| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 030382000 | With guard means | 16 |
| 20090193669 | Hand-Guided Power Tool - A hand-guided power tool has a drive motor and a drive element connected to and driven by the drive motor. A working tool is connected to the drive element and driven by the drive element. A braking device is correlated with the drive element, wherein the braking device in a first state, in which the braking device is applied, blocks the drive element and in a second state, in which the braking device is released, releases the drive element so that the drive elements can rotate freely. The braking device has a brake lever and a sensor that detects the first and second states of the braking device. A control unit is provided, wherein an output signal of the sensor as a state signal of the first state or the second state is supplied to the control unit. The control unit, based on the state signal, controls devices of the power tool. | 08-06-2009 |
| 20100064532 | Chain saw 3D relative positional monitoring and anti-kickback actuation system - A system effectuates increased cutting device safety through rapid detection of abrupt motion of the device, and/or the proximity of the device cutting elements in relation to its operator. An signal processor receives, generates and processes signals from multidimensional relative distances measurement module(s) and adjusts an electro-mechanical interface with the cutting device drive and/or power mechanism as well as actuators to counteract dangerous movements of the chainsaw. Distance measurement modules resident on the user may be spatially dispersed to protect multiple areas of potential interaction between device and operator. The signal processor receives and processes the sensor signals, determines motion and proximity measurements, compares the measurements to predetermined and set thresholds, and effectuates device interruption should thresholds be reached. The signal processor contains a signal processing algorithm which accounts for noise and invalid sensor measurements such as those made due to some external object physically disrupting proximity sensor-pair measurements. The system also records on nonvolatile medium chainsaw usage parameters for later diagnosis and analysis. The system also includes secondary relative distance measurement modules to be incorporated into an apparatus worn by a second party assisting the chainsaw user. The system also includes secondary accelerometers and proximity sensors as a back up measurement means. | 03-18-2010 |
| 20100088904 | ARRANGEMENT FOR THE CAPTURE OF A BROKEN SAWCHAIN - An arrangement for the capture of a broken sawchain ( | 04-15-2010 |
| 20100192391 | BRAKE SYSTEM OF CHAIN SAW AND CHAIN SAW - According to a chain saw braking system, engagement between a front end portion of a belt and a main body by an engagement member is released at the time of application of an impact. When a front end portion is pulled by the spring force of a compression coil spring, an elongate hole for protrusion is engaged with a protrusion to restrict a rear end portion from being moved in the same direction as the front end portion. Thus, it is possible to strongly tighten a drum by the belt to thereby reliably stop the movement of a chain. With this arrangement, the chain can be prevented from being damaged when a chain saw is accidentally dropped onto the ground due to an impact applied thereto. | 08-05-2010 |
| 20100229405 | Chain guard for a motor-driven chain saw - A chain guard for a motor-driven chain saw has a narrow casing with a front end and a back end. The casing has two parallel side walls and an upper wall and a lower wall connecting the side walls to each other. The casing is closed at the front end thereof and defines an opening at the back end. A device is provided on the casing for attaching the chain guard to the clothing of the operator, a rope, a carabiner or the like. | 09-16-2010 |
| 20110146086 | Chainsaw and attachment therefor - A chainsaw and an attachment are disclosed. A lock strip is aligned with and near the bottom edge of the chain bar. A plurality of substantially C-shaped stop members engage non-circular indentations formed in the lock strip with one leg and the opposite side of the bar chain with the other leg. The substantially C-shaped stop members are large enough to go around the chain without touching the chain and to block brush and small limbs so as to be cut and from being dragged by the chain into the housing. A tightening screw is associated with each of the plurality of substantially C-shaped stop members for holding the C-shaped stop member in a tight relationship with both the lock strip and the chain bar. In one arrangement, each of the plurality of non-circular indentations is substantially square and the shape of the mating part of the leg of the substantially C-shaped stop member is also square to create a snug fit. The lock strip also forms a plurality of circular cutouts, one circular cutout in the bottom of each substantially square indentation, through which the tightening screw tightens the substantially C-shaped stop member and, therefore, the lock strip directly against the chain bar. The tightening screws and the substantially C-shaped stop members can be removed and the lock strip can be moved to different places along the bottom edge of chain bar, where the substantially C-shaped stop members and the tightening screws can be re-attached. | 06-23-2011 |
| 20110203122 | Kct injury prevention chain saw - A chainsaw that increases the level of operator safety by reducing or eliminating cut through and kickback injuries without impeding cutting operations, and increases operator comfort through ergonomics, therefore extending stamina. This is accomplished by a dual stage multi-hinged bar device that physically inhibits kickback and cut through injuries. The device, which returns to it's original position after cutting, will open up a total of 88 degrees to allow for cutting of items that are larger than the length of the guide bar. Relocation of the handles leads users toward physically holding the saw in such a manner that creates an ergonomically advantageous body position, reducing fatigue and strains. The body of the saw and the bar device will rotate 45 and 90 degrees both right and left while the operators grip on the saw remain in the same position. The chainsaw also incorporates an easy to use chain adjustment. | 08-25-2011 |
| 20110203123 | Ktc injury prevention chain saw - A chainsaw that increases the level of operator safety by reducing or eliminating cut through and kickback injuries without impeding cutting operations, and increases operator comfort through ergonomics, therefore extending stamina. This is accomplished by a dual stage multi-hinged bar device that physically inhibits kickback and cut through injuries. The device, which returns to it's original position after cutting, will open up a total of 88 degrees to allow for cutting of items that are larger than the length of the guide bar. Relocation of the handles leads users toward physically holding the saw in such a manner that creates an ergonomically advantageous body position, reducing fatigue and strains. The body of the saw and the bar device will rotate 45 and 90 degrees both right and left while the handles and operators grip remain in the same position. The chainsaw also incorporates an easy to use chain adjustment. | 08-25-2011 |
| 20110265334 | HANDGUARD FOR CHAINSAW - The invention relates to a chainsaw having a front hand guard ( | 11-03-2011 |
| 20120102765 | 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 |
| 20130091715 | HANDHELD WORK APPARATUS HAVING A GUARD - A handheld work apparatus such as a stone cutter ( | 04-18-2013 |
| 20130180118 | CHAIN SAW - A chain saw includes: a motor driven by electric power; a housing configured to accommodate the motor; a guide bar attached to the housing; a chain blade wound around the guide bar; a sprocket engaged with the chain blade to drive the chain blade, wherein the chain saw is configured to transmit a driving force of the motor to the sprocket via a clutch mechanism, wherein the chain saw comprises a shut-off switch for detecting an actuation of the clutch mechanism and is configured such that the power supply to the motor is stopped when the actuation of the clutch mechanism is detected by the shut-off switch so as to brake electrically. The electrical brake is provided together with a mechanical brake that is configured to work when a hand guard is rotated. | 07-18-2013 |
| 20130305545 | CHAIN GUARD AND CHAINSAW SYSTEM - The application relates to a chain guard for a chainsaw with interchangeable cutting attachments of different lengths, said cutting attachments having cutting chains, wherein the chain guard comprises an insertion opening for inserting a cutting attachment, at least two side walls for covering lateral surfaces of the cutting attachment, a front end opposite the insertion opening, a first latching depression formed in at least one side wall, and a second latching depression formed in at least one side wall at a distance closer toward the insertion opening with respect to the first latching depression, wherein the first latching depression and the second latching depression each comprise an arcuate latching surface for latching in a form-fitting manner with a cutting chain of the cutting attachment, said latching being active in the direction of a longitudinal axis of the chain guard, and also to a chainsaw system having such a chain guard. | 11-21-2013 |
| 20140290074 | PORTABLE WORKING MACHINE - A portable working machine according to the present invention has a cover member detachably attached to a working machine body, includes a bolt member vertically provided to a working machine body, a detachable cover member having a through-hole and attached to the working machine body by inserting the bolt member through the through hole, a fixing member which is screwed with the bolt member and fixes the cover member to the working machine body, and a holding member which is attached to an outer surface of the cover member while having a predetermined gap space between the holding member and the outer surface of the cover member and holds the fixing member on an outer side of the cover member to prevent drop of the fixing member of which fastening to the bolt member is released. | 10-02-2014 |
| 20140310965 | HAND GUARD FOR CHAINSAW - The present disclosure relates to a chainsaw having a front hand guard including a protective structure, projecting in front of the front handle, pivotally attached to the engine housing by at least one lever for activating a brake to brake the movement of the saw chain when being pivoted. The protective structure includes see through means enabling at least partial visibility through the protective structure, and twig preventing means for limiting the risk of objects such as twigs to get stuck in the protective structure. | 10-23-2014 |
| 20150321381 | Power Cutting Tool having a Guard Unit - A power cutting tool includes at least one cutting strand and at least one guide unit configured to guide the cutting strand. The power cutting tool further includes at least one cutting strand contact guard unit which has at least one cutting strand contact guard element. The at least one cutting strand contact guard element is movably mounted on the guide unit and is configured to at least substantially prevent, in at least one operating position of the cutting strand contact guard element, contact between the cutting strand and a user of the power cutting tool. | 11-12-2015 |
