With Work-underlying Guard Means Patents (Class 30/370)
  • Patent number: 10711433
    Abstract: The invention relates to a trench cutting machine (10) for making a cut in a surface (13). The trench cutting machine comprises a frame (12) comprising at least one rear axle (15) and at least one front axle (17); a rotatable circular blade (20) mounted to the frame (12). The front axle (17) is vertically adjustable relative to the frame (12) between a first position where the circular blade (20) is lifted clear of the surface (13), and a second position where the circular blade (20) is arranged to extend downwards from the frame (12) to cut a predetermined distance into the surface (13). The frame (12) comprises an auxiliary front axle (19) located in front of the axis of rotation of the circular blade (20), wherein the auxiliary front axle (19) and the rear axle (15) are arranged to support the frame (12) on the surface (13) during a cutting operation and to maintain a selected depth of cut. The invention further relates to a shroud assembly and a debris guiding device for such a machine.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: July 14, 2020
    Assignee: HUSQVARNA AB
    Inventor: Pierre Gustafsson
  • Patent number: 10524967
    Abstract: An orthopedic cast removal apparatus comprises a housing having a portion that can be gripped by an operator during use. A motor is located inside the housing. A blade is operatively connected to and driven by the motor via a drive mechanism, the blade defining a cutting edge having cutting teeth located thereon. The drive mechanism according to this aspect has a driven element with an axis of rotation substantially parallel to a surface of an orthopedic cast when it is cut. The blade is connected to the driven element at a connection point that moves periodically around the axis of rotation. As a result, the cutting edge of the blade engages material of the orthopedic cast in a galloping fashion.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: January 7, 2020
    Assignee: RhinoX Tool, LLC
    Inventors: John Joseph Walsh, IV, Boyce Lee Muller
  • Patent number: 8667694
    Abstract: A power tool includes a power source, a speed change mechanism and a tip tool wherein the speed change mechanism has first and second rotating shafts arranged in parallel, a first power transmission passage equipped with a first gear train and a first clutch, and a second power transmission passage equipped with a second gear train and a second clutch. The speed change mechanism is constituted to switch the transmission passage between the first power transmission passage and the second power transmission passage while keeping the first and second gear trains in meshed state by switching the first and second clutches between power transmission state and power interruption state depending on a load applied to the tip tool.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: March 11, 2014
    Assignee: Makita Corporation
    Inventors: Manabu Tokunaga, Ryu Hashimoto
  • Publication number: 20130318800
    Abstract: A ring cutting device for cutting a ring lodged on a human finger and a device for separating and extracting a cut ring that is still on a wearer's finger. The ring cutting device can be operated by a single hand and includes an elongate power and drive portion that fits comfortable in a user's hand, a finger guard portion having a ring guard and a biasing system, a housing having a protective shield and a mount for mounting the finger guard portion, and a cutting portion having a rotatable circular saw blade that is mechanically coupled to the rotary drive mechanism of the power and drive portion. The power and drive portion includes a rotary drive mechanism that is mechanically coupled to a rotary drive motor the power and a light source for illuminating the ring during a cutting operation.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 5, 2013
    Inventors: Ronald D. Weiss, Wesley I. Ripa, Malcolm J. Paradise
  • Patent number: 8539866
    Abstract: A method for installing a fiberglass cast on and removing the cast from an individual includes an open ended pliable thin-walled polymer guide track and cutting tool designed to track along said guide track to cut the cast and to prevent, while a cast is being removed, injury to the individual.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: September 24, 2013
    Assignee: Castrax, L.L.C.
    Inventors: Suresh Nayak, Ronald R Watson
  • Patent number: 8230606
    Abstract: The electric tool includes a base having an opening portion and a bottom face; a blade being projected downward from the bottom face of the base through the opening portion of the base, the blade being capable of cutting while sliding the bottom face of the base on an upper face of a work piece; a motor driving the blade; a housing accommodating the motor. The bottom face of the base is at least partially coated with a resin including fluorine.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: July 31, 2012
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kenichirou Yoshida, Yoshio Osada, Mizuho Nakamura, Satsuo Sato, Junichi Kamimura, Takashi Kawamata
  • Publication number: 20120005904
    Abstract: Apparatus and methods for cutting a material, especially with low material speed and high cutting torque. In some embodiments, the apparatus is a hand-held device for quietly cutting through an orthopedic cast with little or no generation of debris. In yet other embodiments, there is a method for automatically advancing material past a shearing surface, such that the shearing action occurs at about the same velocity as the advancement. In yet other embodiments, there is a device for cutting material between a foot and a sharp edge, with the bottom of the foot being under the sharp edge to protect the skin of the patient.
    Type: Application
    Filed: November 13, 2008
    Publication date: January 12, 2012
    Applicant: ORTHOPEDIATRICS, LLC
    Inventors: Paul A. Zwirkoski, Joseph T. Adams, Nick A. Deeter, Gary D. Barnett, Bob Van Seggern, Michael C. Jones
  • Patent number: 8069757
    Abstract: A cast-cutter for use in removing a cast from a patient comprises a body (20), cutting means (18, 148, 230) supported by the body (20), and a protection member (16, 204, 206, 236, 244) supported by the body (20) and adapted to be positioned between the cutting means (18, 148, 230) and the patient, to protect the skin of the patient. In one disclosed embodiment the cutting means cuts a cast by a shearing action. In another disclosed embodiment the cutting means cuts a cast by an abrading action.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: December 6, 2011
    Inventors: David J. Ross, George Miller
  • Patent number: 8069760
    Abstract: A method for installing a fiberglass cast on and removing the cast from an individual includes an openended pliable thin-walled polymer guide track and cutting tool designed to track along said guide track to cut the cast and to prevent, while a cast is being removed, injury to the individual.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: December 6, 2011
    Inventors: Suresh Nayak, Ronald R Watson
  • Patent number: 8042439
    Abstract: A method for installing a fiberglass cast on and removing the cast from an individual includes a guide track and cutting tool designed to control carefully the vertical displacement and lateral displacement of the tool when the tool is used to cut the cast, and, accordingly, to prevent, while a cast is being removed, injury to the individual.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: October 25, 2011
    Inventors: Suresh Nayak, Ronald R. Watson
  • Patent number: 8033205
    Abstract: A roof shingle peeler device which comprises a saw blade, a motor to operate the saw blade, a horizontal arm and skiis to regulate the depth of the saw blade, a wedge to remove the nails and shingles from the roof deck and enable the saw blade to cut the shingles into a predefined section, and a frame to facilitate the transportation of the predefined section of shingles for being received and collected into a bag for disposal. A hoist and return hoist are used to pull the roof shingle peeler device up and down the roof deck from the base to the crest while removing shingles.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: October 11, 2011
    Inventor: Edward J. Cross
  • Publication number: 20100132202
    Abstract: A method for installing a fiberglass cast on and removing the cast from an individual includes a guide track and cutting tool designed to control carefully the vertical displacement and lateral displacement of the tool when the tool is used to cut the cast, and, accordingly, to prevent, while a cast is being removed, injury to the individual.
    Type: Application
    Filed: December 1, 2008
    Publication date: June 3, 2010
    Inventors: Suresh Nayak, Ronald R. Watson
  • Patent number: 7704123
    Abstract: An adjustable handle assembly for a road surface cutting saw is provided that includes a back plate attached to the saw housing, an outer gear attached to the back plate, a bracket assembly including an inner gear, a tubular member slidably attached to the bracket assembly, and an adjustment lever having a threaded engagement end. The adjustment lever secures the bracket assembly to the saw such that the inner gear engages the outer gear. When the adjustment lever is loosened a bias spring biases the bracket assembly away from the saw such that the inner gear disengages from the outer gear to thereby allow rotation of the handle assembly to a desired operating position.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: April 27, 2010
    Assignee: Diamond Products, Limited
    Inventors: Martin D. Marsic, Kent A. Smith
  • Patent number: 7699902
    Abstract: There is provided a refuse-trapping cover for a portable working machine, which is capable of reducing the deterioration of the engine-cooling performance of the cooling fan that may be caused by the fibrous sawdust of a palm tree. The refuse-trapping cover includes a frame (40) having a plurality of open windows (40a-40j) and attached to the outer casing (20) of a chain saw (1) to thereby cover the air inlet slits (22), and a mesh member (50) integrally fixed to the frame (40) to thereby cover open windows (40a-40j). The frame (40) is constructed to have predetermined dimension and configuration, and the mesh member (50) is fixed to a predetermined location of the frame (40) to thereby provide a sufficient space (S) between the mesh member (50) and the outer casing (20) to avoid the mesh member (50) from being adsorbed onto the outer casing (20).
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: April 20, 2010
    Assignee: Yamabiko Corporation
    Inventors: Hisato Ohsawa, Kazuhiro Yoneyama
  • Publication number: 20080229588
    Abstract: The invention relates to a guide device (1) for a saw blade (2), in particular for an electric tool, which is operated in reciprocating motion (H) and which comprises a clamping device (4) engaging in the clamping end (3) of the saw blade (2), and a pendulum guide device (5) attached to the back of the saw blade and located at an axial distance (a) from the clamping device (4). According to the invention, the pendulum guide device (5) features at least two guide elements (6) which are arranged at an axial distance from each other. The invention further relates to an electric tool which features said guide device (1). Moreover, the invention relates to an electric tool with said guide device (1), in particular a jigsaw (23).
    Type: Application
    Filed: April 3, 2007
    Publication date: September 25, 2008
    Inventor: Marcel Casota
  • Patent number: 7299553
    Abstract: A zero-offset power handsaw having a body unit including a skid plate and a handle, a circularly shaped saw blade, a blade mounting mechanism including a removable mounting device having a head, a guard, and an electric motor. The saw blade has a forward extremity and includes a hub for containing a forward extension of the head therein. The guard has a forward extremity that is co-planar with the forward extremity of the saw blade. A adjusting mechanism allows selective and angular adjustment of the skid plate relative to the handle. A switch allows electrical power to be selectively provided to the electric motor.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: November 27, 2007
    Inventor: Jimmy N. Brann
  • Patent number: 7043845
    Abstract: The trim attachment for a portable circular saw is generally L-shaped, having a generally rectangular, planar, horizontal mounting plate and a perpendicular fence extending downward from a lengthwise side thereof. The perpendicular fence forms an insert portion therealong for receiving the blade guard of the circular saw. The mounting plate is adjustably mounted to the shoe of the portable circular saw on the underside of the shoe using carriage bolts that pass through, and are adjustable along, slots cut into the mounting plate and through corresponding holes in the shoe of the saw, and that are secured by wing nuts. Trim of relatively small width may be easily and accurately cut from a common wood member, such as a 2?×2?–2?×8? members. The trim attachment may also be useful in dressing the edge of a wood member.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: May 16, 2006
    Inventor: Charles R. Lukens
  • Patent number: 6591826
    Abstract: The invention relates to a device on a handheld cutting or sawing machine with a rotatable cutting or sawing blade; a driving machinery for rotating the blade; means for supplying cooling or flushing water on the blade and/or a workpiece; a rear handle with controls for the driving machinery; a front handle bow with a front part (5) which is the normal gripping part of the handle bow; a right hand side part (6) and a left hand side part; and a water valve (8) for control of the flow of cooling or flushing water, said valve comprising a valve housing (27) with a valve house chamber (33); a valve body (36) which is turnable about an axis of rotation (23) by means of a lever (22); an inlet nipple (15) for the connection of a water hose (16) for incoming water to the valve; and an outlet nipple (17) for the connection of a water hose (10) for outgoing water from the valve; and securing means (35, 43) for mounting the water valve on the handle blow.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: July 15, 2003
    Assignee: Aktiebolaget Electrolux (publ)
    Inventor: Ove Donnerdal
  • Publication number: 20020096166
    Abstract: A saw extension for supporting a hand-held portable rotary saw has a base, a plurality of wheels positioned to support the base above a surface, and an upwardly extending arm extending from the base to a control grip. The hand-held portable rotary saw is removably attached to the base with at least one locking pin positioned through a guide plate of the hand-held portable rotary saw and into at least one locking aperture of the base. The saw extension includes a power control mechanism mounted on the saw extension. The power control mechanism includes a power socket into which a saw power cord of the hand-held portable rotary saw can be plugged, a master power cord for electronically connecting the power socket with an external power source.
    Type: Application
    Filed: February 25, 2002
    Publication date: July 25, 2002
    Inventor: David Halstead
  • Patent number: 6363617
    Abstract: A guard for a cast cutter includes a first member securable to a cast cutter and a second member securable to a guard member. The second member is freely movable relative to the first member during operation along a support axis. Stops limiting movement in either direction along the support axis. This cast cutter guard has only one setting which accommodates variations thickness. Pressure exerted upon the cast cutter during operation results in movement of the second member relative to the first member, rather than pressure upon the injured area.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: April 2, 2002
    Inventor: Terry Frost
  • Patent number: 6349712
    Abstract: A saw extension for supporting a hand-held portable rotary saw has a base, a plurality of wheels positioned to support the base above a surface, and an upwardly extending arm extending from the base to a control grip. The hand-held portable rotary saw is removably attached to the base with at least one locking pin positioned through a guide plate of the hand-held portable rotary saw and into at least one locking aperture of the base. The saw extension includes a power control mechanism mounted adjacent the control grip. The power control mechanism includes a power socket into which a saw power cord of the hand-held portable rotary saw can be plugged, a master power cord for electronically connecting the power socket with an external power source, and a trigger switch for operably controlling the flow of power to the hand-held portable rotary saw.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: February 26, 2002
    Inventor: David Halstead
  • Patent number: 6112736
    Abstract: An apparatus for cutting grooves in a green concrete slab having at least one terminating side edge transverse to a broad top surface in a low cost manner is described and includes the following elements: a hand-held portable rotary saw, supported on a rollable platform disconnectably connected to and supporting the relative to the green concrete slab. The rollable platform includes a planar base in surface contact with a conventional guide plate of the saw, and flared side walls extending outwardly from the planar base an anchoring portion adapted to receive a human-generated force to provide rectilinear travel along a preselected direction over the green concrete slab. The planar base also includes a slot in alignment with an opening in the guide plate through which the saw blade extends whereby a working plane of reference is defined that intersects an axis of rotation of the saw blade whereby a maximum depth of cut is easily defined coincident with the working plane of reference.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: September 5, 2000
    Inventor: Martin A. Bearden
  • Patent number: 5941227
    Abstract: An apparatus for cutting grooves in a green concrete slab having at least one terminating side edge transverse to a broad top surface in a low cost manner is described and includes the following elements: a hand-held portable rotary saw, supported on a rollable platform disconnectably connected to and supporting the relative to the green concrete slab. The rollable platform includes a planar base in surface contact with a conventional guide plate of the saw, and flared side walls extending outwardly from the planar base an anchoring portion adapted to receive a human-generated force to provide rectilinear travel along a preselected direction over the green concrete slab. The planar base also includes a slot in alignment with an opening in the guide plate through which the saw blade extends whereby a working plane of reference is defined that intersects an axis of rotation of the saw blade whereby a maximum depth of cut is easily defined coincident with the working plane of reference.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: August 24, 1999
    Inventor: Martin A. Bearden
  • Patent number: 5115567
    Abstract: An electric plastic cast saw control system for cutting off of plastic cast composed of an inner layer of absorbent cotton and an outer layer formed by hardened covering material including a thin conductive plate placed between the inner layer and the outer layer so that a relay device is triggered to cut off power supply to electric saw on the instant the saw gets contact with the thin conductive plate and consequently stop the electric saw instantaneously, and a reset device to resume power supply to the electric saw automatically or manually after cutting off of the power source.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: May 26, 1992
    Inventors: Chang-Min Yang, Chun-Mei Chou
  • Patent number: 4976034
    Abstract: A device for removing a ring from a patient's finger includes a motor driven saw blade that is actuated when a lever and a handle are brought towards each other. The motor driven saw blade cuts the ring so it can be removed from the patient's finger. One embodiment of the device includes two saw blades that are movable with respect to each other so that once a ring is cut, a gap will be defined and an opening element can be inserted between the two saw blades to widen that gap by forcing the saw blades apart. Since the saw blades are in contact with the ring, forcing them apart will widen the gap and permit the ring to be removed.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: December 11, 1990
    Inventor: Anthony T. Whitman
  • Patent number: 4625405
    Abstract: A cast cutter having a pair of juxtaposed, sawedged blades which oscillate relative to each other on a common pivot point to provide a scissorslike cutting action resulting in a relatively wide kerf in the cast being out. A patient protective blade guard, slidable between the underside of the cast and the patient's skin, includes an aperture into which portions of the blades partially extend wherein a nip area is provided at an interface location of the blades and the guard to facilitate cutting of an inner woven cloth lining of the cast to the scissor teeth. The oscillatory motion of the blades relative to each other minimizes clogging thereof by dust particles generated during a cutting operation. The blades are slightly spaced from each other to preclude friction generated heat buildup that could result from the moving blades rubbing together.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: December 2, 1986
    Assignee: Deeco, Inc.
    Inventors: H. Dean Hudnutt, Edsell M. Eady, Mark V. Cromie
  • Patent number: 4340060
    Abstract: An improved craniotome footplate, or dura guard for cutting between bur holes or from a single bur hole in the skull without damaging the dura membrane which is intermediate the underside of the skull and the brain. The guard includes a flexible, resilient tip for negotiating bony prominences on the underside of the skull and for separating the dura from the underside of the skull in advance of the craniotome cutting of the skull.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: July 20, 1982
    Assignee: Joseph J. Berke
    Inventors: Joseph J. Berke, Eric L. Gay
  • Patent number: 4062110
    Abstract: A portable tool for stripping metal sheathing from heavy conductive cable comprising a casing shaped to be manually held and having a rotatable drive shaft to which is secured a thin cutting wheel. A fixture is secured to the casing and carries a flange which projects therefrom, in turn carrying a guide extending transversely into proximity with and beyond the cutting wheel. The guide defines a passage in which the cutting wheel penetrates and the guide is relatively thin to penetrate between the outer metal sheathing of a cable and the inner resilient sheathing such that the outer metal sheathing will be cut by the cutting wheel while the guide travels over the inner sheathing. For this purpose, the guide has a small bend in approximate alignment with the axis of rotation of the drive shaft of the cutting wheel. The guide member can be in the form of a U-shaped element having parallel legs straddling the passage in which the cutting wheel extends.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: December 13, 1977
    Inventor: Marcelino N. Alvarez
  • Patent number: 3973324
    Abstract: A saw for cutting off plaster casts and the like. A single freely reciprocal sawblade is driven by a motor for providing cutting of a cast of the like. A flat guiding plate is disposed in the same vertical plane as the sawblade, and is spaced from the rear of the blade, a lower anvil is provided for engagement with the bottom surface of a cast being cut and for guiding the reciprocatory motion of the sawblade, and a spring-pressed gliding plate is disposed generally forwardly of the blade and engages the upper surface of a cast being cut. The gliding plate and anvil overlap over a substantial length thereof, and firmly hold the cast in place during cutting.
    Type: Grant
    Filed: December 3, 1974
    Date of Patent: August 10, 1976
    Inventor: Curt Persson