Chain Patents (Class 30/381)
  • Patent number: 11453110
    Abstract: Provided is an electric power work device which includes: a body case; a work tool protruding forward from a front side with respect to the body case; a motor; and a battery supplying power to the motor. The motor is accommodated in the body case and the battery is detachably attached to a rear side with respect to the body case. A top handle is extended in a longitudinal direction at an upside with respect to the body case. The top handle includes, on an upper surface of a front part thereof, a thumb rest and a power switch. The power switch is arranged on a side in a lateral direction of the thumb rest.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: September 27, 2022
    Assignee: YAMABIKO CORPORATION
    Inventors: Hisato Osawa, Kenji Nakano
  • Patent number: 11441666
    Abstract: A conveyor for a combine harvester includes a chain and a sprocket. The sprocket includes an annular body defining an axis of rotation, two opposing sides, an outer perimeter extending between the two opposing sides, and gear teeth disposed on the outer perimeter. A bottom land extends between valleys of adjacent gear teeth. A single continuous edge is defined between two gear teeth at one of the adjacent sides. The bottom land includes (i) a central plateau portion, (ii) a first sloping surface extending from one edge of the central plateau portion to the single continuous edge at one of the two opposing sides, and (iii) a second sloping surface extending from the opposite edge of the central plateau portion to the single continuous edge at the other of the two opposing sides. The sloping surfaces either limit or prevent the accumulation of material thereon.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: September 13, 2022
    Assignee: CNH Industrial America LLC
    Inventors: Cale N. Boriack, Michael Minnich
  • Patent number: 11434974
    Abstract: A vibration absorber for absorbing a vibration of a vibrating component is provided and includes: a spring system and an absorber mass arranged on the spring system. The spring system includes: a first spring element with a first core, and a second spring element with a second core. The first spring element is arranged on the second spring element such that the second core borders the first core, and the vibration absorber can be fastened using a fixing element to the vibrating component in which the vibration is to be absorbed. Furthermore, a method of producing the vibration absorber is further provided.
    Type: Grant
    Filed: July 20, 2020
    Date of Patent: September 6, 2022
    Assignee: Sumitomo Riko Company Limited
    Inventors: Jörg Ditzel, Sebastian Bös
  • Patent number: 11389884
    Abstract: A handheld portable cutting apparatus has a cutter unit with a cutter unit longitudinal axis. In a central housing section of the cutting apparatus, a drive connection is arranged between an electric drive motor and the cutter unit, wherein a motor housing having a motor housing longitudinal axis extends from the central housing section. A handle extends from the central housing section in a handle longitudinal axis. The cutter unit includes a guide bar with a saw chain circulating thereon, wherein, in a side view onto the cutting apparatus, the point of intersection between the handle longitudinal axis and the motor housing longitudinal axis and also the point of intersection between the handle longitudinal axis and the cutter unit longitudinal axis lie in the central housing section.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: July 19, 2022
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Harald Mang, Alexander Trenn
  • Patent number: 11141874
    Abstract: A chainsaw 1 (electric-power-driven working device) comprises a body case 10, a cutting attachment 20 (work tool), a motor 30 and a battery 90. A front portion 11a of the body case 10 houses the motor 30 and a battery mount-and-release portion 12 is formed on a rear portion 11b of the body case 10. The battery 90 mounted on the battery mount-and-release portion 12 extends in an upper-lower direction across and over a middle portion in a height direction of the rear portion 11b of the body case 10. The side handle 50 arranged to a side face of the body case 10 extends from the front portion 11a to the rear portion 11b of the body case 10. A rear end portion 52 of the side handle is disposed rearward of and below an output shaft 31 of the motor 30.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: October 12, 2021
    Assignee: Yamabiko Corporation
    Inventors: Hisato Osawa, Atsushi Nishimura, Kenji Nakano
  • Patent number: 11015760
    Abstract: A hand-held power tool (100) may include an electric power source (110), an electric motor (120) selectively coupled to the electric power source (110), a working assembly (130) operably coupled to the electric motor (120) to perform a working function responsive to actuation of the electric motor (120), and a control assembly (140) operably coupled to the electric motor (120) to provide selective control over actuation of the electric motor (120). The control assembly (140) may be configured to provide the selective control based on performance of at least two dissimilar operator actions. The control assembly (140) may include a sensing member (210) and a throttle control member (200). The sensing member (210) may be configured to be operable to an actuated state responsive to an enabling action comprising a first of the two dissimilar operator actions.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: May 25, 2021
    Assignee: HUSQVARNA AB
    Inventors: Pär Martinsson, Mia Herou, Mikael Arvidsson
  • Patent number: 10816048
    Abstract: A work apparatus has a work tool driven by a combustion engine. A brake assembly has a brake element for braking the work tool as it slows down. In a braking position of the brake assembly, the work tool is braked, while, in a stand-by position of the brake assembly, the brake element enables the movement of the work tool. The brake element is held in the stand-by position by a holding force from an electromagnet supplied with energy by an electric generator driven by the engine, for which purpose, in the stand-by position of the brake assembly, a holding current is supplied to the electromagnet. To extend the holding time as the engine slows down, an operating parameter of the engine is monitored and, after a limit value of the operating parameter is reached, the holding current supplied to the electromagnet is reduced.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: October 27, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Michael Schneider, Felix Mayer, Tobias Deigendesch, Sebastian Hanussek
  • Patent number: 10807225
    Abstract: A handheld work apparatus includes a first assembly, a second assembly and an anti-vibration unit which includes a coil spring. A first end of the coil spring forms a fastening eyelet fixed to the first assembly by an attachment screw which extends through the fastening eyelet and the head thereof projects into the coil spring. A second end of the coil spring is screwed onto a connecting piece of the second assembly which has an opening extending through the connecting piece and through which an engagement contour in the head of the attachment screw is accessible for a tool. When the work apparatus is in a non-loaded state, the distance (f) between the fastening eyelet and a front end of the connecting piece is ?the length (g) of the attachment screw. The distance (p) of the above support surface from the front end of the connecting piece is the length (g).
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: October 20, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Carsten Freymueller
  • Patent number: 10730156
    Abstract: A start device is for a chainsaw having a combustion engine. The start device includes an electric motor with a control device, which initiates operation of the electric motor and starts up the combustion engine. The chainsaw has a brake device for bringing the tool to a standstill, wherein the brake device can be operated via an actuation lever. For this purpose, the actuation lever can be moved from a first position (A) into at least one further position (B). The control device is connected to a signal transmitter, which is actuated, and emits a signal to the control device, when the actuation lever is moved from the first position (A) into the further position (B), wherein the signal forms a start signal for initiating operation of the electric motor and for starting up the combustion engine.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: August 4, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Ernst Gorenflo
  • Patent number: 10605406
    Abstract: A hand-held power tool (100) may include an electric power source (110), an electric motor (120) selectively coupled to the electric power source (110), a working assembly (130) operably coupled to the electric motor (120) to perform a working function responsive to actuation of the electric motor (120), and a control assembly (140) operably coupled to the electric motor (120) to provide selective control over actuation of the electric motor (120). The control assembly (140) may be configured to provide the selective control based on performance of at least two dissimilar operator actions. The control assembly (140) may include a sensing member (210) and a throttle control member (200). The sensing member (210) may be configured to be operable to an actuated state responsive to an enabling action comprising a first of the two dissimilar operator actions.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: March 31, 2020
    Assignee: HUSQVARNA AB
    Inventors: Pär Martinsson, Mia Herou, Mikael Arvidsson
  • Patent number: 10589411
    Abstract: A work apparatus has a first and a second assembly. The second assembly is mounted movably in relation to the first assembly via at least one antivibration element. Formed between the first assembly and the second assembly is a vibration gap, which is bridged by the antivibration element. The work apparatus has a switch, for actuation by an operator, which includes a first contact element and a second contact element. When the switch is closed, the first contact element and the second contact element contact each other. When the switch is open, the first and second contact element do not establish an electrically conductive contact. The second contact element is part of the second assembly. The first contact element is part of the first assembly and, when the switch is closed, the first contact element and the second contact element bridge the vibration gap between the first and second assembly.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: March 17, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Andreas Schulz, Ralf Blechschmidt
  • Patent number: 10299804
    Abstract: A dual speed medical procedure power tool includes first and second gear sets. The first and second gear sets may be engaged and disengaged, selectively, to provide a first speed for a high-speed, low-torque drilling function and a second speed for a low-speed, high-torque reaming function.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: May 28, 2019
    Assignee: INSURGICAL, INC.
    Inventors: Peter M Aman, Richard Acevedo
  • Patent number: 10118307
    Abstract: A chain saw has a fluid pump. The fluid pump has a pump rod, a pump core assembly defining a pumping channel, and a pump body. The pump core assembly has an inner pump core and an outer pump core. The pumping channel is formed at least by a first hole defined in the inner pump core and a second hole defined in the outer pump core and the first hole is in communication with the inlet and the outlet. The pump rod is arranged to do a straight reciprocating motion in the pumping channel along a first axis so as to force fluid to flow from the inlet to the outlet by passing through the first hole.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: November 6, 2018
    Assignee: Chervon (HK) Limited
    Inventors: Toshinari Yamaoka, Fangjie Nie, Huixing Fu
  • Patent number: 10040214
    Abstract: 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.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: August 7, 2018
    Assignee: BARON INVESTMENTS LLC
    Inventor: Anthony Baratta
  • Patent number: 9919413
    Abstract: A counterbalanced chainsaw mount is provided that includes a pin joint, a suspended counterweight, and a counterweight support assembly between the pin joint and counterweight. The chainsaw mount assists cutting a work piece with a chainsaw, controlling the cutting motion and counterbalancing the chainsaw to prevent kickback. The pin joint is secured to a work table or alternative support, whereby the support assembly secures at one end to the guide bar of the chain saw. Along an opposite end, the support assembly supports the counterweight. The support assembly comprises an intermediate member extending along the chainsaw guide bar and an upstanding member supporting the counterweight. The counterweight is positioned an offset distance away from the distal end of the chainsaw guide bar such that the intermediate member is biased to rotate about the pin joint and therefore elevate the proximal end of the chainsaw guide bar while attached thereto.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 20, 2018
    Inventor: Brian Smollar
  • Patent number: 9605570
    Abstract: A vehicle includes a vehicle body and an engine unit. The engine unit is installed on the vehicle body. The engine unit includes a crankshaft, an engine body, an oil tank, and an oil path. The crankshaft extends in a horizontal or substantially horizontal direction. The engine body includes a crankcase, a cylinder unit, and a head cover. The crankcase supports the crankshaft. The cylinder unit is disposed over the crankcase. The head cover is disposed over the cylinder unit. The oil tank is disposed rearward of the engine body. The oil path communicates with a space inside the head cover and is at least partially integral with the oil tank.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: March 28, 2017
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventor: Naoki Harada
  • Patent number: 9568063
    Abstract: The invention relates to a vibration damper for a machine component which vibrates in the operating state thereof, wherein a damping mass arrangement is coupled to the machine component via a clearance and wherein the excitation of the damping mass arrangement in at least one vibration direction originates from a substantially shocklike interaction between the damping mass arrangement and the machine component. The invention leads to an increase in dampening efficiency due to the utilization of shock-like transfer of vibration energy.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: February 14, 2017
    Assignee: ILLINOIS TOOL WORKS, INC.
    Inventor: Oliver Weiss
  • Patent number: 9403226
    Abstract: A chain saw includes a housing, an oil supply system disposed in the housing, a trigger linkage assembly, and a switch controlled by the trigger linkage assembly. The oil supply system includes an oil can and an oil pump assembly connected with the oil can via an oil inlet tube. The trigger linkage assembly includes a switch trigger. The chain saw further includes a pressing member driven by the trigger linkage assembly. When the switch trigger is not activated, the pressing member is located at a first position and can press the oil inlet tube tightly to isolate an oil circuit of the oil supply system. When the switch trigger is pressed down, the pressing member can be driven by the trigger linkage assembly to a second position to release the pressing for the oil inlet tube so that the oil circuit of the oil supply system is allowed to flow.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: August 2, 2016
    Assignee: Chevron (HK) Limited
    Inventors: Huixing Fu, Fangjie Nie
  • Patent number: 9381666
    Abstract: An apparatus for automatically adjusting a chainsaw cutting element as the chainsaw cutting element lengthens during use due to thermal expansion includes an elongate flat bar circumscribed by the chainsaw cutting element, a motor for causing the chainsaw cutting element to rotate about the elongate flat bar, a motor housing for housing the motor and a cover housing secured to the motor housing for covering a proximal end of the elongate flat bar and a rotatably mounted sprocket gear that engages a proximal end of the chainsaw cutting element. The elongate flat bar has a first, fully retracted position, a second, fully extended position, and an infinite number of positions of adjustment therebetween. Bias members continuously urge the elongate flat bar to displace during saw operation in a proximal-to-distal direction from the first, fully retracted position to the second, fully extended position to maintain chain tension at all times.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: July 5, 2016
    Inventor: Andrew M. Moody
  • Patent number: 9278444
    Abstract: A handheld work machine comprises a main body comprising a prime mover and a handle fixed to the main body and configured to be gripped by a user. The handle is formed by pipe material and at least one reinforcement member is disposed at a longitudinal portion of the handle that configures a part of the handle. The reinforcement member may be formed by pipe material and preferably disposed inside the handle. The longitudinal portion where the reinforcement member is disposed may preferably include a fixed portion of the handle that is fixed to the main body.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: March 8, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Masayoshi Okumi, Masaki Kondo
  • Patent number: 9216517
    Abstract: A handheld work apparatus has a drive motor (8) that is held in a motor housing (2). At least one handle (4) is provided, with a vibration gap (12) being formed between the handle (4) and the motor housing (2). The vibration gap (12) permits a relative movement between handle (4) and motor housing (2). The handle (4) is connected to the motor housing (2) via at least one anti-vibration device (13, 14, 15, 16, 31, 49, 50, 63) that bridges the vibration gap (12). The anti-vibration device (15, 16, 31, 49, 50, 63) has a longitudinal center axis (23, 24). The anti-vibration device (15, 16, 31, 49, 50, 63) bridges the vibration gap (12) via at least one tension element. The anti-vibration device (15, 16, 31, 49, 50, 63) also has a spring (17, 32, 33, 51, 55, 72, 73) arranged functionally in series with the tension element.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: December 22, 2015
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jan Kurzenberger, Johannes Menzel, Helmut Lux
  • Patent number: 9168671
    Abstract: The invention concerns a method for a sawchain and a sawchain. According to the method according to the invention, a sawchain intended to be used for a sawing arrangement for a forestry harvester in order to prevent the whip-like movement of a sawchain that breaks during sawing, is achieved through a method that comprises the steps: —that the sawchain (1) is provided with a means (20) of limiting pivoting that allows a forwardly located link (3, 4, 5, 2) of the sawchain to pivot in a first direction relative to the subsequent link (3, 4, 5, 2) while limiting the ability of the forwardly located link to pivot in an opposite second direction relative to the subsequent link, —that the sawchain (1) is driven around a guide bar (9) with the aid of a driving wheel that is located at one end of the guide bar, —that sawing of a tree trunk is carried out through the guide bar (9) being turned around an axis of rotation.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: October 27, 2015
    Assignee: Komatsu Forest AB
    Inventors: Tommy Englund, Per Hedström
  • Patent number: 9138912
    Abstract: 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.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: September 22, 2015
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Ulrich Kapinsky, Helmut Zimmermann, Jochen Oerding
  • Patent number: 9138884
    Abstract: A handheld work apparatus has an electric drive motor (24) and a power supply unit for the drive motor (24). The power supply unit is arranged in a receptacle (7) of a housing (2) of the work apparatus. The work apparatus has an electronic control (17) and a blower wheel (29) for conveying cooling air. The blower wheel (29) is driven by a drive motor (24). The housing (2) has at least one air inlet opening (10) for cooling air via which the blower wheel (29) draws in a first cooling air flow (22) during operation. A second cooling air flow (23) is drawn into the housing (2) via the receptacle (7).
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: September 22, 2015
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Georg Heinzelmann, Gernot Liebhard, Dirk Förstner
  • Patent number: 9138846
    Abstract: A battery-powered tool includes: a housing, a driven element supported by the housing, an electric motor coupled to the driven element so as to drive the driven element, a battery electrically coupled to the motor so as to supply electric current to the motor and a control circuit arranged to control the supply of electric current to the motor from the battery. The control circuit includes a main switch operable by a user and an auxiliary switch also operable by a user. The control circuit has an active state in which operation of the main switch by the user allows electric current to flow to the motor to cause the driven element to be driven; and an inactive state in which operation of the main switch does not allow electric current to flow to the motor and so the motor does not drive the driven element. Operation of the auxiliary switch causes the control circuit to change between the active and inactive states.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: September 22, 2015
    Assignee: HUSQVARNA AB
    Inventors: Johan Svennung, Pär Martinsson, Johan Björnlinger
  • Patent number: 9016672
    Abstract: The present invention concerns a handheld working tool comprising a motor part (10), a handle part (20) comprising a handle grip (21), and at least one first type antivibration element (30) arranged between said motor part (10) and said handle part (20), and which element (30) is adapted to isolate the handle part (20) from vibrations in the motor part (10). The working tool (1) is characterized in that it further comprises at least one second type antivibration element (40) arranged adjacent to the first type antivibration element (30). The at least one second type antivibration element (40) is adapted to, when in an active state, prevent vibrations in the motor part (10) from being transferred to the handle grip (21). The second antivibration element (40) is in the active state when the handle grip (21) is loaded during operation of the working tool (1).
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: April 28, 2015
    Assignee: Husqvarna AB
    Inventors: Thomas Englund, Pär Martinsson
  • Patent number: 8973276
    Abstract: The invention relates to a chainsaw having a front hand guard (20) including a protective structure (21), projecting in front of the front handle (5), pivotally attached to the engine housing (2) by at least one lever (25, 26) for activating a brake to brake the movement of the saw chain when being pivoted. The protective structure (21) includes see through means (24) enabling at least partial visibility through the protective structure (21), and twig preventing means for limiting the risk of objects such as twigs to get stuck in the protective structure (21).
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: March 10, 2015
    Assignee: Husqvarna AB
    Inventors: Hugo Van Bijsterveldt, Stofan Stark
  • Publication number: 20150059190
    Abstract: A machine tool separating device, in particular a manual machine tool separating device, includes at least one cutting train that comprises at least one cutter-support element and at least one connecting element that is integrally formed with the cutter-support element. The cutter-support element has at least one transverse securing element that is configured to secure the cutter-support element against a transverse movement relative to another cutter-support element of the cutting train to the greatest extent possible in the assembled state.
    Type: Application
    Filed: January 4, 2013
    Publication date: March 5, 2015
    Inventors: Uwe Engelfried, Petr Grulich
  • Publication number: 20150026988
    Abstract: A hand-held work implement comprises a housing, at least one tool and a combustion engine for driving the tool. The combustion engine has a cylinder and has a piston which drives a crankshaft in rotation about an axis of rotation. The crankshaft drives a fan impeller. The work implement has a handle unit with a handle bar and has an engine unit, these being connected to one another via anti-vibration elements. The combustion engine has a transverse plane which encompasses the cylinder longitudinal axis and which runs parallel to the axis of rotation of the crankshaft. The transverse plane divides the work implement into a front region, in which a section of the tool that projects out of the housing is arranged, and a rear region. The fixing of the anti-vibration element to the cylinder is realized in the front region.
    Type: Application
    Filed: July 28, 2014
    Publication date: January 29, 2015
    Applicant: ANDREAS STIHL AG & CO. KG
    Inventors: Jan Kurzenberger, Jens Knauß, Johannes Menzel, Sebastian Friedrich
  • Patent number: 8935856
    Abstract: 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.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: January 20, 2015
    Assignee: Hitachi Koki Co., Ltd.
    Inventor: Naoki Tsuruoka
  • Patent number: 8904651
    Abstract: A portable handheld work apparatus includes a drive motor (26) which drives a work tool via a drive shaft (25). The work apparatus further includes a brake drum (8), which is connected to the drive shaft so as to rotate therewith, and an oil pump (15) which is driven by the drive shaft (25) via a drive worm gear (20). A simple configuration and a long service life are obtained when the drive worm gear (20) is formed on a pot-shaped component (31). The edge (30) of the pot-shaped component (31) is connected to the brake drum so as to rotate therewith. The pot-shaped component is self supported in the region of its base (40) on the drive shaft (25).
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: December 9, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Georg Heinzelmann
  • Patent number: 8881408
    Abstract: A combined fuel tank and handle unit for a motorized, handheld tool includes a substantially closed volume, a handle, and a joint between two parts of the unit. The joint protrudes a distance beyond the surrounding surfaces. At least one rib is disposed at a distance from the joint on the underside of the tool.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: November 11, 2014
    Assignee: Husqvarna AB
    Inventors: Pär Martinsson, Stefan Kullberg
  • Publication number: 20140283395
    Abstract: A chain saw includes a housing, an oil supply system disposed in the housing, a trigger linkage assembly, and a switch controlled by the trigger linkage assembly. The oil supply system includes an oil can and an oil pump assembly connected with the oil can via an oil inlet tube. The trigger linkage assembly includes a switch trigger. The chain saw further includes a pressing member driven by the trigger linkage assembly. When the switch trigger is not activated, the pressing member is located at a first position and can press the oil inlet tube tightly to isolate an oil circuit of the oil supply system. When the switch trigger is pressed down, the pressing member can be driven by the trigger linkage assembly to a second position to release the pressing for the oil inlet tube so that the oil circuit of the oil supply system is allowed to flow.
    Type: Application
    Filed: September 23, 2013
    Publication date: September 25, 2014
    Applicant: Chevron (HK) Limited
    Inventors: Huixing Fu, Fangjie Nie
  • Patent number: 8833322
    Abstract: A portable work apparatus has a combustion engine for driving a work tool. An air/fuel mixture is supplied to the engine via a carburetor which is provided with an electrical heating element for heating to a given temperature. The heating element is connected to a switch via which electrical energy, which is provided by a generator driven by the engine, is supplied. When a given temperature is exceeded, the switch interrupts the energy supply. To achieve an exact temperature control, the ohmic resistance value of the heating element is stored in a memory in dependence on the temperature. The current flowing through the heating element and the voltage drop at the heating element are measured and the instantaneous resistance of the heating element is calculated therefrom. This calculated value is compared to the value stored in the memory to open or close the switch in dependence on the comparison.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: September 16, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Heinrich Leufen, Jörg Präger, David Fallscheer, Rolf Walter, Michael Link
  • Patent number: 8836529
    Abstract: A chain saw hazard warning light and method for using same. A pair of oppositely-directed light sources emit light beams throughout a chain shot hazard warning zone through rectilinear, slotted openings at opposite ends of a housing. The light beams turn on, if and only if, the cutting chain is rotating about the chain guide bar; alternatively, initiation of rotation of the cutting chain is delayed to permit the light beams to turn on some time prior thereto. The zone is defined by first and second pairs of planes that diverge in opposite directions from the chain guide bar, said planes being disposed at equal, acute angles (most preferably 15°) to, and on opposite sides of, a plane that includes the chain guide bar.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: September 16, 2014
    Inventor: Kenneth J. Thomsen
  • Patent number: 8833485
    Abstract: A battery-powered portable tool, such as a chainsaw, hedge trimmer or handheld drill, comprising: a housing (1), a driven element (2) supported by the housing (1), an electric motor (6) coupled to the driven element (2) so as to drive the driven element (2), a battery (5) electrically coupled to the motor (6) so as to supply electric current to the motor (6) and a control circuit (8) arranged to control the supply of electric current to the motor (6) from the battery (5), in which the control circuit (8) comprises a main switch (8) operable by a user and an auxiliary switch (10, 11) also operable by a user; in which the control circuit (8) has: an active state in which operation of the main switch (8) by the user allows electric current to flow to the motor (6) so as to cause the driven element (2) to be driven; and an inactive state in which operation of the main switch (8) does not allow electric current to flow to the motor (6) and so the motor (6) does not drive the driven element (2); in which operation
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: September 16, 2014
    Assignee: Husqvarna AB
    Inventors: Johan Svennung, Pär Martinsson, Johan Björnlinger
  • Patent number: 8832947
    Abstract: A top-handle portable working machine includes a grip configuration that makes it easy for a worker to manipulate the implement as intended in order to adapt to tasks in which accuracy, fineness, or an attractive finish is needed. The direction of an axis in which the top grip extends and the direction of a working axis of the implement are inclined relative to each other in a vertical direction so as to intersect at a point to the rear of the housing at angle between 15 and 25°. A detachable grip-position restricting member is attachable to a concave part of the top grip.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: September 16, 2014
    Assignee: Yamabiko Corporation
    Inventors: Hisato Osawa, Kazuhiro Yoneyama
  • Patent number: 8813369
    Abstract: The invention relates to hand-held hedge shears with an in particular electric driving motor. The hedge shears comprises a gripping housing with a rear handle, wherein a gripping part of the rear handle is rotatable about the longitudinal axis thereof and is lockable in the rotational position thereof by means of a locking element. An operating switch lever for the driving motor is arranged on the rotatable gripping part, wherein the operating switch lever acts by means of a sliding element and a transmission element on a switch unit for the rotational speed position of the driving motor. The sliding element is guided on the locking element in a manner sliding in the direction of the longitudinal axis.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: August 26, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: David Krätzig
  • Patent number: 8813374
    Abstract: 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.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: August 26, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Jonas Lank, Peter Stahl, Helmut Zimmermann, Klaus-Martin Uhl, Friedrich Hollmeier
  • Publication number: 20140215838
    Abstract: A battery-powered chain saw is provided which chain saw comprises a housing (10) extending in a longitudinal direction (X) between a front end (12) and a rear end (11), a rear handle (20) fixedly connected to or integral with the housing (10) and extending in the longitudinal direction (X), a front handle (30) fixedly connected to the housing (10) and an electric motor (40) arranged to drive a cutting element of the chain saw, the electric motor having a motor rotation axis (A1). The chain saw has a longitudinal rotation axis (X1). It is characterized in that a point (60) in which a center axis (A) of an upper portion (31) of the front handle (30) intersects a vertical plane (P) comprising the longitudinal rotation axis (X1) of the chain saw, is positioned rearwardly of a point (70) in which the motor rotation axis (A1) intersects said vertical plane (P).
    Type: Application
    Filed: August 26, 2011
    Publication date: August 7, 2014
    Applicant: HUSQVARNA AB
    Inventor: Oskar Bergquist
  • Patent number: 8793885
    Abstract: A handheld engine-driven cutter is provided with a disk blade and a four-stroke engine that drives the disk blade. By employing the four-stroke engine, exhaustion of unburned gas and fuel consumption can be reduced. The engine cutter is further provided with a filter through which air provided to the four-stroke engine passes, a carburetor that mixes fuel and the air that passed through the filter, and a casing that houses the filter and the carburetor. The filter and the carburetor are arranged to align on a straight line along a direction of flow of the air passing through the filter and the carburetor.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: August 5, 2014
    Assignee: Makita Corporation
    Inventors: Masaki Sugiyama, Tetsuya Hasegawa, Masaki Kondo, Tomonobu Nashimoto, Masayoshi Okumi, Takashi Miyazaki
  • Patent number: 8794196
    Abstract: A cooling fan includes: a hub; a plurality of cooling vanes provided along an outer circumference of the hub; and an annular connector for connecting the cooling vanes. The hub is provided with a through hole that axially penetrates the hub. A first cover on a case for covering an outward side of the cooling fan is provided with a first outer-air intake. A second cover for partitioning between the cooling fan and a crankcase and for covering an inward side of the cooling fan is provided with a second outer-air intake. With this arrangement, even when one outer-air intake (for instance, the first outer-air intake) adjacent to where the cooling vanes are provided is clogged by a large amount of dust generated during operations, the cooling vanes can breathe from the non-clogged other outer-air intake (for instance, the second outer-air intake) through the through hole, thereby restraining reduction in air flow.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: August 5, 2014
    Assignee: Husqvarna Zenoah Co., Ltd.
    Inventors: Koichi Shimokawa, Kiminobu Sato
  • Publication number: 20140190713
    Abstract: A guide and control assembly of a battery driven portable handheld power tool (1) is provided, which guide and control assembly (10) comprises a main handle (20) of the tool, arranged to be gripped by a hand of an operator, in an operating position, so as to permit the operator to carry and guide the power tool (1) with the hand during operational use thereof, a recessed user interaction panel (30) comprising a plurality of user input devices (31, 31?, 31?) and a first status indicating device (32), the user interaction panel (30) being formed in a panel receiving portion (41) of a housing (40) of the power tool (1), wherein the user interaction panel is positioned such that the user input devices (31) are reachable by a thumb of the operator when the hand is in the operating position.
    Type: Application
    Filed: August 26, 2011
    Publication date: July 10, 2014
    Applicant: HUSQVARNA AB
    Inventors: Pär Martinsson, Oskar Bergquist, Mikael Racov, Johan Svennung, Johan Björnlinger
  • Publication number: 20140173917
    Abstract: A portable hand held power tool (1), such as a chain saw or a power drill, having a receiving device (100) arranged on a body portion (2) of the power tool (1). The receiving device (100) is arranged for connecting/disconnecting to the portable hand held power tool (1) either a flexible elongated member, such as a rope, or a fastening device secured to the elongated member or to an operator of the portable hand held power tool (1). The receiving device (100) has a receiving portion (110) for receiving and leading the flexible elongated member there through. The receiving portion (100) extends substantially in a plane (P). Furthermore, the receiving device (100) has an attachment portion (120) which is arranged to connect the receiving device (100) to a body portion (2) of the portable hand held power tool (1) by means of a pivot assembly (4).
    Type: Application
    Filed: January 2, 2014
    Publication date: June 26, 2014
    Applicant: Husqvarna AB
    Inventors: Hugo Van Bijsterveldt, Rikard Rydberg, Peter Björkman
  • Patent number: 8757288
    Abstract: A handheld work apparatus having an electric drive motor has a battery pack (11) serving as a power supply unit for the drive motor. A receptacle for the battery pack (11) is provided on a housing (2) of the work apparatus. In order to simplify the mounting and arrange the battery pack (11) in a more favorable manner, a receiving compartment is provided in the housing (2) and a system carrier is arranged therein, to which electrical components (12, 13, 16) and electrical lines are affixed. A battery compartment (6) is formed in the system carrier (5) and contact elements for contacting the battery pack (11) are arranged on the system carrier (5). The electrical components (12, 13, 16) are interconnected and connected to the contact elements (18) by the lines located on the system carrier (5).
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: June 24, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Georg Heinzelmann, Andreas Binder
  • Patent number: 8752301
    Abstract: 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.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: June 17, 2014
    Inventor: Rex George
  • Patent number: 8707943
    Abstract: Saws (1) for cutting or sawing harder materials, such as concrete, concrete structures, brick and stone, have an endless cutting member (4) that is driven through a transmission assembly (11, 20) being supported in the saw and having a drive member and that is guidingly supported on a cutting member supporting portion (3). In such a saw a clamping member is provided that for providing a friction drive contact between the drive member, the clamping member and the cutting member is biased in a direction towards the drive member with driven parts (7) of the cutting member introduced there between, whereby an essentially reduced load on the actual saw, its parts and the cutting member is obtained as well as an improved functionality in the form of an increased flexibility and safety during operation of the saw. The invention also relates to a transmission assembly as well as a cutting member for such a saw.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: April 29, 2014
    Assignee: Sagningsteknik I Leksand AB
    Inventors: Björn Berglund, Magnus Hammar
  • Patent number: 8707568
    Abstract: A top-handle portable working machine includes a grip configuration that makes it easy for a worker to manipulate the implement as intended in order to adapt to tasks in which accuracy, fineness, or an attractive finish is needed. The direction of an axis in which the top grip extends and the direction of a working axis of the implement are inclined from each other in a vertical direction so as to intersect at a point to the rear of the housing at angle between 15 and 25°.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: April 29, 2014
    Assignee: Yamabiko Corporation
    Inventors: Hisato Osawa, Kazuhiro Yoneyama
  • Patent number: 8707542
    Abstract: A power tool for trimming soft materials has a power driver with a drive train engaged with a cylindrical cutter body wherein the power driver rotates the cutter body about its longitudinal axis. A plurality of mutually spaced apart cutter teeth are fixed to an exterior surface of the cutter body. The cutter teeth each have a top surface and a sidewall surface, the sidewall surface extensive between the top surface and an exterior surface of the cutter body. The top surface of each of the cutter teeth is a four-sided convex polygon and the sidewall surface includes four mutually discrete surfaces corresponding to the sides of the polygon, with each of said discrete surfaces extending between the top surface and the cutter body.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: April 29, 2014
    Assignee: Schmidt & Dirks Designs, Inc.
    Inventors: Jay Dean Dirks, Preston Wayne Schmidt
  • Patent number: 8701792
    Abstract: The invention relates to a pre-assemblable arrangement of elements, in particular a tool arrangement or hand tool arrangement, wherein the arrangement exhibits at least one intake manifold (1), a filter floor (2) and/or a carburetor (3), preferably with a carburetor wall (4), wherein a holding structure (7) is additionally provided to accommodate actuating elements (9, 10) or to form a handle (8).
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: April 22, 2014
    Assignee: Makita Corporation
    Inventors: Manfred Doring, Carsten Ziegs