U.S. patent application number 12/381766 was filed with the patent office on 2009-12-03 for two step abrasive sharpener.
Invention is credited to Louis Chalfant, Riichard S. Smith.
Application Number | 20090298401 12/381766 |
Document ID | / |
Family ID | 40720071 |
Filed Date | 2009-12-03 |
United States Patent
Application |
20090298401 |
Kind Code |
A1 |
Smith; Riichard S. ; et
al. |
December 3, 2009 |
Two step abrasive sharpener
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.
Inventors: |
Smith; Riichard S.; (Hot
Springs, AR) ; Chalfant; Louis; (Hot Springs,
AR) |
Correspondence
Address: |
EDWARD D. GILHOOLY
28 E. JACKSON BLVD., SUITE 423
CHICAGO
IL
60604
US
|
Family ID: |
40720071 |
Appl. No.: |
12/381766 |
Filed: |
March 16, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61069649 |
Mar 14, 2008 |
|
|
|
Current U.S.
Class: |
451/321 ;
451/349 |
Current CPC
Class: |
B24D 15/08 20130101;
B24D 15/081 20130101; B24D 15/065 20130101 |
Class at
Publication: |
451/321 ;
451/349 |
International
Class: |
B24B 3/54 20060101
B24B003/54; B24B 23/08 20060101 B24B023/08 |
Claims
1. An abrasive sharpener comprising a body having at least one
sharpening slot, at one abrasive sharpening element being mounted
is said slot, and said body having a bottom for contacting a
support surface during sharpening, and said bottom is formed with
an open V-shaped configuration.
2. The abrasive sharpener according to claim 1 wherein said
V-shaped configuration of said bottom of said housing forms a pair
of angularly arranged support surfaces.
3. The abrasive sharpener according to claim 2 wherein said
V-shaped configuration is formed by an open V-shaped groove.
4. The abrasive sharpener according to claim 3 wherein said
V-shaped groove is open-ended.
5. The abrasive sharpener according to claim 4 wherein said bottom
of said housing includes a pair of flat lower surfaces, said flat
lower surfaces being separated by said V-shape groove.
6. The abrasive sharpener according to claim 4 wherein said
V-shaped groove extends along an axis generally perpendicular to
said at least one sharpening slot.
Description
[0001] This application claims priority to provisional application,
Ser. No. 61/069,649 filed Mar. 14, 2008.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] This invention relates to abrasive sharpeners, and more
particularly, more particularly, to a two-step abrasive sharpener
having a bottom V-shaped groove.
[0004] 2. Summary of the Prior Art
[0005] It is well known to use sharpeners for knives having two
steps of sharpening, namely a course grind and fine sharpening
grind. One problem associated with such sharpeners occurs when a
sharpening operation is performed on a surface, such as a table or
counter. During the normal sharpening stroke through abrasive
elements, the blade of the knife being sharpened often strikes the
counter to damage the already sharpened blade and the counter. Such
damage requires the user to repeat the sharpening of the blade.
Therefore, it is desirable in the prior art to provide an abrasive
sharpener capable of avoiding impact between the knife being
sharpened and the sharpener support surface.
SUMMARY OF THE INVENTION
[0006] It is therefore an objective of the invention to provide an
improved two-step sharpener that avoids impact between the
sharpener support surface and the blade being sharpened. The
sharpener here employs two abrasive stations created by crossed
carbide abrasive blades and crossed ceramic rods. The base of the
sharpener of the invention includes a V-shaped open groove on which
the sharpener base can be supported on the edge of a counter and
the like during a sharpening operation. Such a positioning of the
sharpener further provides for a more natural, comfortable
sharpening stroke by an individual.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 is a front elevational view of two step abrasive
sharpener of the invention;
[0008] FIG. 2 is an end elevational view of the sharpener of FIG.
1;
[0009] FIG. 3 is an bottom plan view of the sharpener of FIG. 1;
and
[0010] FIG. 4 is an opposite end elevational view of the sharpener
of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT
[0011] Referring now to FIGS. 1-4, there is illustrated the
two-step abrasive sharpener of the invention, generally designated
by reference numeral 2. The sharpener 2 has a housing 4 formed with
opposite concave cut-out portions 6 (FIGS. 1 and 2) to provide
handle areas to permit a user to grasp and support the sharpener 2
while sharpening a knife. A pair of upper slots 10a,10b (FIG. 1)
are created in upper portion 12 of housing 4 and respectively have
V-slots in the form of a pair of crossed ceramic abrasive rods 14
and a pair of crossed carbide abrasive blades 16. The abrasive rods
14 and the abrasive blades 16 are respectively mounted in slots 10a
and 10b in a conventional manner well known in the art. The rods 14
provide a fine sharpening cut for straight or serrated edges as the
blade is pulled through slot 10a, while blades 16 perform a more
course sharpening cut to a blade. The blade having an edge being
sharpened is pulled across the housing in either slots 10a or slot
10b for sharpening while the handle areas 6 are manually
gripped.
[0012] The bottom 20 of housing 4 has a pair of spaced flat base
surfaces 22 extending the length of housing 4. The flat surfaces 22
are centrally separated by a V-shaped open groove or slot 24 that
extends the length of base 4 generally perpendicular to the
direction of movement of the blade being sharpened through slots
10a or 10b and has open ends as seen in FIGS. 1-3. The V-groove 24
includes a pair of sloped flat surfaces 26 and 28 lying at a
selected angle, such as 90.degree. to each together, and the
surfaces 26 and 28 are of generally equal widths that are
alternatively arranged to bear directly against a support surface
(not shown) such as a table, counter, bench or the like, at its
edge during a sharpening operation. Either surface 26 or surface 28
may be used to contact the edge of the support surface as desired.
It should be apparent that the base is supported on either surfaces
26 or surface 28 of groove 24 as the sharpener 2 bears against the
counter or table edge while the sharpener 2 is held by the user in
one hand. The user can then move a knife (not shown) through a
selected slot 10a or slot 10b with the other hand. Because of the
positioning of the sharpener 2 at the edge of the table or counter,
damaging contact between a knife and a counter during a sharpening
stroke is avoided. Further, a more natural, comfortable sharpening
stroke for the user occurs as a result of sharpener being on the
edge of the counter or table. The sharpener 2 can also be supported
on a flat surface by housing surfaces 22 in an orientation flat on
a table, bench, counter, and the like.
* * * * *