterally. The first cutting portion is adapted to cut the piece in a feeding direction and the second cutting portion is adapted to cut the piece in a direction perpendicular to the feeding direction. | 05-30-2013 |
20130100718 | POWER STARTING CIRCUIT - A power starting circuit used in a DC power supply circuit has a double-pole, double-throw switch electrically connected to a positive pole of a DC power supply and controls a conducting state of the circuit. A first capacitor provides a voltage signal for a first switch circuit and controls the conducting state of the first switch circuit in a continuous charging and discharging process. The first switch circuit controls the conducting state of the DC power supply circuit. A maintaining signal input end provides a maintaining signal for the first capacitor. The power starting circuit can achieve an over discharge protection function for the control circuit. Moreover, when the switch is turned on, it can automatically switch the circuit off so as to save power if the electrical product does not need to continue to work. | 04-25-2013 |
20130092006 | SAW BLADE CLAMPING DEVICE AND THE OPERATION METHOD THEREOF - A saw blade clamping device has a first clamping device for clamping a first working element and a second clamping device for clamping a second clamping element, wherein the first clamping device and the second clamping device are parallel to each other and mounted to a transmission controlling mechanism. The two clamping devices can be controlled by the transmission control mechanism to can not only clamp a single saw blade but to allow for replacement of the single saw blade by double saw blades without changing the clamping system, which enables the replacement of the saw blade to be more convenient and quick. | 04-18-2013 |
20130057845 | CONTROL AND SWITCH DEVICE FOR INNER LIGHT PATH OF LASER DISTANCE METER - A control and switch device for an inner light path of a meter distance meter includes: a generating device for emitting a polarized light; a liquid crystal box for deflecting the polarized light emitted from the generating device; a transparent medium positioned near the Brewster's angle formed by an emergent light emitted from the liquid crystal box; and a polarizer positioned in the direction of an emergent light emitted from the transparent medium. | 03-07-2013 |
20130055574 | POWER TOOL WITH REPLACEABLE BLADE - A power tool includes a replaceable blade, a fixing device for clamping and securing the blade, a control circuit for controlling a driving device, and a main switch electrically connected to the control circuit. A safety device prevents the blade from moving when the fixing device is opened. | 03-07-2013 |
20130019482 | ELECTRIC PRUNER - An electric pruner includes a housing, a motor accommodated within the housing, a transmission mechanism, a movable blade, and a fixed blade extending from the front end of the housing. The fixed blade is fixedly mounted on the housing, and the movable blade is rotatably connected to the fixed blade via a shaft and driven by the motor via the transmission mechanism. A locking device manually operable by the user is arranged n the shaft for locking the movable blade, the locking device being switchable between a first position where the movable blade is locked to stay connected with the transmission mechanism and a second position where the movable blade is releasable from the transmission mechanism. Thus, the replacement of the movable blade is very simple and convenient. | 01-24-2013 |
20130019481 | ELECTRIC PRUNER - An electric pruner includes a housing, a motor accommodated within the housing, a transmission mechanism, a movable blade, and a fixed blade extending from the front end of the housing. The fixed blade is fixedly mounted on the housing, and the movable blade is rotatably connected to the fixed blade via a shaft and driven by the motor via the transmission mechanism. A groove is formed on the movable blade and comprises a first and a second groove portion, the size of the first portion being greater than that of the second portion. The shaft comprises a first mating portion and a second mating portion, and is movable between a first position and a second releasing the movable blade when the shaft is in the second position. Thus, the replacement of the movable blade is very simple and convenient. | 01-24-2013 |
20120326637 | MULTIFUNCTIONAL ELECTRIC TOOL - A multifunctional electric tool has a housing, a motor arranged in the housing, a transmission device driven by the motor, a speed controlling device. At least two output shafts which have different dimensions are to be used with the tool wherein the output shaft is used to control the activation of the speed controlling device. The rotational speed of the electric tool may thus be automatically adjusted to match with the rotational speed of the accessory installed on the output shaft. | 12-27-2012 |
20120311876 | CUTTING ELEMENT - A cutting element adapted for use with an oscillating power tool having an output shaft that makes an oscillating movement about its own axis. The cutting element has a longitudinally extending main body, a mounting hole and a cutting portion for acting upon a workpiece to be processed. The mounting hole is disposed at a first end of the main body and is adapted to be connected to the output shaft of the oscillating power tool. The cutting portion is provided at a second end of the main body and includes a first cutting portion and a second cutting portion. The first cutting portion has a first cutting blade, the second cutting portion has a second cutting blade, and a distance from the second cutting blade to the axis of the output shaft is greater than a distance from the first cutting blade to the axis of the output shaft. | 12-13-2012 |
20120292864 | POWER TOOL - A power tool has a driving shaft for driving a working element and a clamping device for clamping the working element. The clamping device has a clamping position in which the working element may be fixed relative to the driving shaft and a release position in which the working element can be removed from the driving shaft. An operating member is coupled to the clamping device for moving the clamping device between positions. The clamping device also has a rotating position in which the working element can be rotated by an angle relative to the driving shaft and the operating member has an operating position that corresponds to the rotating position. | 11-22-2012 |
20120261152 | AUTO HAMMER - An auto hammer includes a housing supporting a striking device, a motor arranged in the housing, a transmission mechanism driven by the motor and an impact assembly. The impact assembly includes an impact wheel and an intermediate shaft for supporting the impact wheel where an impact portion of the impact wheel is provided for impacting on a striking shaft of the striking device. The intermediate shaft is supported on a first supporting member and a second supporting member which are located at the opposite sides of the impact assembly. The axis of the intermediate shaft is substantially perpendicular to the output axis of the motor, and the proportion of the axial length of the intermediate shaft to the diameter of the motor is in a range of approximately 1 to 1.4. | 10-18-2012 |
20120247797 | AUTO HAMMER - An auto hammer includes a motor arranged in a housing, a striking device arranged in a nozzle portion of the housing and a transmission mechanism for converting the rotating motion of the motor into the striking motion for the striking device. The transmission mechanism includes a striking assembly for exerting a striking motion to the striking device, the striking assembly includes a rotational driving member and a rotational striking member enclosing the rotational driving member, and the rotational striking member is provided with at least one striking portion for striking and contacting the striking device. The auto hammer has a gripping portion suitable for palm gripping which is arranged on a back side of the housing opposite to the striking device where the motor is arranged on the same side as the striking assembly relative to the axis of the reciprocating linear motion of a striking shaft of the striking device. | 10-04-2012 |
20120246942 | POWER PRUNER - A power pruner includes a housing, a motor arranged in the housing, a transmission device connected to the motor, a pair of blades and a trigger which is arranged on the housing and used to control the motor. The pair of blades include a fixed blade and a movable blade which is driven by the motor to swing back and forth. The power pruner additionally includes a stroke switch which is arranged on the housing and has at least two statuses wherein the movable blade has a first stroke when the stroke switch is in a first status and a second stroke different from the first stroke when the stroke switch is in a second status. | 10-04-2012 |
20120227994 | CORDLESS TOOL SYSTEM - A tool discharges one battery pack and a charger simultaneously charges another battery pack to provide for continuous and circular operation of the tool. The ratio of the discharging time to the charging time is approximately 25:35. | 09-13-2012 |
20120142484 | POWER TOOL WITH AN AUTOMATIC SPEED REGULATING DEVICE - A power tool is provided with a device for automatically switching transmission output, including at least one stage of transmission part having a sun gear, a planetary gear carrier, and a gear ring for transmission, a sensing system having a sensing component for sensing variation of operating condition, and a control device cooperated with the sensing system for controlling the transmission output of the transmission part. A first transmission output is generated when the sun gear, the planetary gear carrier, and the gear ring in the same stage are in a first transmission state, and a second transmission output is generated when the variation of operating condition received by the sensing component reaches a predetermined value and then being fed back to the control device by the sensing system. | 06-07-2012 |
20120139196 | POWER TOOL - A power tool has a driving shaft driving a working element, a fastening piece fastening the working element to the driving shaft having a projecting shaft insertable into the driving shaft, a locking assembly locking the projecting shaft in the driving shaft having a locking member wherein the locking member has a locking position for locking the projecting shaft with the driving shaft and a loosening position for loosening the projecting shaft with the driving shaft. At the locking position, the fastening piece is pressed towards an end portion of the driving shaft by an elastic component. The locking assembly further includes a movable member arranged outside of the driving shaft, the movable member having a first portion and a second portion which can be directly or indirectly mated with the locking member wherein a radial distance of the first portion relative to a shaft center of the driving shaft is unequal to that of the second portion relative to the shaft center of the driving shaft. | 06-07-2012 |
20120125171 | BORER FOR AN OSCILLATING TOOL - A borer for forming holes in a workpiece has a fastening portion for mounting on an oscillating tool and a cutter which is connected with the fastening portion. The cutter is driven in a vibrating manner by the oscillating tool such that a feeding direction of the cutter is substantially parallel to a longitudinal axis about which the borer is driven in a vibrating manner. | 05-24-2012 |
20120118121 | MITER SAW WITH WORKING LAMP - A miter saw, comprising a base, a worktable for carrying a work piece to be cut, a cutting head pivotally connected to the worktable and positioned in a working position and a stopping position, and a self-hung type working lamp coupled to the cutting head. In one example, a main handle has a rotating pivot on which the self-hung type working lamp is rotatably arranged. The self-hung type working lamp may comprise at least one light source for consistent irradiation of the cutting area upon being powered. The present device further enables the working lamp to rotate with the up and down movement of the cutting head to substantially irradiate the same cutting area to keep the stability of the lighting. It can also achieve the control of the irradiating area with a simple structure and without affecting the overall appearance of the machine. | 05-17-2012 |
20120086177 | POWER TOOL HAVING A CLAMPING DEVICE FOR A WORKING ELEMENT - The present disclosure provides a power tool having a clamping device for a working element. The power tool includes an output shaft, a fastening piece having a flange portion for clamping the working element and a protruding shaft substantially perpendicular to the flange portion. A locking assembly comprising a locking member having a first position in which the protruding shaft is locked and a second position in which the protruding shaft is loosened is provided, wherein a pressing member can press the working element between the pressing member and the flange portion when the locking member is in the first position. The power tool can fasten the working element to the output shaft in a simple and reliable manner without the necessary use of such auxiliary tools as a spanner etc. and can achieve a stronger clamping force even under impact conditions. | 04-12-2012 |
20120074877 | OVER-TEMPERATURE PROTECTION CIRCUIT FOR POWER DEVICES - An over-temperature protection circuit for a direct current (DC) electric tool includes a current detecting circuit electrically coupled to a battery pack, a power device control circuit electrically coupled to an electric motor of the DC electric tool and a power device for controlling the power state of the circuit. A computation control circuit controls the power supply of the motor according to the circuit current value detected by the current detecting circuit. When the electric motor is not in a speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset first current value. When the electric motor is in the speed control state, the allowable current passing through the over-temperature protection circuit of the DC electric tool cannot exceed a preset second current value less than the first current value. | 03-29-2012 |
20120074657 | HAND-HELD POWER TOOL WITH A QUICK-CLAMPING DEVICE FOR A WORKING ELEMENT - A hand-held power tool with a quick-clamping device for a working element includes a working mandrel for driving the working element, a fastening member for fastening the working element onto the end of the working mandrel, and a locking assembly. The fastening member includes a clamping shaft insertable into the working mandrel and a moving assembly for making the fastening member moveable between a releasing position and a clamping position. The locking assembly includes a floatable clamping component and the clamping component and the clamping shaft are provided with corresponding toothed portions such that engagement and disengagement therebetween is selectively achieved by the relative rotation of the toothed portions. | 03-29-2012 |
20120061443 | POWER TOOL WITH AN AUTOMATIC NAIL-FEEDING MECHANISM - An automatic nail-feeding mechanism for a power tool having a striking assembly having a striking rod movable in a linear reciprocating manner feeds a nail to be struck to a front end of the striking rod. The automatic nail-feeding mechanism has a driving part movable between a first position and a second position in a direction of a reciprocating motion of the striking rod and a nail-storing element is provided with nails arranged at a fixed pitch, the nail-storing element being fed a distance of the fixed pitch towards the striking rod when the driving part moves from the first position to the second position and then from the second position to the first position in a stroke of the reciprocating motion thereof. | 03-15-2012 |
20120060665 | GUIDING MECHANISM FOR AN ELECTRIC TOOL - A guiding mechanism for an electric tool includes at least two guiding elements at least one of which has a first end portion having at least one protruding portion extending outwards therefrom and the other of which has a second end portion having at least one groove therein which may be engaged with the protruding portion. The groove has a cut-out and the protruding portion has an elastic clamping portion which may be engaged with the cut-out. | 03-15-2012 |
20120055309 | VISE CLAMPING TOOL FOR TABLE-TYPE CIRCULAR SAWING MACHINE - A vise clamping tool for a table-type circular sawing machine includes a rotating arm assembly connected to a supporting shaft. The rotating arm assembly has a first rotating arm connected to the supporting shaft and a second rotating arm provided with a clamping component. The second rotating arm is pivotally connected to the first rotating arm around a first pivoting axis oriented along the horizontal direction. | 03-08-2012 |
20120055033 | STRING TRIMMER - A string trimmer has a blade storage mechanism wherein the blade storage mechanism has a cavity arranged on the body of the string trimmer for storing a blade. | 03-08-2012 |
20120055032 | HEDGE TRIMMER - A hedge trimmer having improved operational balance includes a housing with a front handle and a main handle, a cutting assembly, a motor assembly, a transmission assembly and a switch device arranged on the housing for controlling the start of the motor assembly. The cutting assembly is connected to the housing, the motor assembly and the transmission assembly are arranged in the housing, and the transmission assembly for transmitting the rotation of the motor assembly to the cutting assembly is located between the motor assembly and the cutting assembly. The main handle is located between the motor assembly and the transmission assembly and a main part of the main handle is located above a motor output shaft in the motor assembly. | 03-08-2012 |
20120037387 | ELECTRIC TOOL - An electric tool includes a gripping portion, a working portion rotatably connected to the gripping portion about an axis, an output shaft moving in a reciprocating manner and accommodated in the working portion, and a gear box accommodated in the gripping portion for driving the output shaft. The gear box has an opening so that the output shaft is moveable from one end to the other end of the opening when the working portion is rotated relative to the gripping portion about the axis. A leakage-preventing device, such as a bushing, is arranged at the opening so that the lubricating grease can be avoided from leaking. | 02-16-2012 |
20120031248 | PULL-ROD LOCKING DEVICE FOR A MITER SAW - An operating element of a locking device is used to switch a locking element into and out of engagement with a pull rod of a miter saw to respectively lock and unlock moveability of the pull rod. | 02-09-2012 |
20120017447 | HAND-HELD POWER TOOL FOR PRUNING AND CUTTING VEGETATION AND A METHOD FOR REPLACING BLADES THEREOF - A hand-held power tool for pruning and cutting vegetation and a method for replacing blades thereof. The hand-held power tool has a main body and a work head detachably mounted on the main body. The main body has a housing, a motor placed in the housing, and a first gear transmissively connected with the motor. The work head has a blade assembly and a second gear. The second gear engages with the first gear and is provided with a eccentric member connected with the blade assembly. By arranging one portion of the transmission mechanism on the work head, especially the second gear used for providing the eccentrically rotary output on the work head, the transmission mechanism is directly connected with the blade assembly. When the work head needs to be mounted on the main body, it only needs the second gear to be placed on the mandrel arranged on the main body where it will engage with the first gear. This avoids the need to align and mate the eccentric member arranged on the second gear with the upper and lower blades one by one thereby providing an assembly process that is simple and time-saving while providing a connection that is reliable. | 01-26-2012 |
20120006879 | ELECTRIC HAMMER - An electric hammer has a housing having a nozzle portion, a motor and a transmission mechanism arranged in the housing, a striking device, coupled to the motor and transmission mechanism, for moving in a reciprocating manner in the nozzle portion, and a clamping device mounted to the nozzle portion and at least partially extending out of the nozzle portion. The clamping device includes an outer sleeve, an inner sleeve arranged in the outer sleeve, and at least two clamping members arranged on the inner sleeve. The inner sleeve has a first position and a second position with respect to the outer sleeve and the distance between the two clamping members in the first position is less than the distance between the two clamping members in the second position to thereby allow a nail to be released halfway, i.e., when partially struck into a workpiece, in a simple manner. | 01-12-2012 |
20110316242 | WORKING COMPONENT FOR MATING WITH MULTIPLE SHAFT ENDS - A working component for mating with multiple shaft ends includes a body portion and a clamping portion which is connected to the body portion and suitable for mounting the working component to the shaft ends. The body portion has a work piece processing area for acting on the work piece to be processed and the clamping portion has a mounting hole with a longitudinal axis Y. The clamping portion includes a support portion and a mating portion which is provided with a plurality of projections which extend in a radial direction vertical to the longitudinal axis Y and which are distributed alternately. | 12-29-2011 |
20110316241 | WORKING COMPONENT FOR MATING WITH MULTIPLE SHAFT ENDS - A working component for mating with multiple shaft ends includes a body portion and a clamping portion which is connected to the body portion and suitable for mounting the working component to the shaft ends. The body portion has a work piece processing area for acting on the work piece to be processed and the clamping portion has a mounting hole with a longitudinal axis Y. The clamping portion includes a support portion and a mating portion which are overlapped along the direction of the longitudinal axis Y. | 12-29-2011 |
20110302899 | LAWN CARE APPARATUS - An apparatus, such as a lawnmower, includes a cutting device and a chassis for carrying the cutting device. The chassis includes a chassis body, at least one front wheel and at least one rear wheel mounted on the chassis body. A handle is fixedly connected to the chassis and includes a handle body positioned above and behind the cutting device. The apparatus provides a stable support deck by having a body portion of the support deck extend rearwards and upwards from the front wheel to the handle body. | 12-15-2011 |
20110302895 | LAWN CARE APPARATUS - An apparatus, such as a lawnmower, includes a cutting device and a chassis for carrying the cutting device. The chassis includes a chassis body, at least one front wheel and at least one rear wheel mounted on the chassis body. A handle is fixedly connected to the chassis and includes a handle body positioned above and behind the cutting device. The apparatus provides a stable support deck by having a body portion of the support deck extend rearwards and upwards from the front wheel to the handle body. | 12-15-2011 |
20110302894 | LAWN CARE APPARATUS - An apparatus, such as a lawnmower, includes a cutting device and a chassis for carrying the cutting device. The chassis includes a chassis body, at least one front wheel and at least one rear wheel mounted on the chassis body. A handle is fixedly connected to the chassis and includes a handle body positioned above and behind the cutting device. The apparatus provides a stable support deck by having a body portion of the support deck extend rearwards and upwards from the front wheel to the handle body. | 12-15-2011 |
20110302893 | LAWN CARE APPARATUS - An apparatus, such as a lawnmower, includes a cutting device and a chassis for carrying the cutting device. The chassis includes a chassis body, at least one front wheel and at least one rear wheel mounted on the chassis body. A handle is fixedly connected to the chassis and includes a handle body positioned above and behind the cutting device. The apparatus provides a stable support deck by having a body portion of the support deck extend rearwards and upwards from the front wheel to the handle body. | 12-15-2011 |
20110291368 | ADAPTOR FOR ADAPTING A WORKING ELEMENT TO AN END OF A POWER TOOL SHAFT - An adaptor for adapting a working element to an end of a power tool shaft. The adaptor includes a central hole passing through the adaptor and has a longitudinal axis, a driving end facing the end of the shaft, and a tool end facing the working element and having a protruding portion, wherein the driving end is provided with grooves, the grooves and bosses formed between the grooves are alternately arranged around the circumference of the driving end, and the bosses have side faces each facing the central hole and located on a plane passing through an edge of a regular polygon and parallel with the longitudinal axis. The adaptor can thus be used to adapt different kinds of working elements to various kinds of driving shafts having different shapes of shaft end. | 12-01-2011 |
20110233257 | NAILER DEVICE - A nailer device has a housing containing a motor and a transmission mechanism. The housing has a nozzle portion with a striking rod for striking a nail arranged therein, the striking rod being moved in a reciprocating manner. A rotating shaft is mounted in the housing and the rotating shaft is coupled to the output shaft of the motor through the transmission mechanism. An impact member surrounds the rotating shaft and is moved with the rotating shaft. Corresponding slots are formed on the rotating shaft and the impact member respectively and mate with each other with an engagement member being contained in the corresponding slots. | 09-29-2011 |
20110196516 | SAFETY SYSTEM FOR A GARAGE DOOR - A safety system for a garage door movable along a door frame is used to detect an obstacle. The safety system includes a motor device for opening and closing the garage door, a control circuit for controlling the motor to open and close the door, a light emitting device for emitting a light, a light receiving device in communication with the control circuit for receiving the light, wherein the light emitting device and the light receiving device are to be mounted on one side of the door frame, and an optical reflecting device for mounting on the other side of the door frame opposite to the light emitting device and the light receiving device whereby the light receiving device will receive light emitted from the light emitting device and reflected by the optical reflecting device. An optical element is to be mounted near the optical reflecting device for changing the polarization direction of the reflected light, and another optical element is to be mounted near the light receiving device to allow the light in only one polarization direction to pass there through. | 08-11-2011 |
20110195643 | POWER TOOL WITH A SHIELD - A power tool includes a housing accommodating a motor therein, a bearing base having a lower surface and an upper end that is connected to the housing, an output shaft that is mounted in the bearing base and protrudes out of the lower surface of the bearing base, a shield that is movably connected with the bearing base, and a locking mechanism for locking the shield relative to the bearing base. The locking mechanism further includes a locking element arranged on the shield and a stop member and the bearing base is formed with a hollow chamber within which the stop member is arranged. | 08-11-2011 |
20110174859 | QUICK-CLAMPING MECHANISM FOR ELECTRIC HAMMER - A quick-clamping mechanism for an electric hammer for clamping fasteners such as nails includes a biasing assembly for making the clamping assembly movable between a closed position and an opened position. The clamping assembly includes at least two clamping claws, and each of the clamping claws is pivotally connected to a pivot shaft and the two clamping claws can be pivotally closed and opened, and the closure of the two clamping claws is realized by any one of or the combination of a torsion spring and a magnet. The two clamping claws are pivotally connected to the pivot shaft and fasteners, such as nails and the like, can be clamped or released by the two clamping claws rotating relative to the pivot shaft, so that the quick-clamping mechanism has a simple structure and is easily implemented. The two clamping claws can be automatically closed, after a nail is loaded, by providing a torsion spring or a magnet on the two clamping claws, so that the quick-clamping mechanism can be operated expediently and the nail clamped securely. | 07-21-2011 |