Rotary Blade Patents (Class 30/276)
  • ROTARY KNIFE WITH MECHANISM FOR CONTROLLING BLADE HOUSING
    Publication number: 20130104404
    Abstract: A rotary knife includes a handle, a rotatable annular blade, and a blade carrier assembly. The blade carrier assembly includes an expandable blade housing operably coupled to the handle and configured to removably support the blade. The blade housing is movable relative to the handle between a blade-securing condition, in which the blade housing securely supports the blade for rotational operation, and a relatively expanded blade-releasing condition, in which the blade housing permits removal and installation of the blade relative to the blade housing. The carrier assembly includes a lever mechanism shiftably mounted relative to the handle and configured when shifted to expand the blade housing from the blade-securing condition to the blade-releasing condition.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 2, 2013
    Applicant: HANTOVER, INC.
    Inventor: Clark A. Levsen
  • Rotary cutter for mower
    Patent number: 8429886
    Abstract: A rotary cutter for a mower has a cord for cutting grass and the like by rotating itself; a reel for housing the cord and feeding the cord while intermittently rotating; a case for housing the reel; a cover for covering the case; and a pressing body protruding from the case. The pressing body is axially movable by being pressed, and intermittently rotating the reel. The reel and the pressing body are integrally constructed. Concave grooves for inserting the cord are provided in the reel in a radial direction and the cord is wound by fitting it to the concave grooves.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: April 30, 2013
    Assignee: Starting Industrial Co., Ltd.
    Inventors: Hiroki Kato, Tetsuya Yamada
  • Retrofitting grass trimming apparatus with spinning support guide
    Patent number: 8418371
    Abstract: A kit for retrofitting a grass trimming apparatus with a spinning support guide includes a base mount disc, a semispherical base, a guide fastener having a head with a hexagonal opening, one or more spacer discs, one or more disc fasteners, and a hex key. Furthermore, the base mount disc is adapted to affix to the semispherical base with the one or more disc fasteners and define a chamber for partially housing the guide fastener therein, and the hex key is adapted to rotate the guide fastener to threadably attach to a threaded receptacle on an underside of the grass trimming apparatus.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: April 16, 2013
    Inventor: Gene Hoelscher
  • Retrofitting grass trimming apparatus with spinning support guide
    Patent number: 8418370
    Abstract: A method of using a grass trimming apparatus includes the steps of: providing a grass trimming apparatus, including a trimmer head assembly having a spinning support guide at a bottom portion thereof, and a cutting mechanism positioned above the spinning support guide; holding the grass trimming apparatus in an operable position; placing the spinning support guide on a trimmable surface, whereby the spinning support guide provides a point of contact between the grass trimming apparatus and the trimmable surface; activating the cutting mechanism; trimming the cutting surface to a desired height; and moving the grass trimming apparatus along the trimmable surface while maintaining the point of contact.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: April 16, 2013
    Inventor: Gene Hoelscher
  • Root resurfacing attachment for hand held gas powered edgers
    Patent number: 8387261
    Abstract: A rotating cutting head includes multiple, separate, spaced-apart, parallel loops of chainsaw chains positioned around a central hub. The hub is attached to a spindle of a lawn edger. A safety shield is provided adjacent to the rotating cutting head. As the cutting head rotates, the chainsaw chains cut the tree roots. The rotating cutting head is used for resurfacing exposed tree roots to avoid tripping hazards and tree root strike damage to residential and commercial lawn maintenance equipment.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: March 5, 2013
    Assignee: RBGone Inc.
    Inventors: Jeff Carl Voyer, William Donald Peacock
  • BRUSH CUTTER
    Publication number: 20130031787
    Abstract: A brush cutter is provided with an operating rod, a cord holder configured to be rotatably driven at a front end of the operating rod, a cutting cord held by the cord holder and configured that a tip of the cutting cord is drawn out from the cord holder, and an under cover configured to cover from an under side a part of a region in which the cutting cord extending from the cord holder revolves. The cord holder is provided with a cord feeding button that projects downward and is configured to feed the cutting cord by being pressed. The under cover is provided with an opening that exposes the cord feeding button.
    Type: Application
    Filed: July 20, 2012
    Publication date: February 7, 2013
    Applicant: MAKITA CORPORATION
    Inventors: Takahiro KAMIYA, Yoshifumi MORITA, Shoko OHNO
  • BLADE BUSHING FOR ROTARY KNIFE
    Publication number: 20130031789
    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: Application
    Filed: October 8, 2012
    Publication date: February 7, 2013
    Inventor: Clark A. Levsen
  • BRUSH CUTTER
    Publication number: 20130031788
    Abstract: a brush cutter comprises an operating rod and a cord holder configured to be rotatably driven at a front end of the operating rod. A cutting cord is held by the cord holder and configured that a tip of the cutting cord is drawn out from the cord holder. The brush cutter further comprises an upper cover, a trimming cutter and a bouncing wall. The upper cover is configured to cover from an upper side and lateral side a part of region in which the cutting cord extending from the cord holder revolves. The trimming cutter is configured to cut the tip of the cutting cord drawn out from the cord holder. The bouncing wall is located inside the upper cover and configured to bounce off a cut piece of the cutting cord cut by the trimming cutter toward an opposite side from a user.
    Type: Application
    Filed: July 20, 2012
    Publication date: February 7, 2013
    Applicant: MAKITA CORPORATION
    Inventor: Shoko OHNO
  • POWER OPERATED ROTARY KNIFE
    Publication number: 20130025138
    Abstract: A power operated rotary knife (100) including: an annular rotary knife blade (300) including a knife blade bearing surface (319); a blade housing (400) defining a blade housing bearing surface (459); and a blade-blade housing bearing structure (500) disposed between the knife blade bearing surface (319) and the blade housing bearing surface (459). The blade-blade housing bearing structure (500) includes a rolling bearing strip (502) having a plurality of rolling bearings (506), such as ball bearings, disposed in spaced apart relation in a flexible separator cage (508). The rolling bearing strip (502) traverses through an annular passageway (504) defined between the knife blade bearing surface (319) and the blade housing bearing surface (459) to secure the knife blade (300) to the blade housing (400) and support the knife blade for rotation about a central axis (R) with respect to the blade housing (400).
    Type: Application
    Filed: July 25, 2011
    Publication date: January 31, 2013
    Applicant: Bettcher Industries, Inc.
    Inventors: JEFFREY A. WHITED, NICHOLAS A. MASCARI, KEVIN V. STUMP, MARTIN PATRICK TANSEY
  • POWER OPERATED ROTARY KNIFE
    Publication number: 20130025136
    Abstract: A power operated rotary knife (100) including: an annular rotary knife blade (300) including a knife blade bearing surface (319); a blade housing (400) defining a blade housing bearing surface (459); and a blade-blade housing bearing structure (500) disposed between the knife blade bearing surface (319) and the blade housing bearing surface (459). The blade-blade housing bearing structure (500) includes a rolling bearing strip (502) having a plurality of rolling bearings (506), such as ball bearings, disposed in spaced apart relation in a flexible separator cage (508). The rolling bearing strip (502) traverses through an annular passageway (504) defined between the knife blade bearing surface (319) and the blade housing bearing surface (459) to secure the knife blade (300) to the blade housing (400) and support the knife blade for rotation about a central axis (R) with respect to the blade housing (400).
    Type: Application
    Filed: July 25, 2011
    Publication date: January 31, 2013
    Applicant: Bettcher Industries, Inc.
    Inventors: Jeffrey A. Whited, Nicholas A. Mascari
  • POWER OPERATED ROTARY KNIFE
    Publication number: 20130025139
    Abstract: A power operated rotary knife (100) including: an annular rotary knife blade (300) including a knife blade bearing surface (319); a blade housing (400) defining a blade housing bearing surface (459); and a blade-blade housing bearing structure (500) disposed between the knife blade bearing surface (319) and the blade housing bearing surface (459). The blade-blade housing bearing structure (500) includes a rolling bearing strip (502) having a plurality of rolling bearings (506), such as ball bearings, disposed in spaced apart relation in a flexible separator cage (508). The rolling bearing strip (502) traverses through an annular passageway (504) defined between the knife blade bearing surface (319) and the blade housing bearing surface (459) to secure the knife blade (300) to the blade housing (400) and support the knife blade for rotation about a central axis (R) with respect to the blade housing (400).
    Type: Application
    Filed: July 25, 2011
    Publication date: January 31, 2013
    Applicant: Bettcher Industries, Inc.
    Inventors: Jeffrey A. Whited, Nicholas A. Mascari
  • POWER OPERATED ROTARY KNIFE
    Publication number: 20130025137
    Abstract: A power operated rotary knife (100) including: an annular rotary knife blade (300) including a knife blade bearing surface (319); a blade housing (400) defining a blade housing bearing surface (459); and a blade-blade housing bearing structure (500) disposed between the knife blade bearing surface (319) and the blade housing bearing surface (459). The blade-blade housing bearing structure (500) includes a rolling bearing strip (502) having a plurality of rolling bearings (506), such as ball bearings, disposed in spaced apart relation in a flexible separator cage (508). The rolling bearing strip (502) traverses through an annular passageway (504) defined between the knife blade bearing surface (319) and the blade housing bearing surface (459) to secure the knife blade (300) to the blade housing (400) and support the knife blade for rotation about a central axis (R) with respect to the blade housing (400).
    Type: Application
    Filed: July 25, 2011
    Publication date: January 31, 2013
    Applicant: Bettcher Industries, Inc.
    Inventors: Jeffrey A. Whited, Nicholas A. Mascari
  • CUTTER FOR WOVEN BELTS
    Publication number: 20130014394
    Abstract: A cutter for woven belts includes a handle having two ends respectively defined to be a first end and a second end. The handle has a circumferential side provided with a cutting opening located close to the first end, extended in a direction from the second end toward the first end and having an opposite sealed end connected with two guide grooves. A blade deposited in the handle is exposed in the cutting opening. Thus, when a woven belt is being cut by the cutter, the cut-off portion of the woven belt will be guided by the guide grooves to be separated from the original woven belt so that the woven belt cut apart can be prevented from being accumulated at the cutting opening or being hindered by a user's hand, enabling the cutter to effectively cut off woven belts for facilitating sequent work of removing the woven belts from goods.
    Type: Application
    Filed: July 13, 2011
    Publication date: January 17, 2013
    Inventor: Hsiu-Man YU CHEN
  • Bush cutter
    Publication number: 20130014393
    Abstract: To prevent overload and operability reduction and make operator's fatigue low in a bush cutting operation with a cutter cord in a bush cutter having a standard output, a bush cutter includes a cutting blade device at a front end of an outer pipe, a motor at a rear end of the pipe, and a driving shaft enclosed in the pipe for transmitting rotation force of the motor to the cutting blade device, a frame is attached to the outer pipe and/or the cutting blade device, and the frame has a protrusion with a front end which protrudes near a front end of a rotating cutting blade or to the front side of the front end of the blade, and extends at an angle within a range from 0 degree in parallel to 45 degrees upward with respect to a rotation face of the blade in a side view.
    Type: Application
    Filed: July 14, 2011
    Publication date: January 17, 2013
    Inventor: Masao YAMASHITA
  • Electric power tool
    Patent number: 8350512
    Abstract: An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch is operated by a user to be turned ON/OFF. The first semiconductor switch, provided on a current path from the power source to the motor, includes at least one semiconductor switching device. When the first operation switch is OFF, the first semiconductor switch is turned OFF to interrupt the current path. When the first operation switch is ON, the first semiconductor switch is turned ON to close the current path. The second semiconductor switch is provided on the current path in series with the first semiconductor switch and includes at least one semiconductor switching device. The second semiconductor switch closes/interrupts the current path by being turned ON/OFF in accordance with an input control signal.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: January 8, 2013
    Assignee: Makita Corporation
    Inventors: Yutaka Matsunaga, Hidekazu Suda, Takeshi Nishimiya
  • Battery Driven Electric Power Tool with Brushless Motor
    Publication number: 20130000132
    Abstract: An electric power tool (100) includes a power source (102) enclosed in a casing (104). The power source (102) is a brushless DC motor (202) which drives a drive mechanism (106) for a cutting device. Further, an oil pump is at least partly housed in the casing (104) of the electric power tool (100). The oil pump is also driven by the brushless DC motor (202).
    Type: Application
    Filed: February 11, 2010
    Publication date: January 3, 2013
    Applicant: HUSQVARNA AB
    Inventors: Oskar Bergquist, Johan Björnlinger, Johan Svennung, Magnus Lundgren
  • Rotary cutter for mower
    Patent number: 8341847
    Abstract: A rotary cutter for a mower for mowing grass and the like with a cord of a desired length extending in a radial direction of a cutting head from the cutting head driven for rotation through a drive shaft is described. The rotary cutter includes at least one fastening element for fixing one end of the cord to a cutting head main body. An inner end portion of the cord inserted from a sidewall of the head main body is fastened by the fastening element. The cord is removed and replaced with a new cord when the cord is worn out. The cord fastening element is disposed near a drive shaft coupling shaft tube portion in the cutting head main body. A cord outlet for removing the cord is provided to the drive shaft coupling shaft tube portion side. The inner end portion of the cord extends outside from the cord outlet and along a sidewall of the drive shaft coupling shaft tube portion of the cutting head main body.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: January 1, 2013
    Assignee: Starting Industrial Co., Ltd.
    Inventor: Hiroki Kato
  • Battery Driven Electric Tool
    Publication number: 20120324743
    Abstract: A balanced electric power tool (100, 700) is provided. The electric power tool (100, 700) may include a tool body (102, 702) and one or more working implements coupled to the tool body (102, 702). Further, the one or more working implemments may be connected to an electric drive motor. The electric power tool (100, 700) further includes at least one battery (114, 712), which may include at least one battery cell (204), for supplying the electric drive motor (110, 710) with electrical energy. The electric power tool (100, 700) further inlcudes a front handle (104, 704) and a rear handle (106, 706). The front handle (104, 704) is located at least partly in front of the rear handle (106, 706) along a longitudinal axis (L, L?) of the electric power tool (100, 700).
    Type: Application
    Filed: March 6, 2010
    Publication date: December 27, 2012
    Applicant: HUSQVARNA AB
    Inventors: Oskar Bergquist, Johan Björnlinger, Pär Martinsson
  • Line holding system for fixed line trimmer head
    Patent number: 8307558
    Abstract: In an embodiment, at least one pair cleats is provided. The two cleats of each pair are symmetrically arranged about a passageway for trimmer line. The two cleats of each pair allow trimmer line to be inserted through an entrance port with relatively little (if any) hindrance. However, the cleats grip the trimmer line preventing the trimmer line from being removed via the entrance port when the trimmer line is pulled from the entrance port (e.g., during use). In an embodiment, a trimmer head is provided with an exit port on the top of the trimmer head, which is for removing trimmer line by pulling the trimmer line through the exit port. The trimmer head uses a fixed length of trimmer line, which may be loaded with new trimmer line by inserting the trimmer line into an entrance port until one end of the trimmer line reaches the exit port.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: November 13, 2012
    Inventor: George E. Alliss
  • Bush cutter blade and bush cutter
    Patent number: 8307559
    Abstract: A bush cutter includes two types of cutting blades which differ completely in characteristics used to cut grasses and the like. One cutting blade is a resin string blade wound around a reel installed on a base plate, and the other is a metal blade installed in such a way as to protrude outward from the base plate. The bush cutter also includes a string guide which guides the resin blade to extend outwardly at less than a 90 degree angle from the reel as it projects from the base plate.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: November 13, 2012
    Inventor: Tatsuo Tomita
  • Universal mowing head for flexible cutter
    Patent number: 8291599
    Abstract: A mowing head is described, particularly for a bush-cutter, comprising a rotor rotating around a rotation axis (R-R) and its cover, in which the rotor is equipped with at least one supporting surface from which at least one external perimeter wall and at least one internal wall depart, such external perimeter wall and such internal wall mutually defining at least one housing seat of at least one length of flexible cutter, the external perimeter wall being radially equipped with at least one slit adapted to allow at least one length of the flexible cutter to go out from inside the housing seat to the outside.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: October 23, 2012
    Inventor: Michele Piccolo
  • Rotary knife with blade bushing
    Patent number: 8281493
    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: October 18, 2011
    Date of Patent: October 9, 2012
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • CLUTCH WITH BUILT-IN TORSIONAL VIBRATION DAMPER
    Publication number: 20120246943
    Abstract: A torsional vibration damper equipped clutch (20) for a combustion engine (E) includes a clutch drum (32), coupled with a cutter blade (3) through a drive shaft (6), a clutch shoe (34) connected with a crankshaft (16) of the combustion engine (E) and capable of being connected with the clutch drum (32) by the effect of a centrifugal force. The clutch (20) further includes a flywheel (18) fixed to the crankshaft (16) by means of a nut (19), and a holder (36) connected with the flywheel (18) for relative movement in a circumferential direction through a helical compression spring (50). The clutch shoe (34) is supported by the holder (36), and a stopper structure (56) is provided between the flywheel (18) and the holder (36) for transmitting a rotational force of the combustion engine (E) to the holder (36).
    Type: Application
    Filed: March 14, 2012
    Publication date: October 4, 2012
    Inventor: Tsuneyoshi Yuasa
  • String trimmer head having invertible components that enable selective clockwise and counterclockwise operations
    Patent number: 8266805
    Abstract: A trimmer head assembly has a housing that defines an interior. A spool is provided. The spool can be inserted into the interior of the housing either in an upright configuration or in a flipped inverted orientation. A spring is provided in the housing that biases the spool into a first position within the housing. A ratcheting mechanism exists between the spool and the housing that enables the spool to rotate only in a first direction when in said first position. The direction of rotation permitted by the ratcheting mechanism depends upon the orientation of the spool within the housing. In this manner, a single trimmer head assembly can be made to operate on a clockwise trimmer or a counterclockwise trimmer merely by inverting the spool.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: September 18, 2012
    Inventor: George Everett Alliss
  • Safety release for direct drive of rotary knife
    Patent number: 8250766
    Abstract: A rotary knife assembly includes a rotary knife with a spinning blade, a motor operable to power the rotary knife, a flexible drive cable with a proximal end drivingly connected to the knife to transmit rotational power to the blade while being flexed along the length of the cable, and a safety release drivingly connected to a distal end of the cable. The safety release is drivingly coupled to the motor and is operable to transmit rotational power from the motor to the drive cable and thereby the rotary knife. The safety release includes input and output members releasably drivingly engaged with one another. The safety release is operable to drivingly disengage the members.
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: August 28, 2012
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Electric saw device
    Patent number: 8250958
    Abstract: An electric saw device includes a first saw blade and a second saw blade. The first and the second saw blades are respectively driven by a small transmission shaft and a large transmission shaft to rotate in opposite directions. A round rib is disposed on an inner end surface of the first saw blade, and at least three recessed holes are arranged in a top end surface of the round rib at equal angle intervals. A steel ball is accommodated in each of the recessed holes, and protrudes out of the recessed hole. Protruding ends of the steel balls urge against an inner surface of the second saw blade, so as to limit a distance between the first saw blade and the second saw blade, and form a rolling friction when the first and the second saw blade rotate in the opposite directions.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: August 28, 2012
    Assignee: Newstar (Asia) Ltd
    Inventor: Chung-Chi Eric Chen
  • POSITIONING TUBE OF A VEGETATION CUTTER
    Publication number: 20120204427
    Abstract: A vegetation cutter includes a tubular casing and a power source is connected to a first end of the casing so as to drive a drive cable which extends through the casing. A cutting member is connected to the drive cable and located on a second end of the casing. A positioning tube is axially located in the casing and has an annular sleeve through which the drive cable extends. The sleeve has two ribs tangentially and diametrically connected thereto. The two ribs are parallel to each other and extend in opposite directions. The ribs contact an inner periphery of the casing. The ribs are flexible and position the positioning tube in the casing, and absorb vibration when in use.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 16, 2012
    Applicant: YAO I FABRIC CO., LTD.
    Inventor: TSUNG PEI YANG
  • POSITIONING TUBE OF A VEGETATION CUTTER
    Publication number: 20120204428
    Abstract: A vegetation cutter includes a tubular casing and a power source is connected to a first end of the casing so as to drive a drive cable which extends through the casing. A cutting member is connected to the drive cable and located on a second end of the casing. A positioning tube is axially located in the casing and has an annular sleeve through which the drive cable extends. The sleeve has two rib portions tangentially connected thereto and the two rib portions are parallel to each other. Each rib portion has two ribs on two ends thereof and the two ribs contact an inner periphery of the casing. The ribs are flexible and position the positioning tube in the casing, and absorb vibration when in use.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 16, 2012
    Applicant: YAO I FABRIC CO, LTD.
    Inventor: TSUNG PEI YANG
  • Adaptive, ergonomic, multi-purpose hand-held tool with flexible drive shaft
    Patent number: 8240055
    Abstract: An adaptive, ergonomic designed multi-purpose air motor driven hand-held trimmer that uses the air motor as the handle, has the air motor offset at an angle of 25 degrees to the fore and aft axis of the base plate and downward 10 degrees, to thereby have the center of gravity as near as possible to the wrist of the operator so that there will not be a constant bending of the wrist or exerting of constant hard pressure on the tissue at the base of the hand, thus virtually eliminating the possibility of the operator acquiring the carpal tunnel syndrome. Further disclosed are particular flexible drive shafts which may be used in the tool.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: August 14, 2012
    Inventor: Elwyn Gooding
  • Line-type grass cutting head which can be alternatively used on machines with left or right rotation
    Patent number: 8230602
    Abstract: The head comprises a housing (3a, 3B) for a winding spool (7) for winding the cutting line (F), provided with projections (15, 19) cooperating with teeth (17, 21) integral with the housing. The teeth and the projections are arranged in such a way so as to allow a stepped rotation of the spool with respect to the housing, when said spool is translated alternatively in opposite directions parallel to the axis of the head. The head comprises a first series of teeth and a second series of teeth (21A, 21B) which can be used alternatively and which are suitable each to allow the rotation of the spool (7) in one direction and to prevent the rotation in the opposite direction with respect to the housing.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: July 31, 2012
    Assignee: Arnetoli Motor S.r.L.
    Inventor: Fabrizio Arnetoli
  • FOUR-CYCLE ENGINE, BUSH CUTTER AND ENGINE-DRIVEN TOOL HAVING SAME
    Publication number: 20120180322
    Abstract: There is provided a four-cycle engine which can appropriately circulate oil in an engine regardless of a tilted condition with a simple structure. A crankcase (4) of a four-cycle engine (1) has a crank room (41) which rotatably supports a crankshaft (10) and an oil room (42) which is provided adjacent to the exterior of the crank room (41). The crankcase (4) also has partition walls (43) and (44) which partition the interior of the crankcase (4) into the crank room (41) and the oil room (42), respectively, and a communication path (45) which communicates the crank room (41) with the oil room (42). The partition walls (43) and (44) each has a cross section formed in a substantially V shape, and the communication path (45) is formed at an apex between the partition walls (43) and (44).
    Type: Application
    Filed: September 22, 2010
    Publication date: July 19, 2012
    Inventors: Takeshi Takeda, Takamoto Horiuchi, Hiroshi Ohira, Takahiro Hirai, Katsumi Kurihara
  • ELECTRIC PRUNING DEVICE
    Publication number: 20120174416
    Abstract: A cutting tool for cutting vegetation including a rotary cutting bit adapted to be advanced through the vegetation in a direction perpendicular to the bit's axis of rotation. The tool can include a guard member at least partially surrounding the rotary cutting bit. The guard member can be biased towards a first portion and pivotable to a second position during a cutting operation. The rotary cutting bit can be supported by two bit supports spaced apart axially. A removable handle and shield member can also be provided.
    Type: Application
    Filed: November 2, 2011
    Publication date: July 12, 2012
    Inventor: William J. Nelson, II
  • Lubrication system for a food product slicer
    Patent number: 8215022
    Abstract: A food product slicer includes a base and a knife mounted for rotation relative to the base. A slide rod extends in a direction past the knife. A carriage assembly is mounted for reciprocal movement back and forth past a cutting edge of the knife. At least one bearing arrangement connects the carriage assembly to the slide rod to facilitate the reciprocal movement of the carriage assembly. The bearing arrangement includes a lubricant reservoir. A bearing bracket holds a bearing that rides on the slide rod. The lubricant reservoir is fluidly connected to deliver lubricant to the slide rod in proximity to the bearing.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: July 10, 2012
    Assignee: Premark FEG L.L.C.
    Inventors: Fariborz Feizi, Shahram Shariff, Brian Stump
  • EDGE-TRIMMER
    Publication number: 20120167399
    Abstract: An edge-trimmer comprises a holdable support arm (2), a cutting head (3) rotatable about a rotation axis thereof (C) and positioned in proximity of an end (2b) of the support arm (2); a motor for moving the cutting head (3) by means of a transmission organ (5), an orientation device (6) of the cutting head (3) in the space connected to the support arm (2) and rotatable about a first rotation axis (A). The orientation device (6) exhibits a rotatable junction (7) which enables the cutting head (3) to further rotate about a second rotation axis (B) which is inclined with respect to the first rotation axis (A).
    Type: Application
    Filed: September 14, 2010
    Publication date: July 5, 2012
    Applicant: PAEM S.N.C. DI BECCHI SILVANO E C.
    Inventors: Lelio Codeluppi, Giorgio Becchi, Silvano Becchi
  • GRASS TRIMMING APPARATUS WITH SPINNING SUPPORT GUIDE
    Publication number: 20120159790
    Abstract: A spinning support guide for a trimmer head assembly includes a semispherical base, a base mount disc, the base mount disc being secured to the semispherical base by one or more flush mount machine screws, one or more spacer discs, each including a central aperture, each of the one or more spacer discs being disposed between the base mount disc and the semispherical base, and a guide fastener embedded within the spinning support guide. Furthermore, the guide fastener is adapted to threadingly attach to a threaded receptacle in an underside of the trimmer head assembly so as to secure the spinning support guide to the trimmer head assembly.
    Type: Application
    Filed: October 20, 2011
    Publication date: June 28, 2012
    Inventor: Gene HOELSCHER
  • Filament clamp for a vegetation trimmer
    Patent number: 8176639
    Abstract: A vegetation trimmer with a spool and hub assembly has a cutting filament wound around the spool. The free end of the filament extends through an aperture in the hub into the cutting plane. The spool and hub are rotated at a high rate to allow the filament to cut vegetation. The spool includes a plurality of arms which engage with arms on the hub. When the spool is acted upon, the arms on the spool disengage with the arms on the hub to permit relative rotation of the spool to the hub to feed additional filament into the cutting plane. An indexing feature is used to regulate the amount of additional cutting filament that is allowed to be fed into the cutting plane.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: May 15, 2012
    Inventors: Ian J. Doane, James C. Doane
  • Electrical Two-Way Rotary Trimmer
    Publication number: 20120102755
    Abstract: An electrical trimmer (20) for rotary cutting in a garden comprising a rotary cutting equipment (1) for cutting grass or other vegetation, and an electrical motor (2) for driving the rotary cutting equipment (1). The electrical trimmer (20) further comprises a switching means (4) for changing the rotation direction of the electrical motor drive between clockwise (A) and counterclockwise (B) rotation for the rotation of the rotary cutting equipment (1).
    Type: Application
    Filed: July 9, 2009
    Publication date: May 3, 2012
    Applicant: HUSQVARNA AB
    Inventors: Mikael Racov, Johan Svennung, Mia Herou
  • Control handle of a bush cutter and a bush cutter therewith
    Patent number: 8151471
    Abstract: A control handle included in a bush cutter is provided. A driving controller is switched on so that the cutting blade is driven in an adjusted speed mode at a rotation speed set by a speed adjuster. The control handle includes a high-speed mode controller configured to set the rotation speed of the cutting blade to a high rotation speed, and an interlock device provided between the driving controller and the high-speed mode controller and configured to interlock the driving controller and the high-speed mode controller when the high-speed mode controller is switched on so as to move the driving controller concurrently with the high-speed mode controller. When the high-speed mode controller is switched on, the driving controller is concurrently switched on by the interlock device so that the cutting blade is driven in a high-speed mode.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: April 10, 2012
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Hideki Tomiyama, Masanobu Yoshimura
  • Brush cutter
    Patent number: 8146257
    Abstract: A brush cutter is provided with fixing pieces projecting outward and opposing each other substantially at a middle position of a slit stretching between both ends of a clamp member. Accordingly, an outer pipe is clamped in the middle of an attachment housing and apart from an axial center of the outer pipe, so that a size of the attachment housing in an axial direction can be reduced and stress concentration on the outer pipe can be avoided.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: April 3, 2012
    Assignee: Husqvarna Zenoah Co., Ltd.
    Inventors: Yuka Nishiura, Kazuo Shirakami, Jun Noguchi
  • VARIABLE CUTTING HEIGHT TRIMMER HEAD
    Publication number: 20120066912
    Abstract: A trimmer and a trimmer head for use with the trimmer, the trimmer head including a body rotatable about an axis, the body defining a plurality of axially spaced channels each sized to receive at least a portion of a trimmer line therein, and a clamping mechanism in operable communication with at least two of the axially spaced channels to selectively retain a trimmer line positioned within any one of the at least two axially spaced channels. The trimmer head may include a wear disk pivotable relative to the trimmer head body. In addition, a release button of the clamping mechanism may be arranged on the body to provide additional clamping force when the trimmer head rotates about the axis.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 22, 2012
    Inventors: James C. Ferrell, William E. Colber, Benjamin E. Montgomery
  • Trimmer Head with Automatic Trimmer Line Feed Mechanism
    Publication number: 20120066913
    Abstract: An automatic-feed trimmer head for a vegetation trimming machine. A spool is positioned within the interior of a housing. A cam guide formation is disposed atop the top flange of the spool. The cam guide formation defines a pathway. A cam arm is provided that is mounted to the housing with a pivot connection. The cam arm has a cam projection that extends into the pathway. A spring is provided that biases the cam arm into a first orientation. In the first orientation, the shape of the pathway enables the cam projection to move only in a first direction. The cam arm moves about the pivot connection from its first orientation to a second orientation when the trimmer head assembly is rotated above a predetermined rotational speed. When the cam arm is in its second orientation trimmer line is unwound from the spool.
    Type: Application
    Filed: September 20, 2011
    Publication date: March 22, 2012
    Inventors: George E. Alliss, Steven W. Hamblin
  • Lawnmower cutting deck and releasable blade
    Patent number: 8136333
    Abstract: A cutting system for a lawnmower or the like includes multiple blade assemblies driven by a motor, each motor independently operable with respect to each other motor. The blade assemblies are arranged into a cutting system with a length less than that of the combined length of the blades of the blade assemblies. Blade assemblies include components that align so as to balance the blade upon rotation. These components allow for a single user to attach and disengage the blade from the motor, or portion rotated thereby, with hands alone, absent tools.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: March 20, 2012
    Assignee: F Robotics Acquisitions Ltd.
    Inventors: Shalom Levin, Shai Abramson
  • STRING TRIMMER
    Publication number: 20120055033
    Abstract: A string trimmer has a blade storage mechanism wherein the blade storage mechanism has a cavity arranged on the body of the string trimmer for storing a blade.
    Type: Application
    Filed: August 15, 2011
    Publication date: March 8, 2012
    Applicant: CHERVON (HK) LIMITED
    Inventors: Toshinari Yamaoka, Fangjie Nie, Huixing Fu
  • Portable implement
    Patent number: 8127455
    Abstract: A portable implement is provided that includes a guide rod having a tool element arranged on one end and a motor for driving the tool element arranged on the other end. A holding element for holding the portable implement is arranged between the tool element and the motor. A connecting element is arranged on the guide rod or on the holding element, for connecting the holding element with the guide rod. The connecting element, in a first position of an operating element, is connected with the guide rod displaceably in a longitudinal direction on the guide rod. The connecting element, in a second position of the operating element, is releasably fixed on the guide rod.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: March 6, 2012
    Assignee: DOLMAR GmbH
    Inventors: Matthias Wenckel, Carsten Ziegs
  • Mower Blade Attachment
    Publication number: 20120047752
    Abstract: A bolt for attaching a blade to a rotating blade carrier has a conical shoulder section with a conical wall tapering inward from bottom to top and a shoulder top edge above the conical shoulder section. A shank extends upward from the top shoulder edge, and is configured to extend through a shank hole in the carrier, and the shoulder top edge extends laterally outward from part of the shank. A threaded portion extends upward from the shank. A blade defines a vertical mounting hole with a conical portion with a slope corresponding to the conical portion off the bolt.
    Type: Application
    Filed: September 1, 2010
    Publication date: March 1, 2012
    Inventor: Todd HOFMANN
  • ANTI-VIBRATION STRUCTURE FOR OPERATION LEVER OF PORTABLE BRUSH CUTTER
    Publication number: 20120048582
    Abstract: According to one embodiment, there is provided an anti-vibration structure for an operation lever of a portable brush cutter, in which a lever device includes: a main body through which a pole is inserted in an axial direction, the main body including protrusions protruding from both ends in the axial direction; support members provided on the pole to support the both ends of the main body such that the main body is separated from the pole, each support member including a recess; and anti-vibration materials accommodated in the recesses of the support members so as to be sandwiched between the support members and the main body in the axial direction, respectively, each anti-vibration material including a groove to which a respective one of the protrusions of the main body is inserted.
    Type: Application
    Filed: August 30, 2011
    Publication date: March 1, 2012
    Inventors: Tetsuya YAMADA, Shigemitsu Chigira
  • ANTI-VIBRATION STRUCTURE FOR A HANDLE OF A PORTABLE BRUSH CUTTER
    Publication number: 20120048581
    Abstract: According to one embodiment, there is provided an anti-vibration structure for a handle of a portable brush cutter, the structure including: a pole; an operation unit provided at a front portion of the pole; an engine provided and a lever device provided at a base portion of the pole; an attachment stay unit fixed to a middle portion of the pole, the attachment stay unit having an accommodation recess at each end thereof; an operation handle having a protrusion protruding from each end thereof; and anti-vibration materials sandwiched between the attachment stay unit and the handle main body in a left-right direction of the pole, so that one side of the anti-vibration material is accommodated in the accommodation recess while the protrusion is inserted in an open-groove formed on the other side of the anti-vibration material.
    Type: Application
    Filed: August 30, 2011
    Publication date: March 1, 2012
    Inventors: Tetsuya YAMADA, Shigemitsu Chigira
  • Bush cutter
    Patent number: 8117756
    Abstract: A bush cutter for performing weed-cutting operations while suspended from the shoulders of an operator. The bush cutter is provided with an operating rod and an operating handle, which is provided midway along the operating rod in the longitudinal direction. The rearward rod-half of the operating rod between the operating handle and a motor has a curved part that curves laterally.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: February 21, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tomomi Nakaya, Hiromi Yuzuriha
  • ROTARY KNIFE WITH BLADE BUSHING
    Publication number: 20120030952
    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: Application
    Filed: October 18, 2011
    Publication date: February 9, 2012
    Applicant: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Chain-type flexible cutting edge
    Patent number: 8096216
    Abstract: A chain-type flexible cutting edge, particularly for bush-cutter is described, comprising at least one linear connecting and cutting link (3) and at least one toothed connecting and cutting link (5) mutually connected in an articulated manner in order to have a smooth cutting-start edge (TL) and a toothed cutting-start edge (TD).
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: January 17, 2012
    Inventor: Michele Piccolo