Blade Sharpener Patents (Class 451/293)
  • Patent number: 9039493
    Abstract: A blade sharpening system using the interior surface of a grinding wheel against which a blade is drawn along its entire length for sharpening. The sharpening system includes a blade holding configuration having multiple hinged arms. A cam operating between two of the hinged arms serves to alter the angle of incidence between the blade and the grinding wheel as the blade is drawn across the grinding wheel. The result is that a wide variety of different blade configurations can be easily accommodated by the sharpening system.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: May 26, 2015
    Inventor: Michael G. Borsch
  • Patent number: 8864554
    Abstract: The invention relates to a sharpener for sharpening a cutting tool, such as a knife, the sharpener comprising a body part (1), a rotatable sharpening roll (2) resting on the body part, and a first guide groove (11) above the sharpening roll for receiving a first tool blade and for guiding it in relation to the sharpening roll (2). To allow the sharpener to be made structurally simple and well applicable for sharpening both narrow and wide blades, the sharpener comprises a second guide groove (14), which is wider than the first guide groove (11), to be arranged above the sharpening roll (2) to allow a second tool blade to be received and guided in relation to the sharpening roll (2).
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: October 21, 2014
    Assignee: Fiskars Brands Finland Oy Ab
    Inventors: Petteri Masalin, Juha Huhtala, Kari Kunnas, Aaro Huttunen, Jouni Salojärvi, Sami Lyytikäinen, Olli-Pekka Vänttilä
  • Patent number: 8597083
    Abstract: A blade sharpening system using the interior surface of a grinding wheel against which a blade is drawn along its entire length for sharpening. The sharpening system includes a blade holding configuration having multiple hinged arms. A cam operating between two of the hinged arms serves to alter the angle of incidence between the blade and the grinding wheel as the blade is drawn across the grinding wheel. The result is that a wide variety of different blade configurations can be easily accommodated by the sharpening system.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: December 3, 2013
    Inventor: Michael G. Borsch
  • Patent number: 8535120
    Abstract: A blade sharpening system is provide that includes a base and a pendulous arm having a first end rotatably coupled to the base by a pivot joint. The blade sharpening system also includes a sharpener suspended by the pendulous arm and configured to engage a generally circular agricultural implement blade while mounted on the agricultural implement. The pendulous arm is configured to enable movement of the sharpener to accommodate lateral variations in blade profile.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: September 17, 2013
    Assignee: CNH America LLC
    Inventors: Robert A. Zemenchik, Ivan Rieke, Mark Hoffman, Ross L. Gingrich, Ben G. Zimmerman, Alan R. Martin, Tracey D. Meiners, Michael G. Kovach, Paul Hurtis
  • Patent number: 8512103
    Abstract: A tool sharpening assembly (100) suitable for sharpening cutting tools (140,350,366,546,562). In some embodiments, a wedge-shaped port is formed between a rotational first abrasive surface (160,262) and a stationary second abrasive surface (162,264) to sharpen a distal cutting edge (146) of a cutting tool (140,230,546). In other embodiments, a cooling mechanism (136,326,330,334,338) actively draws heat generated during a sharpening operation from a tool (140) and through a tool support structure (170,234,328,332) contactingly supporting the tool, in further embodiments, a rotatable abrasive slotted disc (364) comprises at least one inspection aperture (372) formed from an interior sidewall (390) with upper and lower leading and trailing edges (396,398,400,402) of non-uniform separation distance. In other embodiments, a cylindrical drum abrasive member (572) is provided with an associated stationary support plate (574).
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: August 20, 2013
    Assignee: Professional Tool Manufacturing, LLC
    Inventors: Daniel T. Dovel, Christopher T. DeLorenzo, Steven J. Miner
  • Publication number: 20130165021
    Abstract: An electrically powered knife sharpener for ceramic (or other brittle, crystalline or amorphous media which could be used for blades) knives includes at least one pre-sharpening stage with a sharpening member(s) and includes a final stage with a sharpening member(s). There are one or more motor driven shafts on which the abrasive surfaced sharpening members, such as disks, are mounted. Guide structure is provided to guide the knife for aligning and positioning the knife facet precisely at a defined location on the abrasive surface of each rotating sharpening member. The pre-sharpening stage sharpening member(s) moves in a first direction. The final stage sharpening member(s) moves in a second direction which differs from the first direction.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 27, 2013
    Applicant: EDGECRAFT CORPORATION
    Inventor: EDGECRAFT CORPORATION
  • Patent number: 8348725
    Abstract: A blade holding jig arrangement for either grinding or honing a blade including a mounting bracket assembly with an elongate guide bar and a device for rigidly supporting the guide bar. A support arm can be pivotally mounted on the guide bar by means of a tubular support mounted on one end of the arm and extending perpendicular thereto. The guide bar extends through a passageway in the tubular support. The support arm can be moved along the guide bar for grinding. A clamp unit for clamping a blade includes a U-bracket with two legs and two clamping jaws adjustably mounted on the U-bracket between the legs. The clamp unit is attached to an end section of the arm remote from the one end of the arm. The clamping jaws can be moved towards one another in order to clamp the blade.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: January 8, 2013
    Inventor: Tymen Clay
  • Patent number: 8337281
    Abstract: A universal blade sharpening machine is operable to securely hold and sharpen any one of multiple variously sized circular blades. The machine includes a blade-sharpening drive with an adjustable blade sharpener and also includes a universal blade holder that is rotatably powered by the drive. The blade holder includes a blade-receiving chassis that holds the blade during sharpening and is rotatable about a rotation axis of the blade holder. The chassis includes a plurality of radially spaced blade-retaining sections each associated with a respective one of the circular blades.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: December 25, 2012
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Patent number: 8277291
    Abstract: Apparatus and method for sharpening a workpiece, such as a cutting tool. An abrasive disc is rotatable about a disc rotational axis and includes a plurality of spaced apart, radially disposed apertures extending therethrough from a first surface to an opposing second surface of the disc. The first surface is configured to facilitate sharpening of a workpiece by contacting engagement of the workpiece against an abrasive layer adjacent the first surface between adjacent first and second apertures of said plurality. The first surface further induces controlled axial displacement of the workpiece away from the disc as the second aperture approaches the workpiece during disc rotation. The first surface is preferably concave so as to extend into the disc between each adjacent pair of the apertures. Alternatively, the first surface is provided with different compressibilities to induce the controlled axial displacement of the workpiece.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: October 2, 2012
    Assignee: Professional Tool Manufacturing, LLC
    Inventor: Daniel T. Dovel
  • Patent number: 8277284
    Abstract: A sharpening machine generally includes a grinding wheel having a perimeter that is rotatable about a first axis. The sharpening machine includes an adjustment device adapted to be coupled to a structure of the sharpening machine. A shaft is mounted to the adjustment device. The shaft defines a second axis that is generally parallel to the first axis when the adjustment device is coupled to the structure. The shaft is movable along a predetermined feed axis toward the grinding wheel. A carousel is rotatably connected to the shaft of the adjustment device. A contouring tool is rotatably connected to the carousel. The contouring tool has a contour surface. Movement of the shaft of the adjustment device along the feed axis is configured to translate the carousel and move the contouring tool into and out of engagement with the grinding wheel to facilitate dressing of the perimeter of the grinding wheel to a grinding wheel contour.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: October 2, 2012
    Assignee: 1339513 Ontario Ltd.
    Inventors: Murray David Wilson, Steven David Wilson, Omer Leon Hageniers
  • Publication number: 20120225614
    Abstract: Provided is a gear grinding machine the maintainability of which can be improved and which is capable of being miniaturized. More specifically, provided is a gear grinding machine wherein a threaded grinding stone (17) and a workpiece (W) are engaged with each other and are rotated in this state, resulting in the workpiece (W) being ground, and wherein between a dressing position (P2) where the threaded grinding stone (17) can be dressed and a retreat position (P1) to which a retreat is made from the dressing position (P2) during grinding, a disk dresser (66) which, by being driven into rotation, dresses the threaded grinding stone (17) is swung about an axis (C2) which is parallel to an axis (C1) that is the rotational axis for the workpiece (W) and which intersects, at right angles, the direction in which the threaded grinding stone (17) is fed toward the workpiece (W).
    Type: Application
    Filed: September 29, 2009
    Publication date: September 6, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masashi Ochi, Yoshikoto Yanase
  • Publication number: 20120052776
    Abstract: A blade sharpening system is provide that includes a base and a pendulous arm having a first end rotatably coupled to the base by a pivot joint. The blade sharpening system also includes a sharpener suspended by the pendulous arm and configured to engage a generally circular agricultural implement blade while mounted on the agricultural implement. The pendulous arm is configured to enable movement of the sharpener to accommodate lateral variations in blade profile.
    Type: Application
    Filed: August 31, 2010
    Publication date: March 1, 2012
    Applicant: CNH America LLC
    Inventors: Robert A. Zemenchik, Ivan Rieke, Mark Hoffman, Ross L. Gingrich, Ben G. Zimmerman, Alan R. Martin, Tracey D. Meiners, Michael G. Kovach, Paul Hurtis
  • Patent number: 8092279
    Abstract: A device and method of sharpening hair cutting scissor blades passes a blade over the perimeter portion of a flexible sharpening pad to flex the perimeter portion out of the plane of the pad. The blade is held in an angled orientation over the pad and is moved horizontally and downward during the sharpening motion. Independent horizontal and vertical movements allow addressing irregularly shaped blades including blades with a radial shape and convex blades.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: January 10, 2012
    Inventor: Charles Ryan Parrish
  • Publication number: 20110244767
    Abstract: A knife sharpener sharpens a wide range of knives and blades. The knife sharpener includes an angle guide associated with a first stage abrasive surface at an angle in the range of 12-18 degrees. A second stage is provided at an angle in the range of 17-23 degrees. A third stage is provided at an angle in the range of 19-25 degrees. The abrasive surface in the first and second stages is in the range of 240 to 400 grit while the abrasives in the third stage is in the range of 600 to 2000 grit.
    Type: Application
    Filed: March 11, 2011
    Publication date: October 6, 2011
    Inventors: Bela Elek, Daniel D. Friel, SR.
  • Publication number: 20110237166
    Abstract: A bed-type circular saw blade grinder includes: a bed section; a support section fixedly connected with the bed section, a circular saw blade being rotatably connected with the support section; a rotary seat pivotally disposed on the bed section via a pivot shaft and reciprocally rotatable about the pivot shaft between a first position and a second position, the rotary seat having a first connection section and a second connection section positioned on two sides of the pivot shaft; a circular saw blade restriction section disposed at the first connection section for driving the circular saw blade to intermittently rotate; and a grinding unit disposed at the second connection section for grinding saw teeth. When the rotary seat is pivotally rotated between the first and second positions, the rotary seat drives the circular saw blade restriction section and the grinding unit to move with the rotary seat.
    Type: Application
    Filed: March 27, 2010
    Publication date: September 29, 2011
    Inventor: Tung-Min CHANG
  • Patent number: 7993183
    Abstract: A method for sharpening a wood working knife having opposed cutting edges, wherein the knife body is held by clamping features on a first surface of the knife and the opposed edges are simultaneously sharpened.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: August 9, 2011
    Assignee: Iggesund Tools AB
    Inventor: Ian G. Zinniger
  • Patent number: 7959494
    Abstract: A blade, such as the blade of a precision shear, having a cutting angle which changes progressively along the length of the blade through a predetermined angular measure is sharpened by coupling the blade with an articulated arm assembly through a drive mechanism which rotates the blade about a longitudinal direction in response to movement of the blade along the longitudinal direction, as the blade is drawn across a sharpening surface. The drive mechanism includes a cam and follower for rotating the blade through an angular displacement corresponding to the predetermined angular measure of the change in the cutting angle so as to preserve the changing cutting angle. The drive mechanism is selectively uncoupled to permit free manual rotation of the blade as the blade is drawn across the sharpening surface for finishing the blade subsequent to the sharpening operation. The drive mechanism accommodates blades of both right-handed shears and left-handed shears.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: June 14, 2011
    Inventor: Leonard D. Pietrzak
  • Publication number: 20110136413
    Abstract: A blade sharpening system using the interior surface of a grinding wheel against which a blade is drawn along its entire length for sharpening. The sharpening system includes a blade holding configuration having multiple hinged arms. A cam operating between two of the hinged arms serves to alter the angle of incidence between the blade and the grinding wheel as the blade is drawn across the grinding wheel. The result is that a wide variety of different blade configurations can be easily accommodated by the sharpening system.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 9, 2011
    Inventor: Michael G. Borsch
  • Patent number: 7934978
    Abstract: A ice skate blade sharpening machine comprises a skate holder which holds the blade in a releasably fixed position, a rotatable grinding wheel having a periphery and rotatable about a grinding wheel axis, and a contouring tool having a contour surface, moveable between an engaged position and a disengaged position, wherein in the engaged position the contouring tool is held in place with respect to the grinding wheel axis, the contour surface engages the rotating grinding wheel and grinds the periphery of the grinding wheel to define a grinding wheel contour, and wherein the grinding wheel contour grinds the blade to define a profile when the grinding wheel is rotating and the blade is held in the releasably fixed position.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: May 3, 2011
    Assignee: 1339513 Ontario Ltd.
    Inventors: Murray David Wilson, Omer Leon Hageniers
  • Patent number: 7896729
    Abstract: A blade-sharpening machine for sharpening any one of various sizes of rotary blades comprises a drive unit and a universal blade chuck for holding the blade to be sharpened. The drive unit further includes a sharpening assembly that sharpens the blade while the drive unit rotates the blade chuck. The blade chuck includes a chassis and jaws that are circumferentially spaced about the chassis and are shiftably attached thereto for securing the rotary blade. A spring-loaded fastener normally urges the jaws radially inwardly into engagement with the blade. A centrally-positioned cam is operable to shift the jaws simultaneously so that the blade can be selectively secured on the blade chuck.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: March 1, 2011
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Publication number: 20110034111
    Abstract: A sharpener for creating cross-grind knife edges includes a nominally flat annular abrasive sharpening member which could be a ring or a disk and is rotated about its center and held against a moving knife edge facet to simultaneously and sequentially abrade the knife edge at multiple locations on the abrasive member. The disk may be slidably mounted on a shaft in opposition to a spring restraining force. The disk is nominally disposed in a vertical orientation. The sharpener may include multiple stages including a manual stage having a pair of off axis conical shaped rotatable abrasive coated disks which have abrading lines on opposing facets which are not parallel but cross and intersect in a crossing pattern at the blade edge.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 10, 2011
    Inventors: Bela Elek, Daniel D. Friel, SR., Daniel D. Friel, JR.
  • Patent number: 7862406
    Abstract: A saw chain sharpening assembly including a support member, a grinding head, a clamping device and a cooling system whereby the saw chain sharpening assembly is adapted to provide a means for efficiently sharpening small and/or large chains.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: January 4, 2011
    Inventor: Michael McIntyre
  • Publication number: 20100323591
    Abstract: A universal blade sharpening machine is operable to securely hold and sharpen any one of multiple variously sized circular blades. The machine includes a blade-sharpening drive with an adjustable blade sharpener and also includes a universal blade holder that is rotatably powered by the drive. The blade holder includes a blade-receiving chassis that holds the blade during sharpening and is rotatable about a rotation axis of the blade holder. The chassis includes a plurality of radially spaced blade-retaining sections each associated with a respective one of the circular blades.
    Type: Application
    Filed: June 19, 2009
    Publication date: December 23, 2010
    Applicant: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Patent number: 7854650
    Abstract: A knife sharpener comprises a base, a motor, a grinding wheel assembly, a rotary shaft and a spring. The working channel between the edge of the grinding disc and the grinding awl is automatically adjustable to accommodate different blade of different thickness. When the knife sharpener performs grinding operation, the grinding wheel assembly can simultaneously grind both cutting sides of the knife. In addition, the knife can be clamped firmly through the three contacting points of the grinding disc, the grinding awl, and the cutting edge, so that the operation of knife grinding can be successfully performed.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: December 21, 2010
    Inventor: Hung-Nung Tsai
  • Patent number: 7740522
    Abstract: A motorized knife sharpener includes means of for sharpening heavy, medium, and fine blades at angles appropriate to the cutting edges of such blades.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: June 22, 2010
    Assignee: National Presto Industries, Inc.
    Inventor: Shane R. Walker
  • Patent number: 7686676
    Abstract: A knife sharpener is provided which is capable of precision sharpening of hunting and similar knives that have a first and second blade face, each of which terminates at a facet that meets the corresponding facet to create the knife edge. At least the first of the blade faces has a lower distinct planar or concave section adjacent the edge facet with the lower planar or concave section of the face being set at an angle to the center line of the blade thickness that is different from the angle of the adjoining upper section of the same blade face located adjacent to the back of the blade. The sharpener includes a sharpening member such as one having an abrasive coated surface. The sharpener also includes a planar angle knife guide surface of a knife guide which is designed for intimate sliding and sustaining contact with the second face of the blade in order to position an edge facet on the first of the faces into precise angular relation with the sharpening surface.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: March 30, 2010
    Assignee: Edgecraft Corporation
    Inventors: Daniel D. Friel, Sr., Bela Elek
  • Publication number: 20090233530
    Abstract: A wide range of knives and blades, including Western, Asian or traditional Japanese style blades that have a primary edge facet on at least one side of the knife edge are sharpened through use of an electric knife sharpener having a first sharpening stage with at least one rotating abrasive surface disk and a knife angle guide to position the blade's facet at a first relative angle of approximately 15 degrees as it contacts the moving abrasive surface. The knife sharpener includes a second sharpening stage with at least one rotating abrasive surfaced disk and a knife angle guide to position the blade's facet at a second relative angle of approximately 20 degrees as it contacts the rotating abrasive surface.
    Type: Application
    Filed: March 10, 2009
    Publication date: September 17, 2009
    Inventors: Daniel D. Friel, SR., Bela Elek
  • Publication number: 20090124181
    Abstract: A dressing device for sharpening or conditioning of a blade or the like includes one or more disk pairs each having a pair of disks respectively presenting a plurality of ribs. The disks are oriented in face-to-face relationship with the ribs thereof in meshed, intercalated relationship to thereby create circumferential dressing openings. The ribs are configured to create sharpened edge on a knife blade or the like.
    Type: Application
    Filed: January 13, 2009
    Publication date: May 14, 2009
    Applicant: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Patent number: 7510458
    Abstract: An apparatus 40 for sharpening a router or shaper bit 12 of the type having a flat cutting face 18. The apparatus 40 includes a chuck 64 holding the cutting bit 12. A grinding wheel 108 has a flat grinding face 110 and a grinding wheel shaft 116 on which the grinding wheel 108 rotates. A chuck support supports the chuck 64 and positions it so that the bit cutting face 18 is in a plane parallel to and in front of the flat face 110 of the grinding wheel 108. A side adjustment plate 46 has an index dial by which the side adjustment plate 46 is moved incrementally, in small amounts, to move the cutting face 18 of bit 12 into and against the grinding wheel face 110 during the grinding process. A carriage plate 44 permits moving the bit 12 back and forth in a plane perpendicular to the grinding wheel shaft. A laser 314 directs a beam onto a mirror 318 affixed to the bit cutting face 28.
    Type: Grant
    Filed: December 1, 2005
    Date of Patent: March 31, 2009
    Inventor: Charles M. Thomas
  • Publication number: 20090081931
    Abstract: A dressing device for sharpening or conditioning of a blade or the like includes one or more disk pairs each having a pair of disks respectively presenting a plurality of ribs. The disks are oriented in face-to-face relationship with the ribs thereof in meshed, intercalated relationship to thereby create circumferential dressing openings. The ribs are configured to create sharpened edge on a knife blade or the like.
    Type: Application
    Filed: September 21, 2007
    Publication date: March 26, 2009
    Applicant: HANTOVER, INC.
    Inventor: Clark A. Levsen
  • Patent number: 7503835
    Abstract: In one embodiment, a method of sharpening reel blades on a lawnmower reel includes positioning a grinding wheel in contact with the reel, rotating the grinding wheel about an axis of rotation, linearly translating the grinding wheel along a longitudinal path. and rotating the reel about its longitudinal axis. The axis of rotation of the grinding wheel is transverse to a longitudinal axis of the reel.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: March 17, 2009
    Inventor: Don Cotton
  • Patent number: 7494403
    Abstract: Various forms of knife guides are provided for knife sharpeners to minimize damage to the knife blade. The knife guides include the provision of flexible fibers on the guide surface and further include rings, such as O-rings on an array of rollers when the rollers are used to form the guide surface. Other forms of knife guides are non-contact optical arrangements.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: February 24, 2009
    Assignee: Edgecraft Corporation
    Inventor: Daniel D. Friel, Sr.
  • Patent number: 7491115
    Abstract: An indexing device for successively positioning a tool element relative to an apparatus adapted to perform a series of operational tasks on said tool element comprises a base, a reciprocally movable support mounted on the base, a fixing member adjustably mounted on the support for fixing the tool element thereto, a pivotable arm mounted to the base and extending between the support and the apparatus, an indexing abutment mounted on the arm and positioned thereon to contact a part of the tool element. The support is moved in a first direction to bring the tool element in a task performing position with the apparatus. The movable support has a pusher to contact the arm and to cause pivotal movement of the arm when the support is moved in this first direction whereby the arm and the abutment are moved away from the task performing position. Thereafter, the arm is returned to a subsequent task performing position when the support is moved in a second direction opposite the first direction.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: February 17, 2009
    Inventor: Michel Letendre
  • Patent number: 7488238
    Abstract: The emery wheel grinding machine with adjustable drill bit chuck disclosed herein has an adjustable chuck in which is provided with a T-bushing having an outer flange formed at one end thereof. The outer flange is provided with several pairs of stop traps along its circumference, whereas the number of stop traps are determined according to the number of cutter blades to be shaved. Several stop pins are formed on the surface of the outer flange to control the turning angle of the drill bit or the cutter. The T-bushing further has a taper hole in it. When the chuck head which holds the drill bit or the cutter is inserted into the taper hole, the cutter blade can be in contact with the emery wheel with a certain tilted angle thereby allowing the cutter blades of various length and number to be effectively shaved, ground and finished.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: February 10, 2009
    Assignee: Taiwan More-Cash Villager Corp.
    Inventor: Ming-Ko Liao
  • Patent number: 7488241
    Abstract: A modified truncated cone-shaped disk is molded onto a plastic hub which is mounted on a motor driven shaft. The hub has an axial bore of a size to fit with very close clearance on the shaft while still permitting the disk to freely slide against a low spring force.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: February 10, 2009
    Assignee: Edgecraft Corp.
    Inventors: Bela Elek, Daniel D. Friel, Sr.
  • Publication number: 20080311829
    Abstract: The emery wheel grinding machine with adjustable drill bit chuck disclosed herein has an adjustable chuck in which is provided with a T-bushing having an outer flange formed at one end thereof. The outer flange is provided with several pairs of stop traps along its circumference, whereas the number of stop traps are determined according to the number of cutter blades to be shaved. Several stop pins are formed on the surface of the outer flange to control the turning angle of the drill bit or the cutter. The T-bushing further has a taper hole in it. When the chuck head which holds the drill bit or the cutter is inserted into the taper hole, the cutter blade can be in contact with the emery wheel with a certain tilted angle thereby allowing the cutter blades of various length and number to be effectively shaved, ground and finished.
    Type: Application
    Filed: June 12, 2007
    Publication date: December 18, 2008
    Inventor: Ming-Ko Liao
  • Patent number: 7452262
    Abstract: Various forms of knife guides are provided for knife sharpeners to minimize damage to the knife blade. One of the forms of knife guides comprises non-contact optical arrangements which includes a light source, at least one light detector and an indicator that monitors and displays the intensity of light reflected from the blade surface.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: November 18, 2008
    Assignee: Edgecraft Corporation
    Inventor: Daniel D. Friel, Sr.
  • Publication number: 20080248732
    Abstract: A disc blade sharpener. A wheel carriage includes a rotatable abrasive wheel contactable against the side surface of the cutting edge of the disc blade. A rotatable driver wheel mounted on the carriage rotates the disc blade while the abrasive wheel contacts and sharpens the cutting edge of the disc blade. The carnage includes an electric motor, abrasive wheel, and driver wheel that may be adjustably moved both in a horizontal direction and a vertical direction relative to the concave disc blade.
    Type: Application
    Filed: April 3, 2007
    Publication date: October 9, 2008
    Inventor: Eric Warrenburg
  • Publication number: 20080229883
    Abstract: A saw chain sharpening assembly including a support member, a grinding head, a clamping device and a cooling system whereby the saw chain sharpening assembly is adapted to provide a means for efficiently sharpening small and/or large chains.
    Type: Application
    Filed: October 6, 2006
    Publication date: September 25, 2008
    Inventor: Michael Mcintyre
  • Publication number: 20080085666
    Abstract: A sharpening device that utilizes templates for sharpening specific shaped points. The templates are easily replaceable for grinding additional facets or for additional styles of points.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 10, 2008
    Inventors: Steven James Lindsay, Charles Paul Hamler
  • Patent number: 7220169
    Abstract: A sharpening apparatus (16) for a blade-like cutting implement. The sharpening apparatus has an elongate body (18) and a cutting edge extending widthwise across one end of the body (11) at a predetermined angle relative to the longitudinal axis of the body (11). The cutting edge is formed by an inclined face formed on one side face of the body. The apparatus includes a cradle (26) for holding a blade-like implement to be sharpened and a mounting body for mounting the cradle (26) relative to a grinding surface. The cradle is mounted on a pair of guide rails (22, 24) for movement along a rectilinear path, the cradle including first and second rail followers slidably connected to a first and second of the guide rails respectively. The cradle (26) includes a seat for locating the blade-like implement at a reselected reference position on the cradle (26) such that the cutting edge of the implement to be sharpened is located parallel to said rectilinear path.
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: May 22, 2007
    Assignee: Turner Intellectual Property Limited
    Inventor: Paul Steabben Hepworth
  • Patent number: 7198558
    Abstract: A dressing device (10,90) for sharpening or conditioning of a blade (18) or the like includes one or more disk pairs (36–40,108), each having a pair of disks (52,54,110,112) respectively presenting a series of circumferentially spaced, projecting teeth (64) with openings (66) therebetween. The disks (52,54,110,112) are oriented in face-to-face relationship with the teeth (64) thereof in meshed, intercalated relationship to thereby create circumferential dressing openings (76,122). The dressing surfaces (74) of the teeth (64) are of arcuate, concave configuration so as to create a desirable gothic-arch edge on a blade (18) or the like.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: April 3, 2007
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Patent number: 7121923
    Abstract: A dual position sharpening device can be set up so that the abrasive wheel is either vertical or horizontal. A guard retains cooling water in either position.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: October 17, 2006
    Inventors: Margaret Mary Sweet, legal representative, Edward G. F. Sweet, deceased
  • Patent number: 7118466
    Abstract: The scissor sharpening machine includes a honing disc with a curved blade guide and a blade clamp assembly which slides axially along the blade guide. The curvature of the blade guide corresponds to the conventional curvature along the lengths of the blades of a pair of high quality scissors or shears, and assures that they are sharpened properly. The blade clamp assembly includes a series of predetermined stops to set the proper bevel angle during the sharpening process. However, the blade may be rocked about its longitudinal axis to the limit set by the stop, in order to provide a convex curvature to the blade edge if so required. The apparatus may include a cabinet with motor controls and other components, and the blade guide and blade clamp assemblies may be adjusted and repositioned to allow sharpening of either left hand or right hand scissors and shears.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: October 10, 2006
    Inventor: W. L. Laney
  • Patent number: 7112124
    Abstract: A rotary blade sharpener is comprised of a motorized platen positioned in a housing with a surrounding wall and an open top. An abrasive sheet with an adhesive bottom surface is adhered to a disc, which is tightened to the platen by a knob. The disc is color coded to indicate the grit of the abrasive sheet. An adjustable support rack is hinged to the housing above the platen. A jig is positioned on the rack and arranged to slide side to side thereon. The jig is arranged to receive and securely hold a blade and position it against the abrasive sheet. The rack is adjustable to position a beveled front end of the blade flat on the abrasive sheet. A lubricant container with a drip tube is attached to the housing. A cutout in the surrounding wall is arranged to enable grinding a flat side of the blade.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: September 26, 2006
    Inventor: Donald Naples
  • Patent number: 7008307
    Abstract: The present invention relates to an apparatus for sharpening a circular blade. The sharpening apparatus is adapted to be positioned adjacent a power-driven sharpening wheel at an angle. The sharpening apparatus includes an angularly adjustable tool holder for angularly positioning the circular blade against the power-driven sharpening wheel. The sharpening apparatus of the present invention also includes a blade holder that quickly and easily locks the circular blade into place for sharpening and releases the blade after sharpening is complete. The present invention provides a reasonably safe and efficient sharpening apparatus for circular blades that provides uniform, high quality sharpening of one-sided and two-sided blades of varying circumferences.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: March 7, 2006
    Assignee: Wolff Industries
    Inventors: David H. Wolff, James A. O'Donnell, Richard F. Hunter, Jr.
  • Patent number: 6875093
    Abstract: A sharpener includes a motor driven shaft with at least one slidably mounted sharpening assembly consisting of a supporting hub structure mounted by its central bore hole on the shaft. The hub structure supports a symmetrically shaped rotating surface containing an ultra fine abrasive material. The rotating surface is pressed with a force of less than 0.2 lb. by a spring action to make sustained rotating abrading contact with a facet of a knife positioned by a knife guide to align the facet into contact with the surface containing the abrasive materials.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: April 5, 2005
    Assignee: Edgecraft Corporation
    Inventors: Daniel D. Friel, Sr., Daniel D. Friel, Jr., Terry J. Hall, Sr.
  • Patent number: 6863600
    Abstract: A finishing apparatus modifies the physical structure along the edge of a metal knife blade wherein the edge is formed at the junction of two edge facets presharpened with abrasives. The finishing apparatus consists of at least one precision angular knife guide that positions the edge of the blade into contact with the rigid surface of a driven moving member and positions the plane of the adjacent edge facet at a precise predetermined angle relative to the plane of the rigid surface that is harder than the metal of the knife and is without tendency to abrade.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: March 8, 2005
    Assignee: Edgecraft Corporation
    Inventor: Daniel D. Friel, Sr.
  • Patent number: 6802763
    Abstract: A sharpening apparatus with substantially rigid sharpening wheels disposed substantially fixedly on a rotatable drive shaft. An edge of a blade inserted in a slot in the apparatus comes into contact with a sharpening surface on a sharpening wheel. A sliding block associated with that sharpening surface slidably yields to accommodate the inserted blade and applies a force on the blade towards the sharpening surface. The user may selectively adjust force on the blade to achieve more or less sharpening of the edge of the blade. The plurality of sharpening surfaces can offer different levels or degrees of sharpening.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: October 12, 2004
    Assignees: Salton, Inc., Hop Shing M&P Manufactory Limited
    Inventor: Rocky Leung
  • Patent number: RE39492
    Abstract: A method of sharpening bedknives for reel type mowers by installing sets of locator surfaces in a bedknife grinder, grinding the surfaces with the grinder to be aligned and parallel, installing a bedknife located against surfaces in both sets, and electromagnetically locking the bedknife in position while grinding the edge to be sharpened. The bedknife is adjusted to be aligned with the reel blades by adjusting the bedknife pivots in the mower.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: February 20, 2007
    Inventor: Keith M. Scott