Rotary Blade Patents (Class 30/276)
  • Patent number: 11272657
    Abstract: A strand trimmer and method of use thereof. The strand trimmer includes a pair of pivotable arms each having a motor, a follower wheel, and a cutter-spindle assembly disposed thereon. The arms are biased toward one another and are guided by the follower wheels to pivot around obstacles passing between the arms. The motor rotates the cutter-spindle assembly to move cutting strands extending therefrom through a cutting path with sufficient rotational velocity to cut vegetation. The cutter-spindle assembly includes a reloadable spool and a strand-feed mechanism. The strand-feed mechanism includes a solenoid actuated plunger within a shaft of the cutter-spindle assembly which operates to non-contactingly actuate the plunger to feed out a length of strand. The solenoid is non-rotatably carried on the trimmer arm while the shaft of the cutter-spindle assembly is encircled by and rotated within the solenoid.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: March 15, 2022
    Assignee: Trimverse LLC
    Inventors: Robert Simmons, Mark T. Hamann, Royce M. Peters
  • Patent number: 11252866
    Abstract: A universal stringer head assembly including a cylindrical housing with an interior diameter with the geometry of a cone or wedge with a plurality of orifices passing from the exterior surface to the interior surface. Each orifice is sized and shaped to receive a fastener therethrough. Ideally, at least three orifices are equally spaced about the external circumference of the housing, facilitating the rotatable attachment of at least three fasteners to the rotatable shaft of an associated piece of lawn equipment, for example an edge trimmer.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: February 22, 2022
    Inventor: Richard Lang
  • Patent number: 11252868
    Abstract: A landscape trimming tool attachment device for creating circular and uniform tree wells is made up of a curved tree collar, a substantially linear extension section, and an attachment means for attaching the attachment device to a landscape trimming tool.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: February 22, 2022
    Assignee: TREE WELL WIZARD, LLC
    Inventor: Jon C. Keating
  • Patent number: 11246624
    Abstract: The broach or rasp holder tool with reduced rasp moment includes an angled strike plate with an optional curved or spheroidal surface and/or an angled withdrawal plate having a contact surface for receiving a generally perpendicular strike force that generally aligns with a point along a rasp for substantially eliminating a moment applied thereto while broaching the intramedullary canal in preparation for implanting a prosthetic stem during joint replacement surgery.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: February 15, 2022
    Assignee: Joint Development, LLC
    Inventors: James T. Grutta, Dermott J. McHugh, Chris A. Weaber
  • Patent number: 11229160
    Abstract: A trimmer head for a trimmer having a shaft defining a rotation axis is provided. The trimmer head includes a housing including a main housing and a lower cover, wherein the main housing contains a pair of opposed eyelets through which trimmer line is discharged. A spool is encased within the housing, with a bump knob connected thereto, and has a passageway with opposed ends and extending from one side of the spool to another, the opposed ends being alignable with the eyelets to receive the line. A first set of ramps is located on an inside surface of the main housing and a second set of ramps is located within a center barrel of the spool. The two sets of ramps interact to control the direction of releasing line from the trimmer head and forcing indexing of the spool when the bump knob is bumped.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: January 25, 2022
    Assignee: SHAKESPEARE COMPANY, LLC
    Inventor: David Skinner
  • Patent number: 11219159
    Abstract: A grass trimmer includes a cutting head for mounting a cutting member, a drive head having a output shaft for driving the cutting head to rotate, and an anti-winding member for preventing the output shaft from being wound to by grass. The drive head includes a drive device to drive the output shaft and a head housing for accommodating the drive device. The output shaft connects to the cutting head and passes through the anti-winding member and the anti-winding member is mounted to the cutting head so as to rotate with the cutting head and is disposed between the cutting head and the head housing so as to fill the space between the cutting head and the head housing.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: January 11, 2022
    Assignee: Chervon (HK) Limited
    Inventors: Feng Yuan, Ming Peng, Jianpeng Guo, Zichun Tang
  • Patent number: 11203141
    Abstract: A single-cavity multi-runner applied to oriented arrangement extrusion molding equipment of graphene fibers includes a first extrusion cavity, the first extrusion cavity includes a first inlet and a first outlet arranged opposite to each other; a first molding cavity, the first molding cavity is arranged in an inclined manner, a second inlet is arranged at the high position end, a second outlet is arranged at the low position end of the first molding cavity, and the second inlet is connected to the first outlet; flow channels, the flow channels are formed by dividing the first molding cavity using baffle plates arranged horizontally and along the flowing direction of a heat-conducting mixture; a second molding cavity, the second molding cavity includes a third inlet and a third outlet arranged opposite to each other, the third inlet is connected to the outflow end of the flow channels.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: December 21, 2021
    Assignees: Suzhou Kanronics Electronic Technology CO., LTD., Shenzhen HanHua TM Technology Co., LTD.
    Inventors: Mars Guo, Daniel Huang, Wenbin Chen, William Yang
  • Patent number: 11171542
    Abstract: A power tool comprising a housing, a motor, and a circuit board residing in the housing is provided. A rectifier that receives an alternating current and converts the alternating current to a direct current, a switching arrangement having a plurality of motor switches connected electrically between the rectifier and the motor, and a capacitor connected electrically between the rectifier and the switching arrangement, are mounted on a rear portion of a planar surface of the circuit board. A switching arrangement and at least one heat sink in thermal communication therewith are mounted on a front portion of the planar surface of the circuit board.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: November 9, 2021
    Assignee: Black & Decker Inc.
    Inventors: John C. Vanko, Michael K. Forster, Matthew J. Velderman, John Howson
  • Patent number: 11140822
    Abstract: A rotary head for brush cutters with a lower shell on which cutting means and a ring nut are hinged, the latter being coupled to the lower shell and movable in relation to the lower shell from a first working configuration to a second blade-change working configuration, and vice versa; the rotary head having positioning means for interference fitting said ring nut in a predetermined angular position relative to said lower shell.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: October 12, 2021
    Assignee: FLASHCUTTER S.R.L. CON UNICO SOCIO
    Inventor: Lauro Guerra
  • Patent number: 11122735
    Abstract: A spool and a trimmer head. The trimmer head includes a housing defining a cavity and rotatable about an axis. A spool is supported in the cavity and operable to support line to be dispensed. The spool is movable along the axis relative to the housing, and the spool and the housing define cooperating conical surfaces to center the spool during movement of the spool toward and in a position relative to the housing.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: September 21, 2021
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Beth E. Cholst, Troy C. Thorson
  • Patent number: 11109530
    Abstract: The trimmer head (1) includes a housing (3) and a spool (5) that can be housed in the housing. A pair of ring members (35A, 35B) with teeth inclined at opposite inclinations can be selectively coupled to the head, to engage the trimmer head (1) in combination with trimmer apparatuses having engine that rotates selectively in a clockwise or anticlockwise direction.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: September 7, 2021
    Assignee: ARNETOLI MOTOR S.R.L.
    Inventor: Fabrizio Arnetoli
  • Patent number: 11097353
    Abstract: A power tool has a clamping mechanism having an assembling mount and two clamping blocks. The assembling mount has a main body, a receiving recess defined in the main body, two first limiting troughs communicating with the receiving recess, and a through hole defined through a bottom of the receiving recess. The two clamping blocks are disposed in the receiving recess. Each one of the two clamping blocks has an abutting face corresponding to the bottom of the receiving recess in shape and facing to the bottom of the receiving recess. One of the two clamping blocks has two limiting ribs respectively inserted in the two first limiting troughs. The two limiting ribs respectively guided and blocked by the two first limiting troughs to prevent the clamping block from sliding downward along the bottom of the receiving recess.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: August 24, 2021
    Assignee: TECHWAY INDUSTRIAL CO., LTD.
    Inventors: Chih-Hua Hsu, Chen-Chen Cheng, Yung-Chiang Chen
  • Patent number: 11089725
    Abstract: A grass trimmer includes a grass cutting head and a driving mechanism. The grass cutting head includes a head housing, a spool, and a clutch mechanism. The clutch mechanism is configured to implement power transmission between the head housing and the spool. The clutch mechanism includes an elastic member which is elastically deformable.
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: August 17, 2021
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventor: Fangjie Nie
  • Patent number: 11089724
    Abstract: A grass trimmer includes a trimming head, a driving device for driving the trimming head to rotate so as to cut vegetation and an operating device for a user to operate so as to control the driving device. The trimming head includes a spool and a line holding member, the spool is used to wind a cutting line, and the line holding member is formed with a line holding structure. The driving device includes a motor. The grass trimmer has an auto-winding mode. In the auto-winding mode, the motor drives at least one of the spool and the line holding member to make the spool and the line holding member rotate relatively so that the cutting line is wound on the spool automatically.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: August 17, 2021
    Assignees: Nanjing Chervon Industry Co., LTD., Chervon (HK) Limited
    Inventors: Jianpeng Guo, Maohui Li, Fangjie Nie, Toshinari Yamaoka
  • Patent number: 11027408
    Abstract: A powered tool device may include a first handle grip coupled to a first handle bar and a second handle grip coupled to a second handle bar. A first battery may be coupled to the first handle bar, and a second battery may be coupled to the second handle bar. The two handle bars, handle grips, and their respective batteries may be separated from each other via a separation structure that may separate the two handle bars by a distance which may allow portions of the body of a user to be between the handle bars. Optionally, the separation structure may be moved between an extended position and a compacted position.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: June 8, 2021
    Inventor: Jonathan Rizzo
  • Patent number: 11024916
    Abstract: The battery housing assembly, connected to a support shaft assembly of a string trimmer, includes a base housing member defining a chamber configured to receive a battery therein. The base housing member includes a frontal member configured to engage a front of the battery, a top member extending from the frontal member, configured to engage the top portion of the battery, and a bottom member, configured to engage a bottom portion of the battery. A first side member is configured to be removably connected to a first side of the base housing member; and a second side member configured to be removably connected to a second side of the base housing member.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: June 1, 2021
    Assignee: Stanley Black & Decker, Inc.
    Inventors: Mark D Miller, Brian Poole, John Palermo, Michael Cannaliato, Robert B Schoch
  • Patent number: 11006575
    Abstract: An arrangement includes an output shaft, a cutting head, at least one cutting tool arranged on the cutting head, and a hood. The cutting head is mounted on the output shaft by a screw element held in a rotationally fixed manner on the cutting head. The hood is held on the output shaft in a rotationally fixed manner, and has ribs in the inner region, and a first grip region in the outer region.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: May 18, 2021
    Assignee: ANDREAS STIHL AG & CO. KG
    Inventor: Achim Rethaber
  • Patent number: 10960564
    Abstract: A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body includes an outer wall including an arcuate surface having an upper region extending from a first upper end portion to a second intermediate portion and a lower region extending from the second intermediate portion to a third lower end portion. A plurality of gear teeth extend downwardly from the upper end of the body, each of the plurality of gear teeth including an outer peripheral face forming a portion of the upper region of the arcuate surface of the outer wall. The body outer wall includes a bearing surface having a lower bearing face in the lower region of the arcuate surface and an upper bearing face in the upper region of the arcuate surface.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: March 30, 2021
    Assignee: Bettcher Industries, Inc.
    Inventor: Jeffrey A. Whited
  • Patent number: 10952371
    Abstract: Disclosed is a four-line nylon cutter assembly for a mower, including: an upper case having an insert groove at a central portion thereof; an elastic body in which one surface portion is in close contact with an inner surface of the central portion of the upper case; a spool having a surface on which a nylon cutter is wound and one surface which is in close contact with the other surface portion of the elastic body by pressing; an operating wheel of which one surface portion is coupled to the other surface portion of the spool; and a lower case in which a mounting groove into which the other side portion of the operating wheel is inserted is formed at the center portion and an edge portion is coupled to an edge portion of the upper case.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: March 23, 2021
    Assignee: TWOY. CO. LTD.
    Inventor: Yun Cheol Shin
  • Patent number: 10953533
    Abstract: A manually guided implement possesses a guide tube, wherein a first mass body is disposed on a first end of the guide tube, and a second mass body is disposed on a second end of the guide tube. One of the mass bodies has a housing, and the other of the mass bodies has a tool driven by a drive motor. A power transmission mechanism for driving the tool between the first and second ends of the guide tube is guided in the interior of the guide tube. A first antivibration element is disposed between the first end of the guide tube and the first mass body. The guide tube in the direction of the longitudinal central axis thereof includes a first rigid sub-portion and a second rigid sub-portion that are connected to one another at an abutment location by at least one second antivibration element.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: March 23, 2021
    Assignee: ANDREAS STIHL AG & CO. KG
    Inventors: Johannes Menzel, Tobias Wörner, Simone Pelludat, Samir Siam, Marc Schmid
  • Patent number: 10939613
    Abstract: The invention provides a grass trimmer and a cord delivering method for a grass trimmer, the grass trimmer includes an extending rod, an housing, a grass trimming head, a handle, a main motor and a main switch, wherein the grass trimming head includes a base, a cap and a spool having a first state relative static with the base, and the grass trimmer further includes a cord delivering mechanism; the cord delivering mechanism includes a cord delivering electronic switch independent of the main switch and a control device; and the cord delivering electronic switch operably electrically controls the control device to enable the spool to be in a second state capable of generating a rotary speed difference with the base. An operator does not need to interrupt work of the grass trimmer and can timely pay off required and the cord delivering operation is simple and convenient.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: March 9, 2021
    Assignee: Positec Power Tools (Suzhou) Co., Ltd.
    Inventors: Yichun Ma, Shisong Zhang, Guoliang Mou, Hongfeng Zhong, Fangshi Liu, Xiaoli Pang, Robert Baker, Brandon Martin
  • Patent number: 10939614
    Abstract: A trimmer head for use with a handheld lawn maintenance tool is shaped in a hub-and-spoke manner, wherein the trimmer head includes a housing formed of a hub, a circular rim, and a plurality of spokes extending therebetween. A spool is positioned within the hub, and a pair of pieces of trimmer line are inserted into opposing sides of the circular rim through the spokes for winding onto the spool. The trimmer line extends outwardly from the housing at a location spaced away from the hub.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: March 9, 2021
    Assignee: MTD PRODUCTS INC
    Inventors: Cory Bringhurst, Jeffrey Kucera
  • Patent number: 10926427
    Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: February 23, 2021
    Assignee: Bettcher Industries, Inc.
    Inventors: Jeffrey A. Whited, Dennis R. Seguin, Jr., Bernard J. Esarey
  • Patent number: 10918015
    Abstract: A trimmer head arranged to be driven to rotate a trimmer line, where the trimmer head includes a housing and an inner body connected to a trimmer line spool. The inner body is arranged to be movable relative the housing so that a trimmer line spooled around the trimmer line spool is released and pulled out by a centrifugal force caused by the rotation of the trimmer head, thereby allowing feed of the trimmer line. The trimmer further includes drive means for driving the trimmer head to rotate, and the trimmer is arranged to cause a relative movement of the inner body relative the housing by changing the rotation speed of the trimmer head.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: February 16, 2021
    Assignee: HUSQVARNA AB
    Inventors: Johan Hallendorff, Tomas Wykman, Stefan Kullberg, Rickard Skogward
  • Patent number: 10889018
    Abstract: A rotary knife includes a rotatable annular blade. The blade includes a blade wall presenting an annular inner surface terminating at a cutting edge. The annular inner surface includes a first section and a second section, with the first section extending from the cutting edge and the second section being located further from the cutting edge than the first section. The first and second sections define first and second angles, respectively, relative to an imaginary plane transverse to the axis about which blade rotates. The second angle is greater than the first angle.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: January 12, 2021
    Inventor: Clark A. Levsen
  • Patent number: 10874046
    Abstract: A hand-held cutting device (10) including an elongated member (45), a trimmer head (25), and a power unit operably coupled to the trimmer head (25) to selectively cause rotation of the trimmer head (25). The trimmer head (25) includes a line holding assembly (110, 310) to hold and selectively release trimmer line (70), and a housing to house the line holding assembly (110, 310), wherein the line holding assembly (110, 310) includes a core (140, 340), a line-release knob (160, 350), and a spool (130) configured to hold the trimmer line (70). The knob (160, 350) is axially movable with respect to the core (140, 340) between an extended first position and a retracted second position, the knob (160, 350) extending outwardly from the housing and being non-rotatably fixed to the core (140, 340) when the knob (160, 350) is in the first position.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: December 29, 2020
    Assignee: HUSQVARNA AB
    Inventors: Stefan Kullberg, Anders Hansson
  • Patent number: 10874048
    Abstract: A trimmer can be converted from an existing cutting medium to an alternative tool without requiring removal of the trimmer head. A common upper receiver head, as sold by an original equipment trimmer manufacturer, incorporates design provisions to snugly allow an easy/comfortable fit for a series of uniquely adaptable and convertible cap attachments such as, monofilament systems, unique molded or shaped flexible line blades with optional cutting swath diameters, as well as other helpful devices that perform different functions beyond just cutting grass.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: December 29, 2020
    Assignee: AERO-FLEX TECHNOLOGIES, INC.
    Inventor: Vincent D. Morabit
  • Patent number: 10856466
    Abstract: A grass trimming head includes a housing assembly and a spool. The housing assembly is formed with a housing cavity and an outer aperture for allowing a cutting line to be inserted from an outside of the housing assembly into the housing cavity. At least a portion of the spool is arranged inside the housing cavity, and the spool is rotatable with respect to the housing assembly about a central axis. The spool is formed with an inner aperture for allowing the cutting line to be inserted into the spool or a clamping portion configured to fix the cutting line.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: December 8, 2020
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventors: Jianpeng Guo, Toshinari Yamaoka, Fangjie Nie, Qi Zhang, Zongjing Li, Fei Wang, Lanxi Xu
  • Patent number: 10849268
    Abstract: A grass trimmer includes a trimming head, a driving device for driving the trimming head to rotate so as to cut vegetation, and an operating device for use in controlling the driving device. The trimming head includes a spool and a line holding element formed with a line holding structure. The driving device includes a motor. The grass trimmer has an auto-winding mode. In the auto-winding mode, the motor drives at least one of the spool and the line holding element to make the spool and the line holding element rotate relatively so that a trimming line is wound on the spool automatically.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: December 1, 2020
    Assignees: Nanjing Chervon Industry Co., Ltd., CHERVON (HK) LIMITED
    Inventors: Jianpeng Guo, Maohui Li, Fangjie Nie, Toshinari Yamaoka
  • Patent number: 10820497
    Abstract: A mowing head for a trimmer is rotated about an axis of rotation when operated and has a housing with a circumferential wall. A fastening device with a trimmer line guide with a trimmer line channel is provided for the trimmer line. The trimmer line channel has a clamping section with a longitudinal direction. The clamping section has a wide longitudinal side and a narrow longitudinal side, both extending in the longitudinal direction. The clamping section has an inner width tapering from the wide longitudinal side toward the narrow longitudinal side. The trimmer line guide has a deflection edge adjoining the clamping section. The deflection edge is slanted relative to the longitudinal direction such that the deflection edge generates a force component acting on the trimmer line directed toward the narrow longitudinal side when a pulling force is acting on the trimmer line guided through the fastening device.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: November 3, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: Achim Rethaber
  • Patent number: 10786919
    Abstract: A rotary knife includes a frame, an annular blade, and a blade housing mounted to the frame. The housing presents a circumferential mounting surface in contact with the frame. The housing supports the blade on the frame for rotation about a central axis. The housing includes a blade-supporting race defined along a circle centered on the central axis. The mounting surface is defined along a circular arc with a center point spaced from the central axis, such that the blade-supporting race and mounting surface are eccentric relative to one another. The housing presents opposite inner and outer annular faces. At least one of the faces presents a proximal-most end in contact with the frame and a distal-most end spaced from the frame. The proximal-most end is spaced from the central axis a first distance. The distal-most end is spaced from the central axis a second distance. The distances are different.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: September 29, 2020
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Patent number: 10779466
    Abstract: A cutter head for a brushcutter has a base member with top and bottom base member parts and rotates about an axis of rotation in operation. The top base member part is fixed to the brushcutter shaft end. The bottom base member part is screwed by a screw element to the shaft end. A bearing element is arranged in the base member radially spaced to the axis of rotation. A cutting tool is secured by the bearing element to the base member between top and bottom base member parts. The bearing element is secured either to bottom or top base member part and arranged relative to the other one such that the bearing element is constructively unhindered to move relative to the other base member part at least circumferentially and such that the bottom base member part for mounting or demounting is rotatable relative to the top base member part.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: September 22, 2020
    Assignee: Andreas Stihl AG & Co. KG
    Inventor: David Günther
  • Patent number: 10772258
    Abstract: Provided is a portable brush cutter with reduced weight and size due to its simple structure with a small number of components that is capable of improving durability and the like as well as effectively suppressing torsional vibration of a transmission shaft. In the portable brush cutter, a one-way clutch to prevent generation of torsional vibration in a rotation transmission path is interposed between an output shaft and a transmission shaft, and bearings are adjacently mounted on the opposite sides of the one-way clutch.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: September 15, 2020
    Assignee: YAMABIKO CORPORATION
    Inventor: Mikio Sugiyama
  • Patent number: 10718243
    Abstract: The temperature of exhaust gas discharged from a compact air-cooled engine used as a power source for an engine-driven working machine is reduced. An engine has a muffler mounted directly to the exhaust opening of the cylinder, and a resin muffler cover covering the muffler. An exhaust gas restriction member is provided to a wall surface of the muffler, and two exhaust passages serving as outlets for exhaust gas are formed in the exhaust gas restriction member. The exhaust passages are arranged independent of each other, and the streams of discharged exhaust gas are discharged to be slightly separated from each other as the streams flow away from the exhaust openings. The separated streams of discharged exhaust gas form a negative pressure space between the streams promoting the introduction of a cooling air stream into the negative pressure portion. Thus, the temperature of the exhaust gas can be reduced.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: July 21, 2020
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Naoto Ichihashi, Youhei Kinugawa
  • Patent number: 10716253
    Abstract: A flexible line trimmer head has a housing with first and second parts and a spool for a supply of line. The first and second housing parts are configured to be moved from a spaced relationship towards each other along an operating axis whereupon cooperating connectors engage to block movement of the first and second housing parts away from each other along the axis. The cooperating connectors are provided in pairs at at least three different locations each spaced radially from the operating axis and in a circumferential direction from the other locations.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: July 21, 2020
    Assignee: ECHO INCORPORATED
    Inventors: Joseph John Zenkus, Stephen J. Towner, Ryan Garrett
  • Patent number: 10709062
    Abstract: The invention is a multi-tiered line trimmer and shredder apparatus using a number of individual pre-molded or pre-cut nail head string lines. Whenever the engine or motor is running, the apparatus rotates the nail head string lines generating cutting power designed to utilize multiple functions, such as trimming grass or weeds, clearing vegetation by shredding or mulching it, or removing snow. The apparatus consists of a base, cylindrical body, nail head string lines, and cover. The base attaches to a drive shaft or directly to an engine or motor. The cylindrical body is hollow, has holes throughout its wall that may be the same or variable sizes. The nail head string lines are inserted into the holes. The cover is used to cover the cylinder body, and to secure the “nail head” portion of the nail head string lines within the cylindrical body while the apparatus is in use.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: July 14, 2020
    Inventor: Michael Ting-Kao Chang
  • Patent number: 10645871
    Abstract: The grass cutting head (1), configured for rotation around a rotation axis, comprises a housing (3) for a cutting line (F); a space (5) inside the housing for winding a stock of cutting line; at least one hole (3B) in a side wall (3A) of the housing (3), through which the cutting line (F) passes from the inner space (5) towards the outside of the housing; At least one cutting blade (21) with at least one cutting edge (23) is associated with the housing (3) of the grass cutting head (1).
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: May 12, 2020
    Assignee: ARNETOLI MOTOR S.R.L.
    Inventor: Fabrizio Arnetoli
  • Patent number: 10612229
    Abstract: A drain cleaner including a carrier configured to be carried by a user, a cable configured to be inserted into a drain, a drum positioned and rotatable within the carrier, the drum supporting the cable, a motor positioned within the carrier and operable to rotate the drum, and a cable feed control mechanism coupled to the motor to control operation of the motor. The cable feed control mechanism is configured to feed the cable out of the drum and is positioned at a distance from carrier so a length of the cable extends from the drum to the cable feed control mechanism. The cable feed control mechanism is configured to be carried by the user separately from the carrier.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: April 7, 2020
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Justin Miller, Ryan James Denissen
  • Patent number: 10575464
    Abstract: A fixed-line trimmer head for a rotary trimmer device includes the upper portion having a periphery, wherein the upper portion has a plurality of openings spaced from the periphery; and a plurality of mechanisms. Each mechanism can hold a strip of line and includes a post portion disposed through one of the openings in the upper portion, and a flange disposed at one end of the post portion and sandwiched between the upper portion and lower portion of the trimmer head to prevent vertical movement of the mechanism. The post portion includes two line channels, each line channel defining a passageway to receive the same strip of line, wherein at least one of the line channels is curved such that any portion of the strip of line being received through the passageway of that line channel is bent at that portion of the strip of line away from the second line channel while passing through that at least one line channel that is curved.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: March 3, 2020
    Assignee: Shakespeare Company, LLC
    Inventors: David B. Skinner, Wen Liu
  • Patent number: 10576649
    Abstract: A rotary knife includes a rotatable annular blade. The blade includes a blade wall presenting an annular inner surface terminating at a cutting edge. The annular inner surface includes a first section and a second section, with the first section extending from the cutting edge and the second section being located further from the cutting edge than the first section. The first and second sections define first and second angles, respectively, relative to an imaginary plane transverse to the axis about which blade rotates. The second angle is greater than the first angle.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: March 3, 2020
    Inventor: Clark A. Levsen
  • Patent number: 10568260
    Abstract: A trimmer head housing having a first part and a second part. The first and second housing parts are configured to be changed between: a) a first state wherein the first and second housing parts are separated from each other; and b) a second state wherein the housing parts are operatively connected to be movable together around an operating axis. The operatively connected housing parts are configured to support at least one cutting component that is configured to effect cutting as the operatively connected housing parts are turned around the operating axis. The trimmer head housing has interacting parts cooperating between the first and second housing parts and configured to allow the first and second housing parts to be operatively connected with the first and second housing parts in only a single angular relationship with respect to the operating axis.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: February 25, 2020
    Assignee: ECHO INCORPORATED
    Inventors: Joseph John Zenkus, Stephen J. Towner, Ryan Garrett
  • Patent number: 10569441
    Abstract: A vacuum rotary knife is fluidly connectable to a vacuum source conduit. The rotary knife includes an annular blade and a knife head. The knife head supports the blade for rotation about a rotational axis. The knife head presents a vacuum port fluidly connectable to the conduit. The vacuum port is spaced from the blade such that the knife head defines a suction pathway extending between the blade and the vacuum port.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: February 25, 2020
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Patent number: 10548262
    Abstract: A strand trimmer and method of use thereof. The strand trimmer includes a pair of pivotable arms each having a motor, a follower wheel, and a cutter-spindle assembly disposed thereon. The arms are biased toward one another and are guided by the follower wheels to pivot around obstacles passing between the arms. The motor rotates the cutter-spindle assembly to move cutting strands extending therefrom through a cutting path with sufficient rotational velocity to cut vegetation. The cutter-spindle assembly includes a spool and a strand-feed mechanism. The spool is oriented to rotate about a horizontal axis. The strand-feed mechanism includes a solenoid actuated plunger within a shaft of the cutter-spindle assembly. The plunger engages the spool to control rotation of the spool and thereby feeding out of incremental lengths of the strand.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: February 4, 2020
    Assignee: Trimverse LLC
    Inventor: Robert Simmons
  • Patent number: 10532478
    Abstract: A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body includes an outer wall including an arcuate surface having an upper region extending from a first upper end portion to a second intermediate portion and a lower region extending from the second intermediate portion to a third lower end portion. A plurality of gear teeth extend downwardly from the upper end of the body, each of the plurality of gear teeth including an outer peripheral face forming a portion of the upper region of the arcuate surface of the outer wall. The body outer wall includes a bearing surface having a lower bearing face in the lower region of the arcuate surface and an upper hearing face in the upper region of the arcuate surface.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: January 14, 2020
    Assignee: Bettcher Industries, Inc.
    Inventor: Jeffrey A. Whited
  • Patent number: 10531609
    Abstract: An apparatus including a rotary head assembly, which is configured to allow replacement of at least one cutting member. The rotary head assembly includes at least one spring biased cutting member receptacle sized and configured to receive at least one cutting member.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: January 14, 2020
    Inventor: Orlando Jerez
  • Patent number: 10532477
    Abstract: A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body section including an outer wall including an upper, middle and lower portions. The upper portion of the outer wall including a bearing race extending radially inwardly into the outer wall. The lower portion of the outer wall including the driven gear. In one embodiment, the intermediate portion includes an annular land having an outer surface defining a radially outermost portion of the outer wall of the body, the outer surface of the annular land being radially outward of the driven gear and the bearing race. In another embodiment, the intermediate portion includes an annular channel having an inner surface being radially inward of first and second ends of the bearing race and the driven gear.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: January 14, 2020
    Assignee: Bettcher Industries, Inc.
    Inventors: Nicholas A. Mascari, Jeffrey A. Whited
  • Patent number: 10524817
    Abstract: A device for removing an implanted object from a body vessel includes an actuator having an elongated sheath extending therefrom, the elongated sheath including a proximal portion and a distal portion. A tubular outer member has a proximal end attached to the distal portion of the elongated sheath, with a ramped surface at a distal end of the tubular outer member which constricts a diameter of a bore formed in the tubular outer member. A tubular inner member is located within the tubular outer member, the tubular inner member including a proximal end operably connected to the actuator and a distal end opposite the proximal end, the distal end of the tubular inner member including a plurality of resiliently flexible blades positioned to interact with the ramped surface of the tubular outer member such that the ramped surface is operable to deflect the resiliently flexible blades radially inwardly as the tubular inner member is advanced distally within the tubular outer member.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: January 7, 2020
    Assignee: THE SPECTRANETICS CORPORATION
    Inventor: Kenneth P. Grace
  • Patent number: 10517209
    Abstract: A trimmer head for a hand-held cutting device may include a first housing portion, a line holding assembly to hold and selectively release trimmer line, and a second housing portion operably coupled to the first housing portion to house the line holding assembly. The line holding assembly may include a spool configured to hold the trimmer line and a core operably coupled to the spool. The line holding assembly may be configured such that rotational movement of the core causes corresponding movement of the spool, but movement of the core in an axial direction does not cause corresponding movement of the spool.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: December 31, 2019
    Assignee: HUSQVARNA AB
    Inventor: Stefan Kullberg
  • Patent number: 10517210
    Abstract: A multi-mode trimmer head for use with an outdoor handheld tool such as a string trimmer, brush cutter, or the like is provided. The trimmer head includes an upper housing, lower housing, bump head, spool, and a spring. The spool includes a first pair of apertures configured to receive a pair of flexible trimmer lines to provide a bump-feed operating mode for the trimmer head. The spool also includes a separate, second pair of apertures configured to receive a single fixed-line trimmer line to provide a fixed-line operating mode for the trimmer head. The trimmer head is switchable between the fixed-line operating mode and the bump-feed operating mode without the need to disassemble the trimmer head.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: December 31, 2019
    Assignee: MTD PRODUCTS INC
    Inventors: Oscar Cabrera, Robert Johnson
  • Patent number: 10486323
    Abstract: A powered rotary knife includes a handle, a blade housing, an annular blade, and a blade bushing for rotatably mounting the blade within the housing. The blade housing includes an inner groove that is operable to receive the blade bushing therein. The blade housing and blade bushing are split in order to expand and receive the blade. The blade includes an outer groove that is also operable to receive the blade bushing. Thus, the blade bushing is spaced between the blade housing and blade and rotatably secures the blade within the blade housing.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: November 26, 2019
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen