Blade Sharpener Patents (Class 451/321)
  • Patent number: 10759017
    Abstract: A glideway crowning plate for creating a crown on a cutting edge of a cutting blade with a sharpening jig including a glideway crowning plate having a concaved curved surface of a predetermined radius placed proximate spaced glides of a sharpening jig. The sharpening jig utilizes a flat sharpening plate or a flat sharpening stone and the sharpening jig is side-stroked on the flat sharpening plate or the flat sharpening stone and the glideway crowning plate imposes a curved path of the predetermined radius on the sharpening jig, the cutting blade, and the flat sharpening plate or the flat sharpening stone to create a crown in the cutting edge of a cutting blade.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: September 1, 2020
    Inventor: David G. Powell
  • Patent number: 10005169
    Abstract: A modular honing guide system comprised of interchangeable parts, having a multitude of configurations for manually sharpening or honing a multitude of tool types used for, but not limited to wood carving, wood working, fine art printmaking, jewelry making and metal work. A plurality of edge tool clamps mountable to a universal honing guide base system. Tools are honed on planar abrading surface(s) in conjunction with a supporting honing guide base configuration moving across a work surface which is in parallel with an abrading surface or medium. Cancellation of thickness variation of individual abrading mediums, and elimination of variability of abrading surface height differentials relative to a work surface, for a plurality of abrading mediums, is provided. A multitude of bevel, skew and cutting edge profiles are attained. Resulting is a superior solution to honing guides having limited expandability and/or lacking in abrading medium thickness variation or height differential mitigation.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: June 26, 2018
    Inventor: Daniel Barry Sabo
  • Patent number: 9289874
    Abstract: A modular honing guide system comprised of interchangeable parts, having a multitude of configurations (FIGS. 1A, 4C, 8A, 9A, 10P, 11D, 12H, 13A, 14A, 16A, 17A) for manually sharpening or honing a multitude of tool types used for but not limited to wood carving, wood working, fine art printmaking, jewelry making and metal work. Tools are honed on a planar abrasive surface, while a honing guide base is moved across a supporting work surface. A plurality of edge tool clamps can be mounted to a unified honing guide base system. With manual random motion or combined random motion and uniform rotational or rocking motion, a combined cutting edge and honing guide is moved across abrading and work surfaces respectively. A multitude of bevel, skew and cutting edge profiles are attained. System is an improvement over honing guides which are designed for specific or limited types of edge tools.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: March 22, 2016
    Inventor: Daniel B. Sabo
  • Patent number: 9221144
    Abstract: A universal sharpening jig for a cutting blade includes a base plate, a protractor plate coupled to the base plate, an incline plate hingedly coupled to the base plate and slideably connected to the protractor plate, the incline plate configured to secure the cutting blade and configured to set and fix the angle of the incline plate with respect to the base plate to define a sharpening angle of all or a portion of a bevel with respect to a flat back of the cutting blade. A push plate is slideably attached proximate a front of the base plate and co-planar with a bottom surface of the base plate, the push plate configured to position a user-applied force vector thereon and directly apply the force vector closely proximate the intersection of the bevel and an abrasive surface to reduce de-stabilizing moments and user energy need to create a sharpened edge between the bevel and the flat back of the cutting blade.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: December 29, 2015
    Inventor: David G. Powell
  • Patent number: 8960060
    Abstract: A cutting table has a planar table surface with a linear cutting edge that is engaged by a moveable cutting blade that progressively contacts the cutting edge to make a cut. An elongate sharpening element extends along the cutting edge wherein the sharpening element will be progressively contacted by the blade with each cut, thereby sharpening the blade.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: February 24, 2015
    Inventor: Mark A. Zaremski
  • Patent number: 8790162
    Abstract: Apparatus and associated method for sharpening a cutting edge of a tool. In accordance with some embodiments, a side of the tool is placed in contacting engagement against a reverse sharpening guide surface to orient the tool at an acute angle with respect to an abrasive surface, with the abrasive surface extending in a lateral direction from a first end to a second end and the reverse sharpening guide surface located proximate the first end. The tool is moved away from the reverse sharpening guide surface and along the abrasive surface in the lateral direction toward the second end while nominally maintaining the tool at the acute angle so that a cutting edge of the tool is sharpened against the abrasive surface in a trailing cutting edge orientation with a top surface of the tool opposite the cutting edge maintained closer to the second end than the cutting edge.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: July 29, 2014
    Assignee: Darex LLC
    Inventor: Daniel T. Dovel
  • Patent number: 8661952
    Abstract: It is an object of the present invention to provide a cutting machine capable of keeping an angle of a cutting edge constant. A support block 14 is provided with two arms 14a, 14b which are spaced at a certain angle, and the arms 14a, 14b have rotation shafts 12a, 13a of rotary whetstones 12, 13, respectively, extending upright from the vicinities of the front ends thereof. The rotary whetstones 12, 13 has, at front ends thereof, flat surfaces 12b, 13b perpendicular to the rotation shafts 12a, 13a to grind the one side 11b and the other side 11c of the cutting edge 11a of the cutting blade 11, respectively. The whetstone holding mechanism 15 can be moved linearly along the guide shaft 16 and can change over grinding states in which the flat surfaces 12b, 13b of the rotary whetstones 12, 13 into contact with the one side 11b or the other side 11c of the cutting blade 11.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: March 4, 2014
    Assignee: Shima Seiki Mfg., Ltd.
    Inventors: Reiji Arikita, Kenji Ikoma
  • Patent number: 8491361
    Abstract: A hand-held tool for resurfacing wiper blades which may be utilized with the wiper blade still installed on a vehicle. The tool includes a case having a rectangular cross section. Enclosed within the case are two resurfacing stones: a first resurfacing stone having a rougher surface and a second polishing stone for applying a final finish to the wiper blade. One or more float springs are situated inside the case and between the resurfacing stones to apply pressure to the stones and to assure that appropriate resurfacing pressure is applied to the wiper blade.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: July 23, 2013
    Inventor: Michael Sylvester
  • 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: 8323077
    Abstract: A blade sharpening assembly generally including a pair of clamping members disposable in coextensive relationship, each providing end portions for receiving a blade therebetween with a cutting edge thereof disposed beyond the ends thereof; means interengaging the clamping members functional as a fulcrum in permitting the end portions to displace in clamping a blade therebetween; means interconnecting the clamping members for angularly displacing the clamping members about the fulcrum; a guide member pivotally connected to a second end portion of each of the clamping members, pivotal between a first position disposed coextensively with a connected clamping member, and a second position at an angle relative to the connected clamping member, alignable with the guide member of the other of the clamping members, when the clamping members are disposed in coextensive; means interconnectable between the guide members when the guide members are disposed in alignment for releasably retaining the guide members in alignm
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: December 4, 2012
    Assignee: Taylor Brands, LLC
    Inventor: Keith Michael Nakoff
  • Patent number: 8303381
    Abstract: A clamping-type knife sharpener is designed with anti-rocking blade holding capability. The knife sharpener includes first and second clamping members and a clamping member adjustment mechanism configured to adjustably manipulate the clamping members into clamping engagement with a knife blade to be sharpened. The knife blade is maintained by the clamping members in orientation with a planar knife sharpener axis extending along a centerline of the knife blade that passes through an edge of the knife blade. First and second deformable clamping boots are respectively disposed on the first and second clamping members. The first and second clamping boots have respective first and second clamping faces adapted to engage the knife blade when the clamping members are in the clamping engagement with the knife blade. At least one of the clamping faces has a blade-conforming contour that substantially conforms to a surface contour of the knife blade and restrains the knife blade against rocking during sharpening.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: November 6, 2012
    Assignee: Arthur Lansky Levine & Associates
    Inventor: Edward A. Schwartz
  • Patent number: 8262438
    Abstract: An apparatus for sharpening a knife comprising a clamping mechanism for holding the knife and a base rod mounted adjacent and perpendicular to said clamping mechanism. Two sharpening blocks are located on either side of the clamping mechanism and are slidably mounted on guide rods extending vertically from the base rod. The guide rods are movably fixed to any point along the base rod and can be moved about the selected point in two directional planes that are perpendicular to each other.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: September 11, 2012
    Inventors: Clay A. Allison, Douglas E. Kennemore
  • Publication number: 20110230124
    Abstract: The present invention relates to a device and a method for sharpening and cleaning a safety razor blade. The device comprises a polymer-based mat and either one or more polymer-based holding elements (21-24) for holding the safety razor blade in a fixed relationship with the device, or a pair of guiding tracks (4,4?) being arranged so that least part of the polymer-based mat is arranged between said pair of guiding tracks. The guiding tracks and the polymer-based mat are arranged relative to each other in such a way that the guiding tracks define a maximum allowed penetration depth of the blades of the safety razor blade into the polymer-based mat. By applying the device and a method according to the present invention the lifetime of safety razor blades may be increased by a factor of up to five.
    Type: Application
    Filed: May 27, 2011
    Publication date: September 22, 2011
    Inventors: Morten Kieldsen Andersen, Bo Lander Rasmussen
  • Publication number: 20110177764
    Abstract: A clamping-type knife sharpener is designed with anti-rocking blade holding capability. The knife sharpener includes first and second clamping members and a clamping member adjustment mechanism configured to adjustably manipulate the clamping members into clamping engagement with a knife blade to be sharpened. The knife blade is maintained by the clamping members in orientation with a planar knife sharpener axis extending along a centerline of the knife blade that passes through an edge of the knife blade. First and second deformable clamping boots are respectively disposed on the first and second clamping members. The first and second clamping boots have respective first and second clamping faces adapted to engage the knife blade when the clamping members are in the clamping engagement with the knife blade. At least one of the clamping faces has a blade-conforming contour that substantially conforms to a surface contour of the knife blade and restrains the knife blade against rocking during sharpening.
    Type: Application
    Filed: January 15, 2010
    Publication date: July 21, 2011
    Applicant: Arthur Lansky Levine & Associates (DBA Lansky Sharpeners)
    Inventor: Edward A. Schwartz
  • 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: 7803038
    Abstract: A knife maintenance apparatus has a substantially rectangular hone body, a length with an open end and a base end, a width, a top surface covered with an abrasive material, and a bottom surface. There is a first hone edge extending along the length of the hone body and has a first radius. The opposite edge has a second radius and is parallel to and approximately the length of the first hone edge. The first hone edge and the second hone edge are approximately the hone body width apart. There is also a rectangular base portion that has a base top surface, a base bottom surface, a base width approximate the width of the hone body. The base portion has a sliding portion adjacent to and parallel to the base top surface. The base portion is hingably attached to the hone body along the base end and has at least one adjustment hole disposed through both the base portion and the sliding portion. There is at least one adjustment pin that extends through the adjustment hole.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: September 28, 2010
    Inventor: Ronald W. Lake
  • Patent number: 7722443
    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: Grant
    Filed: January 13, 2009
    Date of Patent: May 25, 2010
    Assignee: Hantover, Inc.
    Inventor: Clark A. Levsen
  • Publication number: 20090298401
    Abstract: An abrasive sharpener having a housing supporting a pair of sharpening slots having abrasive elements mounted therein. The bottom of the housing is formed with an open V-shaped groove for supporting the housing on the edge of a table, bench and the like. The bottom further includes a pair of flat bottom surfaces separated by the V-shaped groove for supporting the housing on a flat surface. The V-shaped groove is opened ended and extends along an axis generally perpendicular to the direction that a knife edge and the like is pulled through either slot for sharpening.
    Type: Application
    Filed: March 16, 2009
    Publication date: December 3, 2009
    Inventors: Riichard S. Smith, Louis Chalfant
  • Publication number: 20090275272
    Abstract: The present invention is directed to an automatic rotation knife sharpener where the crossed sharpening rods are automatically rotated each time a knife is passed down and through the sharpener. The rotation is derived through the means of a spring steel actuator mechanism making contact with the cogwheels of the sharpening rod holders. Magnets retain the sharpening rods in place within the sharpening rod holders. Sharpening rods may be easily removed and stored in troughs on the upper surface of the protective cover. A variety of sharpening rods with different abrasive surfaces can be easily exchanged in the device.
    Type: Application
    Filed: April 28, 2009
    Publication date: November 5, 2009
    Inventor: Mario J. Bonapace
  • Publication number: 20090253356
    Abstract: A finishing device for finishing the exterior, flutes and tip of a drill bit is disclosed. The finishing device includes a containment vessel which houses an abrasive media which may have a visco-elastic component and an abrasive component. The drill bit is inserted into or through the abrasive media and rotated. A rotary member may be connected to the shank of the drill bit to provide rotation of the drill bit. The drill bit displaces the abrasive media thereby finishing the exterior, flutes, cutting edges and tip of the drill bit.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 8, 2009
    Inventor: Charles J. Petrosky
  • Publication number: 20090221214
    Abstract: Truing devices constructed and arranged for truing one or more disposable metallic blades and methods for the manufacture and use of same are disclosed herein.
    Type: Application
    Filed: January 27, 2009
    Publication date: September 3, 2009
    Inventor: Jess Martin
  • Patent number: 7507149
    Abstract: A drill bit dresser having a dresser body, a holding clamp slidably joined to the dresser body, and a sanding shoe pivotally attached to the dresser body. The dresser body has means for changing the rake angle of the sanding shoe to accommodate different drill types. A drill bit, leading end first, is inserted into the dresser body and held in a desired positioned by the holding clamp. The sanding shoe is pivoted to the dresser body and engages the drill bit leading end in a vertical up and down motion.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: March 24, 2009
    Inventor: Lawrence M. Douglas
  • 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: 7121935
    Abstract: A blade sharpener (10) comprises sharpening strip providing carriers (12) and (14) each including an obliquely extending linear sharpening strip providing rod (16) and carrier movement non-interference guiding means in the form of a slot defining formation formed by facing rail pairs (18), (20) facing one another across a slot (22). The rail pairs (18) and (20) form part of a carrier support frame (24) to which the carriers (12), (14) are mounted to be displaced in diametrically opposed directions and along the spacings formed between the rails of the rail pairs (18), (20). A crossover point (28) is defined between the rods (16) within which the cutting edge of the blade of a knife is in an abrasion fashion moved during a sharpening action. The crossover point (28) is constrained to move along a linear sharpening path extending along the slot (22) during sharpener use.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: October 17, 2006
    Inventor: Stephan Deon Pretorlus
  • Patent number: 7104876
    Abstract: An innovative cutter-grinder comprised of a base, a cutter holder, and a mobile base plate; the base plate being mounted with emery cloth before being placed on a deck of the frame to secure the emery cloth and allow easy replacement of the emery cloth; the cutter holder adapted with a roller at bottom retaining a blade for the user to hold the cutter holder to roll back and forth on the base plate to grind the cutter against the emery cloth; and an angle set plate being inserted onto slots respectively provided on both sides of the deck allowing the adjustment of the grinding angle.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: September 12, 2006
    Inventor: Kun-Meng Lin
  • Patent number: 6899606
    Abstract: A rotary grinding machine includes a rotary grinding member for grinding a workpiece on a workpiece feeding member. The grinding member is coupled with an output shaft of a motor through a drive transmission mechanism. The feeding member is coupled with the output shaft of the motor through a reduction gear mechanism, a transmission shaft and an endless tensible transmission member. To maintain an operating tension of the tensible transmission member when the feeding member is moved relative to the grinding member, a tensioning mechanism is disposed to enable effective transmission of a drive force from the reduction gear mechanism to the feeding member.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: May 31, 2005
    Inventors: Juei-Seng Liao, Pei-Lieh Chiang
  • Patent number: 6848983
    Abstract: Presented is a blade sharpener, resurfacer, and planer, for sharpening flat or beveled blades of a linear edged tool, such as a drywall finishing tool and other tools edges, such as concrete trowel blades. The device of the invention makes using a file for such tasks much more precise, and much safer.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: February 1, 2005
    Inventors: Roy C. Gallegos, Gerald B. Gallegos
  • Patent number: 6824457
    Abstract: An angle-measurement assist device suitable for a visual inspection to determine a blade angle of a dental scaler is provided with a holder having a flat face thereof adapted to be in contact with a bladed portion of the scaler, a permanent magnet mounted to the holder, and first, second and third pins projecting from the holder in the directions which are perpendicular to one another, whereby an operator is permitted to make a visual inspection to determine whether the scaler is sharpened to have a target blade angle on the basis of an extending direction of the first pin, with the assist device magnetically retained on the scaler.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: November 30, 2004
    Assignee: Kazuko Himeno
    Inventors: Kazuko Himeno, Hiroshi Himeno
  • Patent number: 6814652
    Abstract: A method for sharpening the cutting knives of a knife ring chipper, which includes a knife ring and a number of knife units, the units in turn containing knives and holding plates. The knife ring is removed from the knife ring chipper, the knife units of the knife ring chipper are removed from the knife ring and the knife units are disassembled. The dull knives are moved to a first buffer station and are stored and then moved to a grinder and sharpened. The sharpened knives are moved to a second buffer station and are stored, and the sharpened knives are then mounted onto holding plates in knife units. The knife units are incorporated into a knife ring and the knife ring is incorporated into a knife ring chipper.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: November 9, 2004
    Assignee: B. Maier Zerkleinerungstechnik GmbH
    Inventor: Robert Loth
  • Patent number: 6663475
    Abstract: A tool support device for use in a belt grinding apparatus (1), the apparatus including, a drive motor (60), a drive shaft (61) and an abrasive belt arranged to be driven by the drive motor, (60) the tool support device (10) including a primary carriage (20) including a plurality of mounting zones (22, 23, 24) thereon, each mounting zone being adapted to receive a primary working tool assembly, (40, 41, 42), one or more of the primary tool assemblies including a secondary carriage (46) operatively mounted to the primary carriage (20) at one or respective one of the mounting zones (22, 23, 24) the primary carriage (20) being mounted for rotary movement so that it can adopt a plurality of working positions, wherein in each working position one of the primary working tools can be selectively disposed at a work station in an operative position, the secondary carriage (46) having a plurality of additional working tools thereon, the secondary carriage (46) being adapted for rotary movement relative to the primary c
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: December 16, 2003
    Inventor: John Lewis Price
  • Patent number: 6595837
    Abstract: A cutlery device is provided having a blade with a sharpened edge and an opposite, unsharpened back. The cutlery device also includes a tang extending from the blade which is at least partially enclosed in a handle. The tang has a tapered thickness to produce a cutlery device that is balanced when grasped with some fingers on the handle and some fingers on the blade. The back of the blade is curved so that a finger may be comfortably pressed against the back. The handle is curved for comfort and pieces of the handle are secured on the tang with rivets of varying length to accommodate the shape of the handle. A sharpening aid is also provided for the cutlery device which has at least one angled wall for positioning a sharpening surface at a sharpening angle, permitting the cutlery device to be held with the blade positioned vertically during a sharpening operation.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: July 22, 2003
    Assignee: Whirlpool Corporation
    Inventors: Gregory O. Raklovits, Lawrence A. Doggett, David A. Swinden
  • Publication number: 20030134583
    Abstract: Presented is a blade sharpener, resurfacer, and planer, for sharpening flat or beveled blades of a linear edged tool, such as a drywall finishing tool and other tools edges, such as concrete trowel blades. The device of the invention makes using a file for such tasks much more precise, and much safer.
    Type: Application
    Filed: December 17, 2002
    Publication date: July 17, 2003
    Inventors: Roy C. Gallegos, Gerald B. Gallegos
  • Patent number: 6368196
    Abstract: A blade sharpener comprises a work surface consisting of a single support line. A grinding wheel defines a plane that contains the support line. The grinding wheel is swingable in the grinding wheel plane to a selected position relative to the support line. A blade is supported on the support line in a manner that produces a first cutting surface on the blade cutting edge. The single support line enables mulching blades to be sharpened without having to impart angular motions in space to them as they are fed past the grinding wheel. The grinding wheel is swingable to different positions relative to the support line, thereby enabling the grinding wheel to produce different cutting surfaces on the blades. Swinging of the grinding wheel is achieved by mounting it to a plate that pivots about an axis perpendicular to the grinding wheel plane. A mobile work table having a top plate of finite area is selectively retainable over and removable from the single line support.
    Type: Grant
    Filed: January 3, 2000
    Date of Patent: April 9, 2002
    Assignee: Magna-Matic Corporation
    Inventor: Gerd F. Bauer
  • Publication number: 20010029670
    Abstract: A cutlery device is provided having a blade with a sharpened edge and an opposite, unsharpened back. The cutlery device also includes a tang extending from the blade which is at least partially enclosed in a handle. The tang has a tapered thickness to produce a cutlery device that is balanced when grasped with some fingers on the handle and some fingers on the blade. The back of the blade is curved so that a finger may be comfortably pressed against the back. The handle is curved for comfort and pieces of the handle are secured on the tang with rivets of varying length to accommodate the shape of the handle. A sharpening aid is also provided for the cutlery device which has at least one angled wall for positioning a sharpening surface at a sharpening angle, permitting the cutlery device to be held with the blade positioned vertically during a sharpening operation.
    Type: Application
    Filed: April 9, 2001
    Publication date: October 18, 2001
    Inventors: Gregory O. Raklovits, Lawrence A. Doggett, David A. Swinden
  • Patent number: 6241595
    Abstract: This invention is a sharpening device for lawn edger blades. The device is specifically designed for attachment to the machine and in use for when the machine is in operation. The reason for this is to keep the cutting edge of the blade continually sharp. The attachment is positioned near the cutting edge and sharpens the blade as it rotates. A manual switch or lever activates the sharpener as the user desires. The sharpener includes a caliper with an abrasive surface to squeeze against the rotating blade while the edger is in operation.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: June 5, 2001
    Inventor: Richard Skinner
  • Patent number: 6146257
    Abstract: A manually-operated sharpening apparatus includes a sharpening member for sharpening a sharpened member such as a dental instrument, a guide member for guiding the sharpened member so as to be movable therealong, and a positioning-assist element for permitting an operator to dispose the sharpened member at a location at which a predetermined angle is formed between the sharpened member and the sharpening member. With use of the sharpening apparatus, the operator can easily sharpen a blade of the sharpened member at a desired blade angle.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: November 14, 2000
    Assignees: Kazuko Himeno, Hakusui Trading Co., Ltd.
    Inventors: Kazuko Himeno, Hiroshi Himeno
  • Patent number: 6116995
    Abstract: An object of the present invention is to provide an apparatus which is suitable for sharpening the drill bits of both the power drill and hand drill. Additionally, the operation of said apparatus is simple, and the sharpening is accurate.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: September 12, 2000
    Inventor: Yu Yi Chao
  • Patent number: 6074293
    Abstract: Apparatus is described for surface finishing complex and simple surface shapes by abrasion of select zones of the surface, leaving contiguous zones unfinished. The apparatus is simple in construction and required little in training for operation. The apparatus includes an abrasive surface, which in cross-sectioned profile is negative image of the surface zone to be abraded of finished, and a relief surface corresponding to the zone or zone to remain unfinished.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: June 13, 2000
    Inventor: Larry P. Bleier
  • Patent number: 6030281
    Abstract: A sharpening apparatus for sharpening blades of tools and other implements such as spatulas and grill scrapers. The sharpening apparatus includes a base member on which a sharpening stone is positioned. A slidable blade guide member is slidably connected to the base member. The slidable blade guide member includes a guide surface that is disposed at an angle relative to the upper surface of the sharpening stone, and a mounting mechanism for removably mounting a spatula against the guide surface such that the scraping edge of the spatula is in engagement with the sharpening stone. The slidable blade guide member is manually slidable back and forth to sharpen the scraping edge of the spatula. A fixed blade guide member is also attached to the base member.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: February 29, 2000
    Assignee: Cozzini, Inc.
    Inventors: Ivo Cozzini, Thomas Spino
  • Patent number: 5944592
    Abstract: A sharpener apparatus includes a base, a linear bearing assembly mounted on the base, and a support block carried by the bearing assembly for reciprocating movement along a rectilinear path relative to the base. A planar abrasive surface underlies the support block which has one or more open channels for receiving workpieces in sliding relation with the longitudinal axes of the workpiece preferably inclined to the abrasive surface. A pusher member is supported by the support block adjacent each channel for applying a constant force longitudinally of the corresponding workpiece to urge its tip against the abrasive surface. Manual or powered reciprocating movement of the support block effects an abrasive action of the workpiece tips against the abrasive surface to form a highly accurate and repeatable tip geometry, such as a chisel point, on each workpiece.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: August 31, 1999
    Assignee: Underwriters Laboratories Inc.
    Inventors: Jeffrey B. Hall, William D. Parker
  • Patent number: 5704829
    Abstract: A compact, hand-held tool for safely deburring the edges of a skate blade. The tool utilizes a pair of resiliently biased deburring surfaces which are movable between an open position and a closed position. The deburring surfaces are resiliently biased in the open position by a biasing means such as a leaf spring. In the open position, any size or shape skate blade can be readily inserted between the deburring surfaces. A user can apply pressure between his/her thumb and fingers to engage the deburring surfaces against the skate blade edges. The width of the skate blade determines the extent of the closed position. In the closed position the tool can be manipulated back and forth along the length of the skate blade to simultaneously deburr both edges.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: January 6, 1998
    Inventor: Jim Long
  • Patent number: 5582535
    Abstract: An apparatus for sharpening the edge of an elongated object includes a housing having an exposed sharpening section with a sharpening element in the sharpening section. The sharpening element is formed from a single abrasive coated sharpening element having a pair of abrasive coated planar comb-like structures formed along opposing sides of the sharpening element. The sharpening element is bent into an X configuration wherein the alternating teeth and slots interdigitate to form the X-shaped configuration and form a sharpening angle between the interdigitating teeth. The sharpening angle has a bisection line with an elongated interrupted sharpening surface.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 10, 1996
    Assignee: Edgecraft Corporation
    Inventor: Daniel D. Friel
  • Patent number: 5547419
    Abstract: Blade-sharpening apparatus includes a blade holder that is axially and pivotably movable on an upright post, to enable controlled manual movement of a clamped blade in contact with a sharpening stone supported on an underlying base. The means by which the clamping head is mounted permits adjustment of declination, for producing the desired blade-edge angle, and it permits pivoting of the head for maintaining optimal contact between the blade and the surface of the stone.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: August 20, 1996
    Inventor: Andrew M. Hulnicki
  • Patent number: 5520574
    Abstract: A device for sharpening dental instruments is disclosed. The device is particularly advantageous for sharpening and shaping dental curettes and universals. The device is comprised of a generally rectangular and elongate wedge-shaped ceramic stone. The stone has a planar front surface and a planar back surface, the surfaces are obliquely positioned with respect to each other. A rounded top lip and a rounded bottom lip join the front surface and the back surface. The top surface has a groove, semicircular in cross-section, extending lengthwise. The groove is sized to receive the toe portion of dental curettes or universals for sharpening and shaping.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: May 28, 1996
    Inventor: Roselyn Wilson