| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 030383000 | With guide bar for cutting span | 72 |
| 20080276469 | MANUALLY GUIDED IMPLEMENT - A manually guided implement, such as a power saw, a cut-off machine, or the like, having a drive motor for driving a tool of the implement. The drive motor has a drive shaft that is rotatably driven about an axis of rotation. The implement has a handle on which is disposed at least one control handle for the drive motor. Formed between the handle and the drive motor is a vibration space that is spanned by at least one anti-vibration element, at least one of which includes a coil spring, the longitudinal axis of which is disposed approximately perpendicular to a longitudinal plane of the implement. The vibration space is spanned by at least one connecting element, the longitudinal axis of which is inclined relative to a transverse plane of the implement that is disposed perpendicular to the longitudinal plane. | 11-13-2008 |
| 20090000130 | Chain Saw - A chain saw has a body in which a stratified scavenging 2-cycle engine for driving a saw chain is laterally housed and a top handle provided above the body. In other words, by laterally disposing the engine, an air port can be installed upward to a cylinder, and an air quantity adjusting device for feeding scavenging air to the air port and the carburetor can be well housed in the top handle. Accordingly, there is no need to separately prepare a space for installing the air quantity adjusting device, so that miniaturization can be achieved. | 01-01-2009 |
| 20090077815 | Motor Chain Saw - A motor chain saw has a housing, a motor arranged in the housing, a drive pinion driven by the motor, and a guide bar connected to the housing. A saw chain is driven in circulation about the guide bar by the drive pinion. A lateral panel is arranged between the housing and an attachment section of the guide bar. The guide bar and the lateral panel each have a distance relative to the drive pinion upstream and downstream of the drive pinion when viewed in a circulating direction of the saw chain. The lateral panel has a first guide that guides the saw chain at a level of rivets of the saw chain, wherein the first guide extends approximately parallel to the plane of the guide bar. | 03-26-2009 |
| 20090133269 | Chain saw guide bar attachment used to simplify the cutting of whippy branches and the like - A fingerlike apparatus that attaches to a chain saw guide bar. The apparatus is metal. A proximal end portion of the apparatus is continuously joined to a distal end portion. The distal end portion is positioned at an acute angle to the proximal end portion and away from the plane of the chain saw guide bar. The distal end portion is provided with a surface area away from the cutting plane of a chain saw upon which small limbs, branches or the like may be rested and/or manipulated by an operator before making a cut. | 05-28-2009 |
| 20100037472 | Chainsaw guide bar and method of making - A chainsaw has a saw chain connected so as to be driven by the motor and a guide bar for guiding and supporting the saw chain as it revolves around the periphery of the guide bar. The guide bar has a channel formed by alternatively offset tabs, wherein each tab is offset from its immediate two adjacent tabs such that there is an open segment in the channel opposite each tab. There is a first set of tabs on a first side of the guide bar and a second set of tabs on the opposite side of the guide bar, wherein the alternatively offset tabs keep the cutting chain centered in the channel formed between the first set of tabs and the second set of tabs. | 02-18-2010 |
| 20100083513 | STATIC COOLING ELECTRIC CHAIN SAW AND METHOD USED TO ACHIEVE SAID COOLING - Electric chain saw with static cooling features a cutting chain fitted so as to turn around a drive sprocket and a guide bar of oblong shape, and an electric motor effecting the drive of this chain, through the intermediary of the sprocket. The electric drive motor drive of the cutting chain is a brushless direct current motor enclosed in a housing formed by at least two components and made of a light metallic alloy, with one surface of the housing being in contact with the drive motor drive, to provide static cooling. | 04-08-2010 |
| 20100218388 | CHAINSAW THROTTLE AND BRAKE MECHANISMS - Chainsaws are provided, each having a brake band disposed about a drum that rotates during advancement of the saw chain about the saw bar. An end of the brake band is biased to a position that draws the brake band tight about the drum to prevent advancement of the saw chain, and the throttle trigger of the chainsaw is associated with this biased end to push the band against the bias and release the drum when the throttle trigger is squeezed to drive the elements of the chainsaw that serve to advance the saw chain. Also provided are new concepts for associating gasing and braking elements with the throttle trigger. | 09-02-2010 |
| 20100257743 | Systems and Methods for a Chainsaw Safety Device - Systems and methods for a chainsaw safety device are described. In some embodiments, a method comprises activating a chainsaw, receiving a first acceleration value associated with acceleration of the chainsaw, comparing the first acceleration value to a predetermined acceleration threshold, and deactivating the chainsaw based on the comparison. | 10-14-2010 |
| 20100275451 | ATTACHING ARRANGEMENT FOR HAND-HELD MOTOR-DRIVEN TOOLS - The invention relates to an arrangement for attaching a bar ( | 11-04-2010 |
| 20110005088 | PORTABLE ELECTRIC CHAINSAW - A motor-driven portable chainsaw of the sort that includes a power source enclosed in a casing and a cutter device comprising a toothed chain and a chain guide. The saw being characterized in that the power source is a brushless direct-current electric motor controlled and switched electronically, with a rotor with magnets. A handle for holding and operating the saw is located underneath the motor assembly which supports the chain guide and includes said direct-current electric motor. | 01-13-2011 |
| 20110061246 | COASTING BRAKE ARRANGEMENT FOR A POWER TOOL - A chainsaw having a brake arrangement comprising: a kickback brake drum ( | 03-17-2011 |
| 20110072671 | CHAIN SAW - According to an aspect of the present invention, there is provided a chain saw including: an engine having: a crankcase; a cylinder attached to the crankcase; and a piston configured to reciprocate in the cylinder; a housing configured to accommodate the engine; and a guide bar, around which a saw chain is to be wound so as to be rotated by the engine, the guide bar being attached to the housing, wherein the engine has two surfaces substantially parallel to an axis direction of a crankshaft, the two surfaces being covered with and fixed to the housing, and wherein the engine is fixed to the housing with a fixing member at a side where the guide bar is attached to the housing. | 03-31-2011 |
| 20110162219 | HANDHELD ELECTRIC POWER TOOL - A handheld electric power tool comprises a main body supporting a tool, a motor housed in the main body and configured to drive the tool, a battery interface disposed in a back portion of the main body and configured to detachably receive a battery pack, and a top grip disposed on a top portion of the main body. In a planar view of the main body, a center axis of the top grip extends in front and back direction and a center of gravity of the battery pack attached to the battery interface is located at one side of a straight line passing through the center axis of the top grip. | 07-07-2011 |
| 20110179652 | Chipper chain and motor-driven chain saw having a chipper chain - The invention relates to a chipper chain ( | 07-28-2011 |
| 20110192039 | Weight-reduced guide bar of solid material - A guide bar ( | 08-11-2011 |
| 20110197458 | Power Tool with an Indicator - A power tool is provided with an indicator with a light source for generating a marking. A holding device is secured on the power tool by positive fit. The indicator is releasably secured on the holding device, wherein the holding device is secured to a grip pipe. The holding device has a geometry that is matched to the geometry of the grip pipe such that the holding device is securable in only one position on the grip pipe. | 08-18-2011 |
| 20110232110 | Chain Saw - A chain saw includes a guide bar ( | 09-29-2011 |
| 20120005905 | Vegetation Trimmer - A vegetation pruning device includes a cutting element; a guide bar for supporting the cutting element, the guide bar having a guide bar plane, the guide bar being pivotable in the guide bar plane about a fixed axis; a motor having a motor shaft for rotatably driving the cutting element; a motor housing for receiving the motor; a guiding mechanism connected to the motor housing, the guiding mechanism having a longitudinal axis; a handle assembly operable to move linearly along the longitudinal axis; and a transmission device for connecting the handle assembly to the guide bar through, the transmission device converting a linearly movement of the handle assembly to a pivoting movement of the guide bar, the cutting element thereby approaching or withdrawing from a workpiece to be sawn. | 01-12-2012 |
| 20120036725 | KICKBACK DETECTION METHOD AND APPARATUS - In various embodiments, a cutting tool such as a chainsaw may include a cutting member that is movable by an engine, one or more sensors configured to detect one or more of acceleration in a direction parallel to one or more axes of the cutting tool and rotational velocity about one or more axes of the cutting tool, and a microprocessor configured to cause movement of the cutting member to stop in response to receiving one or more signals from the one or more sensors. In various embodiments, a method may include receiving, by a microprocessor of a chainsaw, a signal from a gyroscope configured to detect rotational velocity about one or more axes of the cutting tool, and actuating, by the microprocessor, a braking system of the chainsaw to stop movement of a cutting chain around a perimeter of a guide bar in response to the signal. | 02-16-2012 |
| 20120055034 | CHAINSAW ARRANGEMENT - A chainsaw ( | 03-08-2012 |
| 20120102766 | CHAINSAW ARRANGEMENT - A chainsaw, comprising: a guide bar, a cutting chain and a driving unit arranged to drive the cutting chain around the guide bar. The guide bar defines a first longitudinal axis extending along a centre of the guide bar. The chainsaw further comprising a handle section for carrying and operating the chainsaw, wherein the handle section includes a control portion disposed on the upper side of the chainsaw. The control portion in turn includes a throttle lever for controlling the speed of the driving unit and the control portion has a left and a right side. The control portion defines a second longitudinal axis substantially extending along an upper side of at least a part of the control portion. An angle, A, between the first and the second longitudinal axes is between 14° and 45°. | 05-03-2012 |
| 20120204431 | Handheld Working Tool - The present invention concerns a handheld working tool comprising a motor part ( | 08-16-2012 |
| 20130318802 | Power tool with sprocket cover - A power tool has guide bar guiding a saw chain. A drive motor with a sprocket drives the saw chain. A sprocket compartment of the power tool housing has a peripheral wall adjacent to a roof of the saw chain and an ejection opening for cut material. The guide bar has a longitudinal center axis intersecting the saw chain in first and second deflection areas at the sprocket and the nose of the guide bar. The sprocket compartment has an exit opening where the saw chain exits. The peripheral wall of the sprocket compartment and the roof of the saw chain are disposed at a spacing relative to each other that, when the saw chain is standing still, is less than approximately 18 mm at least across 50% of a stretch from the first deflection area to the exit opening and across an entire saw chain width. | 12-05-2013 |
| 20140047722 | CHAIN SAW - A chain saw has a drive shaft which drives the saw chain, an electric motor which imparts a rotational force to the drive shaft, a main body housing which incorporates the electric motor, a battery which is detachably attached to the main body housing, a battery guard which supports a bottom surface of the battery, and a hook which is provided in a hook accommodating portion on a bottom surface side of the battery guard so as to be freely drawn out to the rear. A pillar-like portion is formed within the battery guard in a position lying further forwards than the hook accommodating portion, and bent-back portions of the hook are brought into engagement with the pillar-like portion. | 02-20-2014 |
| 20140047723 | MOUNTED RECIPROCAL TRACKING GUIDE FOR POWERED CUTTING TOOLS - An attachment for a cutting tool includes a tracking guide configured to interface with an object to be cut. The tracking guide may be inserted into a groove formed by the cutting tool in an already cut portion of the object such that positioning of the tracking guide in the groove guides further progress of the cutting tool. | 02-20-2014 |
| 20140109416 | ATTACHING ARRANGEMENT FOR HAND-HELD MOTOR-DRIVEN TOOLS - The invention relates to an arrangement for attaching a bar of a hand-held motor driven tool to a body of the tool, the arrangement including: at least one bolt, having a first part, securely arranged to the body, and a second part extending from the body, the second part having an engagement portion for engaging a nut; a cover portion adapted to bear against a bar such that the bar is arranged between the cover portion and the body; and at least one nut, captively attached to the cover portion. The nut is adapted to engage the engagement portion of the bolt for securing a bar between the cover portion and the body, the nut having a rotation axis. Thereby, an attachment arrangement is achieved that facilitates changing of bars when the nut used in the attachment arrangement is captively arranged to the cover portion. | 04-24-2014 |
| 20140123504 | MACHINE TOOL SEPARATING DEVICE - A machine tool separating device, in particular a handheld machine separating device, includes at least one cutting strand and at least one guide unit. The cutting strand, viewed along a direction running at least substantially perpendicular to a cutting plane of the cutting strand, has a maximum dimension less than 4 mm. | 05-08-2014 |
| 20140173918 | Machine Tool Separating Device - A machine tool separating device, in particular on a handheld machine tool separating device, includes at least one cutting strand and at least one guide unit, which form a self-contained system. The guide unit comprises at least one main guide unit element and/or at least one cutting strand holding unit, wherein at least the main guide unit element and/or the cutting strand holding unit has at least two guide surfaces, which have different alignments in relation to one another and which, when mounted, are provided to guide the cutting strand. | 06-26-2014 |
| 20140215838 | Battery Powered Rear Handle Chain Saw - A battery-powered chain saw is provided which chain saw comprises a housing ( | 08-07-2014 |
| 20140250701 | GUIDE BAR HAVING A CARBON FIBER REINFORCED PLASTIC INSERT - A guide bar for a chain saw has an elongate main body of steel. The main body has flat sides and upper and lower peripheries defining a guide groove for a saw chain. An elongate window is formed in the main body between the peripheries and is filled with an insert made of a fiber composite material made up of resin and fibers. The fibers are in the direction of the longitudinal axis of the main body. The insert includes a plurality of fiber layers that are bonded with resin. A central layer is formed from a fiber layer and the fibers thereof are at an angle to the longitudinal axis. Two fiber layers having fibers oriented in the direction of the longitudinal axis of the main body are on both sides of the central layer. The inner fiber layers are covered outwardly by a woven fabric. | 09-11-2014 |
| 20140259700 | APPARATUS, METHOD, AND SYSTEM FOR ORIENTING A SAW CHAIN LINK ON A SPROCKET - Embodiments herein provide a modified pitch sprocket to provide an orientation of a saw chain link, such as a cutter link or drive link, with respect to the direction of travel of the link, as it traverses the sprocket that is different than the orientation of the link as it traverses a straight portion of the guide bar. In some embodiments, the modified pitch sprocket may orient the cutter link to provide radial extension for a depth gauge of the cutter link relative to a cutting element of the cutter link. This may facilitate shaping of the depth gauge and/or cutting element, such as by a sharpening element, as the cutter link traverses the sprocket. | 09-18-2014 |
| 20140345149 | CHAINSAW - A chainsaw having improved cutting workability is provided. A chainsaw is used to cut an object to be worked by a saw chain. A chainsaw main body is provided with an electric motor and a sprocket, and a guide bar around which the saw chain is wound is provided on the chainsaw main body. The guide bar is attached to the chainsaw main body by a screw member serving as an attaching member. A load sensor detects whether or not the guide bar is attached to the chainsaw main body. Rotation of the saw chain is prohibited based upon a signal from the load sensor when the guide bar is not attached to the chainsaw main body. | 11-27-2014 |
| 20150013173 | Method for Producing at Least One Cutting Unit Segment of a Cutting Unit - A method for producing at least one cutting strand segment of a cutting strand comprises punching at least one cutting strand segment out of a band material. The at least one cutting strand segment includes at least one cutting element and at least one cutter carrier element having at least one connecting element. | 01-15-2015 |
| 20150068048 | STRUCTURE FOR PREVENTING FALLING OF FASTENING NUT OF PORTABLE POWER WORK MACHINE, AND FASTENING NUT ANCHOR MEMBER - Provided is a structure for preventing the falling of a fastening nut of a portable power work machine, the structure reliably preventing loss of the nut and containing assembly cost, manufacturing cost, and component cost while reducing the possibility of damage, failure or the like and increasing the nut fastening and loosening workability and durability. A nut anchor member comprises a single bent wire or bar of elastically deformable material, and includes: a split ring-shaped portion externally retained in a circular groove provided at the outer periphery of a nut; a pair of left and right leg-like piece portions continuous with both ends of the split ring-shaped portion; and hook piece portions continuous with lower portions of the leg-like piece portions. A cover includes a locking portion that locks the hook piece portions so as to prevent the nut and the nut anchor member from falling from the cover when the nut is detached from the bolt. | 03-12-2015 |
| 20150089820 | METHOD AND GUIDE BAR CLAMPING ARRANGEMENT RELATED TO A MOTOR SAW - Method and an arrangement within a motor saw, having a guide bar, a drive motor unit including with its chassis a drive motor, whose rotatable shaft supports a drive disc, around which a portion of an endless saw chain runs, the saw chain also being adapted with its remaining portions to run along and form the guide bar arrangement with its guide bar and along tracks allotted to side edges directed away from each other. An anchored support plate, a displaceable clamping plate and with an interrelated arrangement in an inactivated position, the end area of the guide bar within a first mode displaces the end area in a direction perpendicular from the plane and from the support plate, and within a second mode displacing the end area and its guide bar in a direction along the plane allotted to the guide bar and out of the inactivated interrelated arrangement. | 04-02-2015 |
| 20150290830 | Tool Coupling Device - A tool coupling device is configured to hold a machine tool cutting device. In particular, the tool coupling device is configured to hold a machine tool cutting device configured as a closed system, having at least one cutting train clamping unit for generating a cutting train clamping force and having at least one tool-holding unit comprising at least one movably mounted tool-holder element. The tool coupling device includes at least one movement-coupling unit by which the tool-holder element can be coupled with a clamping element for a movement of the clamping element of the cutting train clamping unit. | 10-15-2015 |
| 20150314470 | ARRANGEMENT FOR THE PASSIVE CAPTURE OF A BROKEN SAW CHAIN - The invention concerns an arrangement to capture passively a broken saw chain of a chain saw with a guide bar that is arranged such that it can pivot, comprising a stationary screen that forms part of a sawing box and that covers a rear part of the saw. In order to achieve a cheap and efficient protection there is arranged between an end surface of the screen and the guide bar an energy-absorbing brake member that is sufficiently elastic or flexible to receive the kinetic energy from a broken saw chain, to direct kinetic energy away from the chain and to regain its normal form after it has suffered an impact from and been deformed by the chain. | 11-05-2015 |
| 20150321375 | Closure Device - A closure device, in particular a tool-holder closure device, includes at least one movably mounted closure element and at least one securing unit. The securing unit includes at least one movably mounted securing element configured to secure the closure element in at least one position thereof. The closure device further includes at least one stop unit which has at least one stop element. The stop element, depending on at least one position of the closure element, is configured to stop the securing element at least largely against a movement relative to the closure element. | 11-12-2015 |
| 20150321376 | Power Cutting Tool - A power cutting tool includes at least one cutting strand, and at least one guide unit that is configured to guide the cutting strand. The power cutting tool further includes at least one coding unit which has at least one coding element that is configured to encode at least one coupling interface of the guide unit. | 11-12-2015 |
| 20150321377 | CHAINSAW - A chainsaw in which a remaining amount of chain oil to be supplied to a saw chain can be easily checked is provided. In a chainsaw | 11-12-2015 |
| 20150321378 | Separating Device for a Machine Tool - A separating device for a machine tool includes at least one cutting strand and at least one guide unit configured to guide the cutting strand. The guide unit forms a closed system together with the cutting strand. The separating device further includes at least one cutting strand tensioning unit that is positioned on the guide unit, and that is configured to compensate for at least one of play and tolerance in the cutting strand. | 11-12-2015 |
| 20150336288 | PRESSURE RELEASING CLOSURE FOR AN OIL RESERVOIR - A chainsaw ( | 11-26-2015 |
| 20150375416 | CHAINSAW - A chainsaw includes a body housing, an elongated guide bar projecting forward from the body housing, a saw-chain mounted on the periphery of the guide bar for rotation, an electric motor mounted within the body housing for rotating, and a top handle provided on an upper portion of the body housing above the guide bar and extending in a fore-and-aft direction. A plurality of rechargeable battery packs is mounted on the body housing as a source of power supply for the electric motor. The battery packs are mounted to the body housing in such a manner that a center of gravity of the chainsaw observed from the back side is positioned in a two times extent of lateral width of a gripe portion of the top handle at both sides of a vertical centerline of the gripe portion. | 12-31-2015 |
| 20160045964 | CHAIN SAW - A chain saw ( | 02-18-2016 |
| 20160052158 | GUIDE BAR RETENTION SYSTEMS AND TECHNIQUES - Disclosed herein are systems and methods for securing a guide bar to a chainsaw body. In some embodiments, a chainsaw may include a mounting stud, a side cover and the retention member. The mounting stud may extend away from a bar mount pad of a chainsaw body and be dimensioned to be received in a slot of a guide bar when the guide bar is mounted to the chainsaw body. The side cover may be selectively mountable to the chainsaw body in a closed configuration in which the mounting stud is disposed between the bar mount pad and the side cover. The retention member may be coupled to the chainsaw body and positioned to retain the guide bar against the bar mount pad when the mounting stud is received in the slot of the guide bar. Other embodiments may be disclosed and/or claimed. | 02-25-2016 |
| 20160107326 | HANDHELD WORK APPARATUS - A handheld work apparatus has a drive motor which drives a tool of the work apparatus. A lubricating arrangement is provided for the tool. The lubricating arrangement includes a lubricant piece that is solid at 20° C. The work apparatus has a melting chamber into which the lubricant piece projects and which is connected to the tool via at least one lubricant channel. The melting chamber is delimited at least partially by a heat conducting element which is heated during operation of the work apparatus. | 04-21-2016 |
| 20160144530 | Power Saw System and Cable Assembly for a Power Saw - A power saw system has a power saw with housing; guide bar; and saw chain driven about the guide bar by an electric drive motor. A battery is arranged outside of the housing. A power cable is connected with its first end through an electrical connection to the battery and with the second end to the drive motor to supply the drive motor with power. An elastic securing element is connected by a fastening element to the housing. A connecting device connects by a mechanical connection the securing element to an operator of the power saw. The connecting device has an overload protection separating the mechanical connection between securing element and operator when a maximum pulling force is surpassed. Securing element and power cable form a cable assembly. A pull-out force for separating the electrical connection is smaller than the maximum pulling force. | 05-26-2016 |
| 030384000 | Including nondriving guide pulley | 1 |
| 20100229406 | CHAINSAW CARVING GUIDE BAR - A chainsaw guide bar adapted for carving and shaping a workpiece. In one embodiment, a guide bar includes a mounting end, a distal cutting end, and an intermediate portion offset from the longitudinal axis defined the mounting end. The guide bar may further include an idler sprocket mechanism operable to keep the saw chain engaged with the outer peripheral edge of the guide bar. In other embodiments, the guide bar includes an axially elongated recess providing an unsupported span of chain which is movable between undeflected and deflected positions when carving a workpiece. | 09-16-2010 |
| 030386000 | Including means to adjust guide bar relative to its support | 19 |
| 20090007439 | AUTO CHAIN TENSIONER - The invention relates to an auto tensioner of a chain saw. A spiral guide groove ( | 01-08-2009 |
| 20090119934 | AUTO CHAIN TENSIONER - The invention relates to an auto tensioner of a chain saw. A spiral guide groove ( | 05-14-2009 |
| 20090241353 | Toolless Apparatus for Guide Bar for Chain Saw - A chain saw is provided in which the tension of a cutting chain extending along a periphery of the guide bar may be adjusted without use of a tool. A locking knob is provided which engages with a cover of the chain saw. Protrusions of the locking knob fit within corresponding notches of the cover. The shape of the protrusions and the notches allow rotation of the locking knob in a first direction but not a second direction. Upon disengaging the locking knob from the cover, the guide bar may move relative to the engine housing and clutch cover to tighten the cutting chain extending along a periphery of the guide bar. | 10-01-2009 |
| 20100088905 | CHAIN SAW EQUIPPED WITH A DEVICE FOR ADJUSTING THE TIGHTNESS OF THE CUTTING CHAIN - The chain saw of the present invention includes a cutting device having a cutting chain mounted to turn around a drive sprocket and a guide bar which can be immobilized on a body by a jamming device and moved in two directions tending to move it closer to or further away from the drive sprocket relaxing the tension of the chain or ensuring its tension, respectively. The chain saw features a pushing device tending to automatically move the guide bar away from the drive sprocket, when the jamming device is loosened. The pushing device is formed by a slide against the rear end of which rests the rear end of the guide bar and an elastic component, preferably constituted by a helical spring resting, through the intermediary of its opposite ends against a fixed element of the body and against a surface of the front end of the slide. | 04-15-2010 |
| 20100146801 | TIGHTENING DEVICE WITH SWIVELLING HANDLING ARM AND APPLIANCE INCLUDING SUCH A DEVICE - Tightening device of the screw-nut type includes a tightening member, which can be rotated, and a rotary wrench for this tightening member, equipped with a handling arm. The wrench and the tightening member are joined by a connecting device in such a way that the wrench can swivel in relation to the tightening member around a swivel axis substantially perpendicular to the screwing axis of the tightening member. Thus, it can be placed in a rest position substantially perpendicular to the screwing axis and can rotate the tightening member around the screwing axis or rotated freely in relation to the tightening member around the screwing axis, over a range of angular clearance (a) of at least 170°. | 06-17-2010 |
| 20100293797 | Chainsaw tensioning device - A chainsaw has a cam lever and cam assembly that can be used to adjust the tension of a guide bar in the chainsaw. Once the tension of the guide bar has been lessened, the guide bar can be moved back and forth by using a chain-tightening knob and tightening mechanism. The movement of the guide bar causes the chain to tighten or loosen on the guide bar. | 11-25-2010 |
| 20110167650 | TORQUE-LIMITED CHAIN TENSIONING FOR POWER TOOLS - A chainsaw ( | 07-14-2011 |
| 20110179653 | CHAIN SAW - A chain saw an operator can easily strain a saw chain is provided. In the chain saw | 07-28-2011 |
| 20110308096 | CHAIN SAW - A chain saw includes a housing, a sprocket wheel which is provided in the housing for driving a saw chain, and a chain guide for guiding the movement of the saw chain. The chain guide extends out longitudinally from the housing and is movable longitudinally relative to the housing. The chain saw includes a chain tensioning device. The chain tensioning device comprises a driven member arranged on the chain guide and a driving member which drives the driven member to move the chain guide longitudinally and a rotating device rotating the driving member. A stepless clutch device is arranged between the rotating device and the driving member. The chain tensioning device presses the chain guide while it tensioning the saw chain. Thus it prevents effectively the chain guide from loosing after the saw chain is tensioned. The operation of the chain tensioning device is labour-saving. The chain tensioning device has a stable structure and it is hard to be worn. | 12-22-2011 |
| 20110314682 | QUICK-TIGHTENING DEVICE FOR A CHAIN SAW AND CHAIN UNIT FOR SAME - The invention relates to a rapid tensioning apparatus as well as to a chain unit and a sword suitable for it, by means of which the placing of saw chain and sword on the main body of the chain saw can be readily carried out and a tensioning of the saw chain is made possible without problems. | 12-29-2011 |
| 20120066917 | CHAIN SAW - A linear motion mechanism comprises a second rotating shaft having an external thread portion | 03-22-2012 |
| 20130086810 | CHAINSAW WITH CUTTING CHAIN TENSIONER - A saw having a power unit with a drive component and a housing for the power unit with a frame. A bar on the housing guides movement of an operatively positioned cutting chain driven by the drive component in an endless path. The bar is movable guidingly in opposite directions in a predetermined path relative to the housing to thereby vary tension upon an operatively positioned cutting chain. A bar fixing assembly has a knob that is turnable around a first axis relative to the housing in: a) a first direction to a tightened state; and b) a second direction to a loosened state. A first assembly resiliently bears against the knob to at least one of: a) inhibit turning of the knob around the first axis; b) provide a sensory indication to a user grasping and turning the knob that the knob is moving around the first axis; and c) reduce play in the knob. | 04-11-2013 |
| 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 |
| 20140250702 | HANDHELD WORK APPARATUS HAVING A TENSIONING DEVICE FOR A CHAIN - A handheld work apparatus has a guide bar having a periphery along which a chain runs. The work apparatus has a housing and a fastening arrangement for fixing the guide bar to the housing. The fastening arrangement has an actuating device which can be actuated in a fastening direction in order to fix the guide bar. The work apparatus has a tensioning device to tension the chain. The tensioning device includes a tensioning spring. When the fastening arrangement is loosened, the tensioning spring exerts a force in a tensioning direction of the chain on the guide bar. Simple operation and a simple construction are achieved if the tensioning spring is in operative connection with the actuating device and is tensioned during actuation of the actuating device in the fastening direction. | 09-11-2014 |
| 20140290075 | GUIDE BAR FASTENING DEVICE FOR CHAIN SAW - To provide an operation lever including a first lever that has a base end portion swingably supported to a peripheral portion of a nut member for fastening a guide bar in a chain saw, and a second lever that is engaged with the first lever in a manner slidable in an axial direction. The operation lever can be placed in a receiving portion of the nut member with an axial length thereof shortened, and can be manipulated to rotate the nut member by being gripped on an outer end portion of the second lever in a state in which the operation lever is lifted out from the receiving portion and the axial length is lengthened. Thus, a sufficient fastening force for the guide bar can be obtained, and operability can be improved. | 10-02-2014 |
| 20140290076 | CHAIN TENSION ADJUSTING APPARATUS FOR CHAIN SAW - In a chain saw, an operating shaft member axially rotated by a manual operation of a rotating lever is disposed so that an axial direction thereof may be inclined against an attaching surface of a guide bar in which a saw chain is wound around a circumference thereof, a driving bevel gear attached to an end portion of the operating shaft member meshes with a driven bevel gear attached to an end portion of a rotating shaft member, and the rotating shaft member is axially rotated. Thus, the guide bar is moved in a longitudinal direction thereof to adjust tension of the saw chain. | 10-02-2014 |
| 20150059191 | CHAIN TENSION ADJUSTMENT DEVICE OF CHAIN SAW - To provide a chain tension adjustment device for a chain saw. When a first mechanism is rotated around an axis, a bevel gear of a second mechanism is engaged with a bevel gear of the first mechanism and rotated, and a bevel gear of a third mechanism is engaged with the other bevel gear of the second mechanism, so that a shaft portion is rotated. A plate portion integrated with a nut portion of a fourth mechanism screwed on a screw formed on the shaft portion moves in an axial direction, and a guide bar engaged with an engagement portion of the plate portion via an engagement hole moves in a longitudinal direction, to adjust tension of the chain saw by adjusting the movement amount. Thus, fine adjustment can be performed while reducing an operating force, and reducing the weight and the cost. | 03-05-2015 |
| 20150135542 | FEEDBACK SYSTEM FOR BAR CLAMPING - A knob sub assembly for adjusting bar clamp tension holding a chainsaw bar of a chainsaw to a chainsaw body of the chainsaw may include a cap, a nut and a feedback assembly. The nut may be threaded to facilitate engagement with a fixing post of the chainsaw body responsive to a transfer of torque from the cap to the nut when the cap is rotated by an operator. The feedback assembly may be disposed substantially between the cap and the nut to at least selectively transfer torque from the cap to the nut. The feedback assembly may provide feedback to the operator when a predetermined threshold of applied torque is reached. | 05-21-2015 |
| 20160039110 | CHAINSAW WITH SELF-LOCKING KNOB ASSEMBLY - A clamping assembly ( | 02-11-2016 |
| 030387000 | Multisectioned guide bar | 5 |
| 20080244915 | Carving and light utility chain saw guide bar - A lightweight chainsaw guide bar capable of carving and shaping wood and other solid materials with the ability to cut in curvilinear fashion in a tighter radius due to hollowing out or eliminating portions of the guide bar. | 10-09-2008 |
| 20110010952 | Guide Bar for the Saw Chain of a Power Saw - A guide bar for the saw chain of a power saw, including an elongated, planar main body having an outer periphery that is provided with a guide groove for guiding a saw chain. A direction-changing section is disposed at a free end of the guide bar and includes two side plates. At least one rivet is provided for securing the side plates to the main body, with the rivet extending through an opening in the main body. On at least one side of the main body, the opening is provided with a flared depression for receiving an adjacent element. | 01-20-2011 |
| 20120279074 | CHAINSAW CARVING GUIDE BAR - A chainsaw guide bar adapted for carving and shaping a workpiece. In one embodiment, a guide bar includes a mounting end, a distal working end, and an intermediate portion offset from the longitudinal axis defined the mounting end. In one embodiment, the guide bar includes an axially elongated recess providing an unsupported span of chain which is movable between undeflected and deflected positions for contouring a workpiece. The chain is engaged with and supported in a guide rail slot along the top peripheral edge of the guide bar. Various embodiments of the guide bar have an asymmetrical shape. The guide bar may further include an idler sprocket mechanism operable to guide movement of the saw chain along the outer peripheral edge of the guide bar. | 11-08-2012 |
| 20130031793 | CHAIN BAR APPARATUS AND METHODS AND TOOL COMBINATIONS AND METHODS OF MAKING AND USING MOVING TOOL COMBINATIONS - Chain bar apparatus and methods are disclosed that may be formed from plastic, metal or other materials. Laser cutting of a chain bar core can provide improved structural characteristics, for example when adhesive is used to assemble the chain bar. Flow diversion elements can be used to optimize flow throughout the chain bar. | 02-07-2013 |
| 20150052762 | GUIDE BAR FOR A SAW CHAIN HAVING A REDUCED-WEAR DIRECTION-REVERSING SECTION - A guide bar for a saw chain includes an elongate, flat base body made of a basic material. The base body extends along a longitudinal center axis and, in order to guide a saw chain, has a running surface formed on an outer periphery thereof and a guide groove formed in the outer periphery of the base body. The guide groove has a groove base. A direction-reversing section for the saw chain is provided at one end of the base body. The direction-reversing section includes at least one add-on component having a running surface made of more wear-resistant material than the basic material of the base body. The add-on component is secured to the base body of the guide bar by at least one weld seam. The weld seam extends between the add-on component and the base body and is located spatially beneath the groove base. | 02-26-2015 |
