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Publication numberUS3797334 A
Publication typeGrant
Publication dateMar 19, 1974
Filing dateOct 25, 1972
Priority dateOct 25, 1972
Publication numberUS 3797334 A, US 3797334A, US-A-3797334, US3797334 A, US3797334A
InventorsB Sinclair
Original AssigneeB Sinclair
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sharpening device
US 3797334 A
Abstract
A sharpening device for sharpening arrowheads, knives and the like comprising a support block having a pair of spaced apart elongated grooves extending downwardly into the upper end thereof. Each of the grooves communicates with an elongated bore formed in the block. A sharpening means such as a file or the like is positioned in each of the bores and is disposed at an angle with respect to the upper end of the support block. The sharpening means are adapted to sharpen the arrowhead or the like upon the arrowhead being inserted downwardly into the groove and moved along the sharpening means. The grooves define a guide means to properly position the arrowhead in the proper attitude with respect to the sharpening means. A modified form of the sharpening device is disclosed and comprises a triangular shaped sharpening means positioned in a channel formed in the upper end of the support block.
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Description  (OCR text may contain errors)

United States Patent [1 1 Sinclair 1111 3,797,334 [451 Mar. 19, 1974 1 SHARPENING DEVICE 22 Filed: 0a. 25, 1972 21 Appl. No.: 300,519

[52] US. Cl, 76/88, 51/214 [51] Int. Cl ..B21k 5/06 [58] Field of Search 76/82, 82.1, 82.2, 83, 76/86, 88; 51/214, 221 BS, 285

[56] References Cited UNITED STATES PATENTS 942,959 12/1909 Emery 76/88 323,146 7/1885 Hilton, 76/82.2 2,141,359 12/1938 McKittrick... 76/82.1 1,451,526 4/1923 Bowles 76/86 1.417.054 5/1922 Graf 76/88 2951,400 9/1960 Renne. Jr. et a1. 76/86 FOREIGN PATENTS OR APPLICATIONS 587.881 12/1959 Canada 76/83 2.821 1912 Great Britain 76/82.2

Primary ExaminerLeonidas Vlachos Attorney, Agent, or Firm-Zarley, McKee & Thomte [57] ABSTRACT A sharpening device for sharpening arrowheads, knives and the like comprising a support block having a pair of spaced apart elongated grooves extending downwardly into the upper end thereof. Each of the grooves communicates with an elongated boreformed in the block. A sharpening means such as a file or the like is positioned in each of the bores and is disposed at an angle with respect to the upper end of the support block. The sharpening means are adapted to sharpen the arrowhead or the like upon the arrowhead being inserted downwardly into the groove and moved along the sharpening means. The grooves define a guide means to properly position the arrowhead in the proper attitude with respect to the sharpening means. A modified form of the sharpening device is disclosed and comprises a triangular shaped sharpening means positioned in a channel formed in the upper end of the support block. V

4 Claims, 4 Drawing Figures drawings, in which:

1 SHARPENING DEVICE BACKGROUND or THE INVENTION This invention relates to a sharpening device and more particularly to a sharpening device for sharpening arrowheads, knives, etc. It is frequently necessary to sharpen arrowheads, hunting knives, etc. in the field since the devices become dull during use thereof. Many sharpening devices have been previously designed but none of the previously available sharpening devices are convenient to use in the field or are convenient to carry in the field. Further, the conventional sharpening devices do not include means for properly positioning the arrowhead or knife with respect to the sharpening element so that the proper edge is formed thereon.

Therefore, it is a principal object of the invention to provide an improvedsharpening device.

A further object of the invention is to provide a sharpening device for use in field sharpening arrowheads, knives, etc.

A further object of the invention is to provide a sharpening device which is compact.

A further object of the invention is to provide a sharpening device which permits the sharpening element thereon to be easily replaced.

A further object of the invention is to provide a sharpening device having guide means thereon for properly positioning the member to be sharpened.

A further object of the invention is to provide a sharpening device which is economical in manufacture, durable in use and refined in appearance.

Theseand other objects will be apparent to those skilled in the art.

BRI F DESCRIPTION OF THE DRAWINGS This invention consists in the construction, arrangements and combination of the various parts of the device, whereby theobjects contemplated are attained as hereinafter more fully set forth, specifically pointed out in the claims, and illustrated in the accompanying FIG. 1 is a top perspective view of the sharpening device of this invention illustrating the manner in which an arrowhead is sharpened:

FIG. 2 is a sectional view seen along lines 2-2of FIG. 1:

FIG. 3 is an enlarged sectional view similar to FIG. 3 except that the opposite sharpening element is being employed; and f FIG. 4 is a sectional view similar to FIG. 2 except that a modified form of the invention is disclosed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. l-3, the numeral generally refers to the preferred embodiment of this invention. Sharpening device 10 comprises a support block 12 comprised of wood, plastic, etc. A pair of elongated grooves 14 and 16 extend downwardly into the upper end 18 of block 12 as illustrated in FIG. 2. Grooves 14 and 16 communicate with elongated bores and 17 respectively. Groove 14 is defined by a vertically disposed wall 20 and an inclined wall 22. Likewise, groove 16 is defined by a vertically disposed wall 24 and an inclined wall 26.

An elongated sharpening means 128 in the form of a file or the like is positioned in the groove 14 and is maintained against the inclined wall 22 and in the slot 29 by a screw 30 extending inwardly from one side of the block 12 as illustrated in FIGS. 2 and 3. An elongated sharpening means 30 is positioned in the groove 16 and is maintained against the inclined wall 26 and in the slot v31 by means of a screw 32 extending inwardly from the other side of the block 12.

The numeral 34 refers generally to an arrowhead which may be sharpened as follows. The arrowhead 34 is first extended downwardly into the groove 16 so that one side of its cutting edge is in engagement with the file 30. The side of the arrowhead is placed in engagement with the wall 24 so that the cutting edge of the arrowhead is disposed at the proper angle with respect to the file 30. The arrowhead 34 is then pulled longitudinally in one direction on the file 26 to sharpen one side of the cutting edge (FIG. 1). When the one side of one cutting edge has been sharpened, the arrowhead 34 is placed in the groove 14 so as to sharpen the other side of the cutting edge as illustrated in FIG. 3. The arrow: head 34 is moved longitudinally in one direction on the file 28 until that side of the cutting edge is sharpened. The arrowhead 34 is then rotated 180 about the rotational axis of theshaft and the sharpening operation continued in both of the grooves 14 and 16 to sharpen the opposite side of the arrowhead. t

In FIG. 4, the numeral 10' generally designates a modified form of the sharpeningdevice. The numeral 36 refers to an elongated channel which is formed in the block 12 and which extends downwardly into the upper surface thereof. A triangular shaped sharpening device in form of a file or the like is positioned in the channel 36 and is referred to generally by the reference numeral 38. Shoulders 40 and 42 extend horizontally into the upper end of the channel 3 6 as seen in FIG. 4. The. arrowhead or knife may be sharpened by simply extending the cutting edge thereofdownwardly into the channel 36 on either side of the file 38 to sharpen the opposite sides of the cutting edges. The shoulders 40 and 42 are provided so that the arrowhead or knife can be placed thereagainst to position the cutting edge of the. knife or arrowhead in the proper attitude withrespect to the file38. The opposite sides of the file 38 should be disposed at approximately 22 with respect to the inner ends ofshoulders 40 and 42.'Likewise, the files 28 and 30 should be disposed at approximately 22 with respect to the walls 20 and 24 respectively.

Thus it can be seen that a compact sharpening device has been provided which efficiently sharpens arrowheads, hunting knives, et'c. The files in the devices are easily replaced as desired. It can therefore be seen that the devices accomplish all of their stated objectives.

l. A sharpening device comprising, a support means having anupper end, and an elongated cavity formed therein extending downwardly thereunto,

an elongated sharpening means in said cavity adapted to sharpen the cutting element of a member extending downwardly into said cavity, said cavity being defined by an elongated groove formed in the upper end of said support means and an elongated bore formed in said support :means below said groove and being in communication therewith, said groove having a vertically disposed wall and an inclined wall, said sharpening means being maintained adjacent said inclined wall, I

maintain said sharpening means in said cavity.

4. The device of claim 1 wherein a second cavity is formed in said support means spaced from the first mentioned cavity, and a second sharpening means in said second cavity, said sharpening means in said cavities being oppositely disposed with respect to each other.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US323146 *Jul 28, 1885 James w
US942959 *Mar 3, 1908Dec 14, 1909Benjamin F EmeryKnife-sharpener.
US1417054 *Mar 14, 1921May 23, 1922Frank X IrrKnife sharpener
US1451526 *Jun 29, 1921Apr 10, 1923Bowles Byron EKnife sharpener
US2141359 *Oct 18, 1937Dec 27, 1938Mckittrick Samuel ALawn mower sharpener
US2951400 *Jun 2, 1958Sep 6, 1960Jordan Edward CArrowhead sharpener
CA587881A *Dec 1, 1959Ernest J TomsSkate sharpener
GB191202821A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4078455 *Apr 4, 1977Mar 14, 1978Brody John FBroadhead arrow sharpening accessory
US4228703 *Mar 2, 1979Oct 21, 1980Moss Donald CDevice for sharpening arrowheads
US4512111 *Oct 26, 1982Apr 23, 1985Childers Don AKnife blade sharpener
US4696129 *May 27, 1986Sep 29, 1987Roberts Timothy AFor simultaneously engaging discrete broadhead blades
US4747235 *Mar 6, 1987May 31, 1988Priebe Raymond GDevice for sharpening broadheads
US4835910 *Aug 10, 1987Jun 6, 1989Truangle Broadhead Hones, Inc.Honing device
US5157879 *May 16, 1990Oct 27, 1992Fletcher Engineering, Inc.Broadhead arrow sharpener
US5189749 *Mar 3, 1992Mar 2, 1993Thomas Design & Engineering Services, Inc.For use with an archery arrow
US6059645 *Apr 29, 1998May 9, 2000Levine; Arthur L.Hand-held sharpening device
US6251003Jan 31, 2000Jun 26, 2001Levine Arthur L.Hand-held sharpening device
US6361408 *May 4, 2000Mar 26, 2002Larry P. BleierMethod and apparatus for finishing surfaces
US6398901 *Oct 6, 1999Jun 4, 2002Donald C. HodgeSharpening guide assembly configured for wear resistance and method of manufacturing same
US6949018 *Nov 16, 2001Sep 27, 2005Bleier Larry PApparatus for finishing surfaces
US7052385Sep 6, 2003May 30, 2006Ronald SwartzSelf-aligning blade angle guide
US8360407Mar 14, 2011Jan 29, 2013Progressive International CorporationCutting board with scrap bin
WO1997004909A1 *Aug 1, 1996Feb 13, 1997Larry P BleierApparatus for finishing surfaces
Classifications
U.S. Classification76/88, 451/555
International ClassificationB24D15/00, B23D67/00, B23D67/10, B24D15/08
Cooperative ClassificationB24D15/08, B23D67/10
European ClassificationB24D15/08, B23D67/10