With Guide Bar For Cutting Span Patents (Class 30/383)
  • Patent number: 11358268
    Abstract: A housing for power tools such as chainsaws, blowers, trimmers or hedge trimmers. The housing has a front end, at which a tool of the power tool is attached. The housing further includes a rear end and a top side. A battery compartment is provided at the top side of the housing and extends inside the housing and has a shape adapted to receive a battery. The shape is essentially cuboidal and has a rectangular cross section looking at the top side of the housing. The short sides of the rectangular cross section are substantially parallel with the rear end and the front end of the housing.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: June 14, 2022
    Assignee: Globe (Jiangsu) Co., Ltd.
    Inventor: Thomas Arnell
  • Patent number: 11338426
    Abstract: The cordless power cutter that is lightweight and weight-balanced between a power section housing a battery pack as a power source and a cutting section including a motor in a belt-free drive system and rotatable disk blade. The weight balancing of the cordless power cutter allows the tool to remain parallel to a horizontal surface, such as the ground, without tilting, when the operator lifts and holds the tool by only a gripping or transverse portion of the lifting handle. The motor has a motor axis that is not perpendicular to the disk axis and that is rearward of the disk axis to provide a depth of cut. The weight-balance and motor positioning allows the cordless power cutter to achieve ease of handling and operation.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: May 24, 2022
    Assignee: Black & Decker, Inc.
    Inventor: Scott M. Rudolph
  • Patent number: 11104026
    Abstract: A chainsaw (100) includes a power unit and a working assembly powered responsive to operation of the power unit. The working assembly includes a guide bar (120) around 5 which a chain (210) is rotatable. The guide bar (120) includes first and second side plates (400, 410), a core (420) and a tension indicator (240). The first and second side plates (400, 410) each face other and extend away from a housing (110) to a nose. The core (420) is disposed between the first side plate (400) and the second side plate (410). The tension indicator (240) is provided at the core (420) and is visible at at least one of the first side plate 10 (400) or the second side plate (410). The tension indicator (240) is configured to indicate a chain tension based on a position of the guide bar (120).
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: August 31, 2021
    Assignee: HUSQVARNA AB
    Inventor: Jörgen Johansson
  • Patent number: 11090741
    Abstract: A high efficiency saw chain for a saw including a cutting link and a drive link, the cutting link and a drive link selected to provide a high efficiency saw chain for a specified power range, based on ratios of components of the chain, such as the ratio of the height of the cutter to the pitch of the chain.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: August 17, 2021
    Assignee: Oregon Tool, Inc.
    Inventors: Roberto de Jesus Torres Delgado, James Matthew Cunnington, Sam Hutsell, Michael D. Harfst
  • Patent number: 10661426
    Abstract: It is an object of the invention to provide a more rational vibration reducing technique for a work tool. A representative work tool 100 has an outer housing 102, an inner housing 104, a brushless motor 115, a spindle 124 having a rotation axis extending in parallel to a rotation output shaft of the brushless motor 115 and configured to be rotated on the rotation axis within a prescribed angular range to drive a tool accessory 145, a front elastic member 110a disposed between a front inner housing region 104a and a front outer housing region 102a, and a rear elastic member 110c disposed between at least one of an intermediate inner housing region 104b and a rear inner housing region 104c and at least one of an intermediate outer housing region 102b and a rear outer housing region 102c.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: May 26, 2020
    Assignee: MAKITA CORPORATION
    Inventor: Yonosuke Aoki
  • Patent number: 10532484
    Abstract: A motorized chain saw has a measuring system for measuring an object, in particular a trunk. The motorized chain saw has a saw chain, and the measuring system has an evaluation device. The measuring system includes a sensor system for capturing the movement of the saw chain as the saw chain rolls over an object to be measured. The evaluation device is configured to evaluate the movement of the saw chain captured by the sensor system. In a method for operating the motorized chain saw, the sensor system captures the movement of the saw chain as the saw chain rolls over an object to be measured, and the evaluation device evaluates the captured movement.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: January 14, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Johannes Meier, Patrick Russ, Harald Mang, Tommy Roitsch, Simon Jug, Sven Mueller, Philipp Sandbuehler
  • Patent number: 10376973
    Abstract: A chainsaw includes a housing, a prime mover, a transmitting member and a bias assembly. The prime mover is mounted to the housing. The saw chain is driven by the prime mover. The guide bar guides the saw chain and the guide bar is slidably connected to the housing. The driving member drives the guide bar to slide relative to the housing. The operating member swings forth and back relative to the housing. The transmitting member enables the driving member to rotate synchronously with the operating member when the operating member is swung forth and enables the operating member to rotate relative to the driving member when the operating member is swung back. The bias assembly biases the transmitting member to engage with the operating member when the operating member is swung forth.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: August 13, 2019
    Assignee: CHEVRON (HK) LIMITED
    Inventors: Fangjie Nie, Huixing Fu, Wen Chang
  • Patent number: 10167824
    Abstract: An air cleaner includes: a frame member equipped at an intake port of a carburetor and provided with an air inlet port; a filter held by a holding part included in the frame member; a lid member configured to cover a front face of the filter; and a screw with a knob, the screw being configured to connect the frame member and the lid member together. The frame member is provided with an insertion hole, where the screw with the knob is inserted, on the outer side of the holding part. The lid member includes a part to be connected, to which the screw with the knob is connected, the screw being inserted into the insertion hole from a side close to the carburetor. A knob part of the screw with the knob is disposed on the inner side of a circumscribed line between the lid member and the engine.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: January 1, 2019
    Assignee: Yamabiko Corporation
    Inventor: Takeshi Maeno
  • Patent number: 9993937
    Abstract: A power tool has a tool unit arranged between housing and housing cover. A stud bolt secured on the housing projects through a cover opening to the exterior. A support sleeve of the housing cover is provided with the cover opening and with a support surface for a fastening element screwed onto the stud bolt to secure the housing cover on the housing. The fastening element has a first section arranged at the cover exterior and delimited by a circumferential contour with flats. A maximum radial distance of the outer circumference of the support sleeve relative to the longitudinal center axis of the stud bolt at the support surface and at an adjoining first section of the support sleeve is at most as large as half the width across flats of the fastening element; a tool engaging the flats thus fits across the first section of the support sleeve.
    Type: Grant
    Filed: January 31, 2016
    Date of Patent: June 12, 2018
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Günter Wolf, Friedrich Hollmeier, Jörg Bläsi, Thomas Techow
  • Patent number: 9713880
    Abstract: 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.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: July 25, 2017
    Assignee: MAKITA CORPORATION
    Inventors: Koji Haneda, Jiro Oda, Hideaki Sugiura, Daisuke Suzuki
  • Patent number: 9518552
    Abstract: An ignition circuit for a combustion engine has an ignition coil and a control unit for the coil. The coil and the control unit are included in a common component as an ignition module. The module is supplied with voltage by a generator driven by the engine. A spark plug and the coil form a power circuit which includes a line segment to a reference potential outside the module. A sensor detects data of the engine and the output of the sensor is supplied to the module. The sensor is supplied with voltage via a sensor circuit. The sensor circuit and the power circuit use the line segment as a common connection to the reference potential, so that for a defect of the line segment, a missing connection to the reference potential in the high voltage circuit is recognized via the change of the sensor output signals.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: December 13, 2016
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Heiko Daeschner, Arno Kinnen, Ernst Buck
  • Patent number: 9358698
    Abstract: 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.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: June 7, 2016
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Carel Karrar, Klaus-Martin Uhl
  • Patent number: 9079259
    Abstract: A saw blade includes saw teeth arranged along a toothed side. The saw teeth have a pitch that increases from a clamped end of the saw blade to a saw blade tip. The saw teeth include a tooth support and a hard metal tooth joined to the tooth support. The saw teeth have a plurality of tooth supports having the same shape. Larger tooth spaces are provided for the increasing pitch between tooth supports having an identical shape.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: July 14, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Daniel Grolimund
  • Patent number: 9032630
    Abstract: 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.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: May 19, 2015
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventors: Warren Brown, Harry Szommer, Graham Gerhardt
  • 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
  • Publication number: 20150089820
    Abstract: 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.
    Type: Application
    Filed: May 3, 2013
    Publication date: April 2, 2015
    Applicant: JPS TEKNIK AB
    Inventors: John Peter Sorell, Kurt Gunnar Falk
  • Publication number: 20150068048
    Abstract: 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.
    Type: Application
    Filed: August 8, 2014
    Publication date: March 12, 2015
    Inventors: Kazuhiro YONEYAMA, Motohide TERAO
  • Publication number: 20150047491
    Abstract: A guide bar for a saw chain of a chain saw has a fastening section and a redirecting section. The guide bar has an imaginary longitudinal center axis extending from the fastening section to the redirecting section. The guide bar has at least one first marking in the form of a line. The first marking is inclined at an angle of about 20° to about 80° with respect to the longitudinal center axis when viewing the guide bar in side elevation. The first marking is used to estimate, during operation, the depth (t) of a groove produced by the saw chain in the workpiece in the case of a cut in which the longitudinal center axis of the guide bar is inclined at an angle of about 20° to about 80° to the surface of the workpiece.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 19, 2015
    Applicant: Andreas Stihl AG & Co. KG
    Inventor: Guenther Schamberg
  • Publication number: 20150013173
    Abstract: 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.
    Type: Application
    Filed: January 3, 2013
    Publication date: January 15, 2015
    Inventors: Arnold Hug, Urs Karlen, Milan Bozic, Joe Lauber, Ivo Gruber
  • Publication number: 20140345149
    Abstract: 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.
    Type: Application
    Filed: December 25, 2012
    Publication date: November 27, 2014
    Inventors: Yasuo Etou, Satoru Matsuno, Kouji Sagawa, Miyoji Onose, Yasutaka Shimizu, Ai Nakayama
  • Publication number: 20140259700
    Abstract: 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.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: BLOUNT, INC.
    Inventors: Mike Goettel, Michael D. Harfst, Christopher D. Seigneur
  • 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: 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
  • Publication number: 20140250701
    Abstract: 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.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 11, 2014
    Applicant: Andreas Stihl AG & Co. KG
    Inventors: Helmar Amend, Christoph von Hiller, Alexander Fuchs, Christine Rominger, Matthias Schulz, Jonas Lank, Klaus-Martin Uhl
  • 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
  • Publication number: 20140173918
    Abstract: 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.
    Type: Application
    Filed: March 2, 2012
    Publication date: June 26, 2014
    Inventors: Rudolf Fuchs, Petr Grulich, Uwe Engelfried
  • Patent number: 8740529
    Abstract: An arrangement for attaching a bar of a hand-held motor driven tool, such as a chain saw, to a body of the tool includes at least one first engagement device, 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 second engagement device is adapted to engage the first engagement device for securing a bar between the cover portion and the body. The second engagement device is arranged to move a first distance along the first engagement device in a direction of the rotation axis of the second engagement device for securing a bar between the cover portion and the body. The second engagement device is captively attached to a spring biasing member having an undistorted position and a distorted position.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: June 3, 2014
    Assignee: Husqvarna AB
    Inventors: Par Martinsson, Dag Edlund
  • Publication number: 20140123504
    Abstract: 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.
    Type: Application
    Filed: March 2, 2012
    Publication date: May 8, 2014
    Inventor: Rudolf Fuchs
  • 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: 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
  • Publication number: 20140109416
    Abstract: 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.
    Type: Application
    Filed: December 30, 2013
    Publication date: April 24, 2014
    Applicant: HUSQVARNA AB
    Inventor: Par MARTINSSON
  • Publication number: 20140096399
    Abstract: The disclosure relates to a portable power tool comprising at least one coupling device which can be coupled to a power tool separation device comprising at least one cutting unit and at least one guide unit for guiding the cutting unit. The portable power tool comprises at least one storage device which is provided to stow the machine tool separation device at least when it is coupled to the coupling device.
    Type: Application
    Filed: March 2, 2012
    Publication date: April 10, 2014
    Applicant: Robert Bosch GmbH
    Inventor: Rudolf Fuchs
  • Publication number: 20140075765
    Abstract: A machine tool system comprises at least one portable machine tool and at least one separating device for a machine tool, which includes at least one cutting strand and at least one guide unit for guiding the cutting strand, said guide unit forming with the cutting strand a closed system. The machine tool system comprises at least one cutting edge guide unit.
    Type: Application
    Filed: March 2, 2012
    Publication date: March 20, 2014
    Applicant: Robert Bosch GmbH
    Inventor: Rudolf Fuchs
  • Patent number: 8661695
    Abstract: The claimed invention relates to a device in a guide bar (10) for a chain saw. The guide bar (10) comprises at least two layers (11, 12, 13) that are bounded by an adhesive material. To ensure that the layer of adhesive material gets the optimal thickness is one of the surfaces of the layers that will be bounded to each other provided with several protruding parts (17). The protruding parts (17) will generate a slot, with the same width as the height of the protruding parts, for the adhesive material when the layers are put together. This is important to ensure maximum strength in the bounding as well as a constant width of a groove (14) for the saw chain.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: March 4, 2014
    Assignee: Husqvarna AB
    Inventors: Roger Hermansen, John Flaten, Lennart Ekrud, Terje Berget
  • Patent number: 8661694
    Abstract: A portable handheld 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 handheld 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 handheld power tool (1). The receiving device (100) has a receiving portion (110) for receiving and leading the flexible elongated member therethrough. 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 handheld power tool (1) by means of a pivot assembly (4).
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: March 4, 2014
    Assignee: Husqvarna AB
    Inventors: Hugo van Bijsterveldt, Rikard Rydberg, Peter Bjorkman
  • Publication number: 20140053418
    Abstract: A machine tool system comprises at least one machine tool separating device, which has at least one cutting strand and at least one guide unit for guiding the cutting strand, which together form a self-contained system, and at least one portable machine tool, which comprises a machine tool housing and at least one coupling device for coupling the machine tool separating device. The portable machine tool comprises at least one pad unit to be placed on a workpiece, wherein the pad unit and the machine tool housing are mounted such that they can be moved relative to each other.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 27, 2014
    Applicant: Robert Bosch GmbH
    Inventor: Rudolf Fuchs
  • Publication number: 20140053417
    Abstract: A power tool system includes at least one power tool separation device and at least one portable power tool. The power tool separation device includes at least one cutting unit and at least one guide unit which forms a closed system at least together with the cutting unit. The portable power tool includes a motor unit configured to be coupled to the cutting unit of the power tool separation device. At least in the mounted state, a longitudinal axis of the motor unit extends at least essentially perpendicular to the longitudinal axis of the guide unit.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 27, 2014
    Inventor: Rudolf Fuchs
  • Publication number: 20140047722
    Abstract: 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.
    Type: Application
    Filed: August 13, 2013
    Publication date: February 20, 2014
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Miyoji Onose, Ai Nakayama, Seiichi Kodato, Kouji Sagawa, Shinichi Kakefuda
  • Publication number: 20140047723
    Abstract: 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.
    Type: Application
    Filed: August 14, 2013
    Publication date: February 20, 2014
    Applicant: National Institute of Higher Education Research Science and Technology
    Inventor: Maurice Peter VIDALE WADE
  • Publication number: 20140047721
    Abstract: The disclosure relates to a portable machine tool, in particular a hand-held machine tool, comprising at least one coupling device which is designed to be coupled to a machine tool separation device having at least one cutting unit and at least one guide unit for guiding the cutting unit. According to the disclosure, the portable machine tool comprises at least one machine tool stabilizing device which comprises, in an area outside the coupling device, at least one stabilizing element having at least one support surface for stabilizing the machine tool separation device.
    Type: Application
    Filed: March 2, 2012
    Publication date: February 20, 2014
    Applicant: Robert Bosch GmbH
    Inventor: Rudolf Fuchs
  • Patent number: 8627572
    Abstract: A chainsaw having a brake arrangement comprising: a kickback brake drum (10) arranged to rotate together with a drive sprocket driving a saw chain of a chainsaw, a kickback brake for quickly stopping the saw chain if at least one kickback actuator (7) is actuated, the kick back brake including a kickback brake band (11) extending around the kickback brake drum (10) and means for tightening the kickback brake band (17-19, 22) around the kickback brake drum (10), and; a coasting brake weaker than the kickback brake being arranged to brake the saw chain (2) unless a coasting actuator of the chainsaw is actuated, the coasting brake includes a coasting brake band extending around a coasting brake drum (10) arranged to rotate together with the drive sprocket (37), and means for tightening the coasting brake band (20, 22, 23) around the coasting brake drum, wherein the coasting brake band is either at least one longitudinally slit portion (11b) of the kickback brake band or a separate brake band.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: January 14, 2014
    Assignee: Husqvarna AB
    Inventors: Par Martinsson, Lars Andersson, Thomas Engman, Bjorn Rosberg
  • Patent number: 8615890
    Abstract: A chain saw includes a guide bar for a saw chain, a housing, a sprocket wheel cover, and a stud fixed on the housing for threadably fastening the sprocket wheel cover and the guide bar. The free thread end of the stud has a maximum usable screw-in depth (tmax) for a nut. A stop for the sprocket wheel cover having a stop surface as well as a support surface for contact engaging the stop surface are provided. In the mounted state of the guide bar, a distance (a) remains between the stop surface and the support surface. The support surface contact engages the stop surface when the guide bar is removed and the nut is tightened and screwed onto the studs to a stop screw-in depth. The stop is configured in such a manner that the maximum usable screw-in depth (tmax) is greater than the stop screw-in depth.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: December 31, 2013
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Günter Wolf, Maximilian Eberhardt, Wolfgang Weissert
  • Patent number: 8615889
    Abstract: 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.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: December 31, 2013
    Assignee: Husqvarna AB
    Inventor: Par Martinsson
  • Patent number: 8601919
    Abstract: A method of applying frictional braking to motion of a cutter providing chain thereof, involving the entering of an insertional element into the chain channel guide.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: December 10, 2013
    Inventor: William C. King
  • Publication number: 20130318802
    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: Application
    Filed: October 12, 2012
    Publication date: December 5, 2013
    Inventors: Ulrich Kapinsky, Helmut Zimmermann, Jochen Oerding
  • Patent number: 8595943
    Abstract: A chainsaw (100) has a chainsaw body (101), a cutting chain (103) driven by a motor, and a guide bar mounting stud (111) extending from the chainsaw body (101). The chainsaw (100) also has an adjustably connected guide bar (102) having a track for supporting the cutting chain (103) around a periphery of the guide bar (102) and an adjustment pin (114) extending from a side face thereof. The guide bar mounting stud (111) is configured to extend through an elongated slot (112) in the guide bar (102). The chainsaw (100) also has a cam (116) received on the guide bar mounting stud (111) and having an eccentric groove facing the guide bar (102). The adjustment pin (114) is received in the eccentric groove such that rotation of the cam (116) causes the guide bar (102) to move with respect to the chainsaw body (101), thereby tensioning the cutting chain (103).
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: December 3, 2013
    Assignee: MTD Products Inc
    Inventors: Jeremy L. Buttery, Robert M. Shymkus, Delbert E. Lucas, Robert Atchley
  • Publication number: 20130180118
    Abstract: 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.
    Type: Application
    Filed: January 11, 2013
    Publication date: July 18, 2013
    Applicant: HITACHI KOKI CO., LTD.
    Inventor: HITACHI KOKI CO., LTD.
  • Publication number: 20120279074
    Abstract: 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.
    Type: Application
    Filed: July 11, 2012
    Publication date: November 8, 2012
    Inventor: Brian J. Ruth
  • Patent number: RE46182
    Abstract: A filter device for filtration of gaseous fluids has a multi-part housing with a first housing part and a second housing part connected to one another in a mounted state of the multi-part housing. A filter element is insertable into the multi-part housing. A connecting device penetrates the filter element and provides a connection between the first and second housing parts. The connecting device has at least one first housing projection monolithically formed on the first housing part. The connecting device further has a damping element arranged between the at least one first housing projection and the second housing part.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: October 25, 2016
    Assignee: MANN+HUMMEL GMBH
    Inventors: Andreas Weber, Timo Dirnberger