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Патент USA US2406519

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m. 21, 1946‘
_ 2,406,519,
gum swarm
Filed Oct. 56, 1944
¢/05£P// Mean/v
Patented Aug. 27, 1946
so, Dearth;
1944, SerialNd: scopes‘
zcie'ims. (c1; 5"i-;-2"14)-
This invention relates-‘to iailknife sharpener and
has to do particularly with: a sharpener‘ which
can: ‘be advantageously used: for homerpurposes.
A general. obj e'ctr of ' the-invention i-‘sv to‘. provide
a novel‘ and el?ci'entisharpenet coris'l‘;ructit'nfv which
will properly sharpen: a knife‘: blade: and. which
can be used. not’- only with safety" but can; be
operated by those unskilled’:
‘theartoff sharp‘;
eningl and putting an edge upon a blade.
may be replaced or one having different cutting
characteristics substituted therefor.
Means arer-providedwfor- applying pressure" to
thev blade of. a. knife and this? takes the‘ vform or
a suitable rod or post.’ IIGrs-lidably mountedi in the
hole 5- and. advantageously provided with; a1 suit
able capo'r head‘. piece H. @n: the opposite end
of‘therod; andlyin'giinvthelslot 6 is a blade em
gaging. piece; 187 suitably attached to the rod.
abrading element is employed and the device may 10 The pressure piece [8 may advantageously be
be supplied with a number of abrading elements
mounted on the rod I6 in an eccentric manner
with different cutting characteristics ranging
so that its four edges 20, 2|, 22 and 23 are lo
from a relatively coarse ?le to a ?ner cutting
cated at different distances from the center of
the post.
The accompanying drawing illustrates a sharp 15 In the operation of the device a knife blade,
ener constructed in accordance with the inven
which may be termed the work piece, as shown
tion. In the drawing:
at W, is passed into the slot with its cutting edge
Fig. 1 is a top plan view of the device.
positioned toward the abrading element. It will
Fig. 2 is a sectional view taken substantially
be noted that the slot 6 is materially wider than
on line 2-—2 of Fig. 1.
20 the thickness of the blade. The blade is moved
Fig. 3 is a sectional view taken substantially
into position under the pressure member I8. As
on line 3—-3 of Fig. 2.
a result, one side of the cutting edge of the
The sharpener takes the form of a body mem
blade is engaged by the abrading element and
ber l which may have a gripping or handle part
the other side of the blade is engaged by the
2 which can be easily held by one hand and a 25 pressure piece l8. In this position the knife
wider base portion 3. The wider base portion
blade is reciprocated back and forth in a direc
provides suitable size and strength for the hold
tion paralleling the cutting edge and thus the
ing of the abrading element and provides a base
cutting edge is sharpened by the abrading action.
area so that the device may be stored in an up
Suitable pressure may be applied by a thumb or
right position.
?nger to the top of the post l1. This will be
The body is formed with a hole or passage 5
regulated as desired. After one edge of the knife
therein and a slot 6 which intersects the pas
has been subjected to the sharpening action the
sage. For convenience of manufacture the hole
blade may be reversed so that the opposite edge
5 may pass entirely through the body with its
is placed next to the abrading element. The
lower end illustrated at 1.
Oi Oi eccentric disposition of the pressure piece I 8
The body is provided with a sort of chamber
makes it feasible to apply the knife edge with
or cavity at the bottom of the slot 6 which is
pressure at various locations on the cutting ele
de?ned by an inclined bottom wall H), the in
ment. The edge 20 may apply the pressure
clination of which is downwardly in a direction
nearest the lower edge of the abrading element
toward the opening of the slot 6. The back wall 40 while the edge 23 will extend well back toward
II and the front wall I2 of the cavity are in
the bottom of the slot 6 to apply pressure at the
clined preferably so that they are at right angles
corresponding part of the abrading element.
to the inclined bottom ID. This cavity is for the
This increases the life of the abrading element
reception of an abrading element I5 which can
as different portions ofv its surface can be used.
be slipped into and out of position through the 45 The edges of the portion 2| and 22 may apply
open sides of the cavity. The disposition of the
pressure to the intermediate portions of the ele
bottom wall I!) at an angle and the cooperating
angle on the walls I I and I2 provide an arrange
ment for the reception of an abrading element
thereof may rest upon the surface 25 of the slot
As the blade is reciprocated the body
6, while the edge engages the angularly posi
conventionally made of rectangular cross section. 50 tioned stone. The angle of the abrading element
Accordingly, the abrading element ?ts snugly in
is preferably such as to provide an ef?cient
the cavity.
sharpening and edging of the cutting edge of the
If desired, the abrading element may be per
knife. ‘
manently located or it may be arranged so that
it can be removed so that the abrading element 55
1. A'knife sharpener comprising, an elongated
gripped, said end vpart having a slot extending
partiallytherethrough transverse to the length of
‘ fbody of handle-like form adapted to be gripped
1 in the hand of the user, and having an extending
the body, said slot having a chamber in its inner
lend part beyond the portion adapted to, be so
Igripped, said end part having a slot extending
ipartially therethrough transverse to the length
}of the body, said slot having a chamber in its
‘innermost portion extending through .the body
most portion extending through the body'with'
the chamber having an inclined bottom wall, an
abrading stone in the chamber and adapted to
be pushed into position through the open end of
the chamber, said abrading stone having its lower
v :with the chamber having an inclinedAbottom
surfacewseatingupon the inclinedbottom and.
‘ iwall, an nabrading’djstone inythe ,chamberand
shaving-‘its upperisurface ‘extending angularly in
; adapted" to be" pushed; into position throfughthe"
iopen end of the‘ chamber, said lab-radin‘g stone
ihaving its lower surface seating upon the
the‘ direction‘transvers'e "of the slot, ‘whereby the
w ' edge of a knife blade passed into the slot angu
engages the surface of the abrading stone,
Iclined bottom and having its upper surface ex?" 'i1ar1y
tending angularly in the direction transverse of .7. said-body having an opening extending length
1 the slot-whereby the edge of a knife blade. passed 7
1 into the slot angularly engages the surface of the
wise through the handle part and opening into
- the'slot; a‘rod member positioned and freely slid
abrading stone, said body having an'opening ex-jr -_ _ jyable ingtheopening, a pressure piece connected
tending lengthwise through the handlevpart and ‘
1opening into the slot; a rod member positioned»
; and freely slidable in the opening, and a pressure
piece connected to the. rod and located in‘ the
islot, the exposed end of vtheirod adapted to be
pressed to urge the; pressure member against the
1 side of the knife blade to‘ in turn apply'the knife
I bladeto the cutting stone with pressure. - L2..1A knife sharepener comprising;- an elongated
j bodyof handle-like form'adapted to be gripped
‘ inthe hand of the user, and having an extending
1 end part-beyondgthe portion adapted to be so
to the rod and located in the slot, the exposed
end ‘of the rod adapted to be pressed‘ to urge
the pressure member against the side of the knife
blade to; in turn‘ apply the knife blade to the cut-s
.ting vstone with‘, pressure, said . pressure member
being-eccentrically. connected to the rod where- I
by therodmayibecturned inthe opening so that
'it maybe applied to the side of the knife blade
with the cutting, edge of the knife blade engag
ing theabrading stone at different locations
across the width thereof.‘
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