U.S. patent application number 14/320375 was filed with the patent office on 2015-12-31 for knife sharpening device for circular knife.
The applicant listed for this patent is Donwei Machinery Ind. Co., Ltd.. Invention is credited to Pi-chao CHANG.
Application Number | 20150375353 14/320375 |
Document ID | / |
Family ID | 54929527 |
Filed Date | 2015-12-31 |
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United States Patent
Application |
20150375353 |
Kind Code |
A1 |
CHANG; Pi-chao |
December 31, 2015 |
KNIFE SHARPENING DEVICE FOR CIRCULAR KNIFE
Abstract
A knife sharping device for a circular knife contains: a
circular body, a circular connecting cover, and a first circular
fixing cover. The circular body includes an annular portion and an
external wheel, the annular portion has a through hole and a first
conical face, the first conical face has a thickness gradually
increasing to the outer rim of the annular portion from the central
portion of the annular portion, the first conical face also has a
plurality of first sharpening tabs equidistantly arranged thereon.
The circular connecting cover includes a first side lid and an
inserting post, a cross section of which is non-circular. The first
circular fixing cover includes a second side lid, a first
positioning member, and a first pressing loop; wherein a cross
section of the first positioning member is non-circular, and the
first positioning member has a first orifice defined thereon.
Inventors: |
CHANG; Pi-chao; (Taichung
City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Donwei Machinery Ind. Co., Ltd. |
Taichung City |
|
TW |
|
|
Family ID: |
54929527 |
Appl. No.: |
14/320375 |
Filed: |
June 30, 2014 |
Current U.S.
Class: |
76/85 |
Current CPC
Class: |
B24B 3/46 20130101 |
International
Class: |
B24B 3/46 20060101
B24B003/46 |
Claims
1. A knife sharping device for a circular knife comprising: a
circular body including an annular portion and an external wheel
arranged around an outer rim of the annular portion, wherein the
annular portion has a through hole defined at a central portion
thereof and a first conical face formed on a first side thereof,
and the first conical face has a thickness gradually increasing to
the outer rim of the annular portion from the central portion of
the annular portion, the first conical face also has a plurality of
first sharpening tabs equidistantly arranged thereon; a circular
connecting cover including a first side lid and an inserting post
extending outwardly from a central position of the first side lid,
wherein a cross section of the inserting post is non-circular; a
first circular fixing cover including a second side lid, a first
positioning member extending outwardly from a central position of
an inner surface of the second side lid, and a first pressing loop
extending outwardly from the inner surface of the second side lid
and located outside the first positioning member, wherein a cross
section of the first positioning member is non-circular, and the
first positioning member has a first orifice defined thereon.
2. The knife sharping device for the circular knife as claimed in
claim 1, wherein the plurality of first sharpening tabs are made of
ceramic material.
3. The knife sharping device for the circular knife as claimed in
claim 1, wherein the first side lid has a first griping bar formed
on an outer side thereof; and the second side lid has a second
griping bar arranged on an outer side thereof.
4. The knife sharping device for the circular knife as claimed in
claim 1 further comprising a second circular fixing cover, and the
second circular fixing cover including a third side lid, a second
positioning member extending outwardly from a central position of
an inner surface of the third side lid, and a second pressing loop
extending outwardly from the inner surface of the third side lid
and located outside the third positioning member, wherein a cross
section of the second positioning member is non-circular, and the
second positioning member has a second orifice defined thereon, a
cross section of the second orifice is non-circular and corresponds
to the profile of the inserting post.
5. The knife sharping device for the circular knife as claimed in
claim 4, wherein the annular portion of the circular body also has
a second conical face defined on a second side thereof opposite to
the first conical face, and the second conical face has a thickness
gradually increasing to the outer rim of the annular portion from
the central portion of the annular portion, the second conical face
has a plurality of second sharpening tabs equidistantly arranged
thereon.
6. The knife sharping device for the circular knife as claimed in
claim 5, wherein the plurality of second sharpening tabs are made
of ceramic material.
7. The knife sharping device for the circular knife as claimed in
claim 5, wherein the plurality of first sharpening tabs are
adjacent to the external wheel, and the plurality of second
sharpening tabs are adjacent to the through hole.
8. The knife sharping device for the circular knife as claimed in
claim 4, wherein the third side lid has a third griping bar
arranged on an outer side thereof.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a knife sharpening device,
and more particularly to a knife sharpening device for a circular
knife.
BACKGROUND OF THE INVENTION
[0002] A conventional circular knife is applied to cut an object
linearly by matching with a ruler or a board-foot, and a circular
blade of the conventional circular knife is dull after a period of
using time, so it is sharpened by a belt grinding machine. But, the
circular blade is rotated repeatedly during a sharpening process to
cause uneven sharpening effect. A conventional knife sharpening
device for a circular knife is disclosed in U.S. Pat. No. 8,267,752
and contains a body, an inserting block inserted into a first side
of the body, and a supporting block mounted on a second side
thereof and inserted into the inserting block, wherein the
supporting block is arranged to position a circular blade, and a
circular sharpening piece is formed on a peripheral side of the
body to sharpen the circular blade easily.
[0003] Nevertheless, after the circular sharpening piece sharpens
the circular piece for a long period of time, it damages
easily.
[0004] The present invention has arisen to mitigate and/or obviate
the afore-described disadvantages.
SUMMARY OF THE INVENTION
[0005] The primary object of the present invention is to provide a
knife sharpening device for a circular knife which avoids damaging
a first conical face and prolongs service life of the first conical
face.
[0006] Another object of the present invention is to provide a
knife sharpening device for a circular knife which is capable of
sharpening various circular blades.
[0007] To obtain the above objective, a knife sharpening device for
a circular knife provided by the present invention contains: a
circular body, a circular connecting cover, and a first circular
fixing cover.
[0008] The circular body includes an annular portion and an
external wheel arranged around an outer rim of the annular portion,
wherein the annular portion has a through hole defined at a central
portion thereof and a first conical face formed on a first side
thereof, and the first conical face has a thickness gradually
increasing to the outer rim of the annular portion from the central
portion of the annular portion, the first conical face also has a
plurality of first sharpening tabs equidistantly arranged
thereon.
[0009] The circular connecting cover includes a first side lid and
an inserting post extending outwardly from a central position of
the first side lid, wherein a cross section of the inserting post
is non-circular.
[0010] The first circular fixing cover includes a second side lid,
a first positioning member extending outwardly from a central
position of an inner surface of the second side lid, and a first
pressing loop extending outwardly from the inner surface of the
second side lid and located outside the first positioning member,
wherein a cross section of the first positioning member is
non-circular, and the first positioning member has a first orifice
defined thereon.
[0011] The foregoing, as well as additional objects, features and
advantages of the invention will be more readily apparent from the
following detailed description, which proceeds with reference to
the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a perspective view showing the exploded components
of a knife sharpening device for a circular knife according to a
first embodiment of the present invention.
[0013] FIG. 2 is a perspective view showing the assembly of the
knife sharpening device for the circular knife according to the
first embodiment of the present invention.
[0014] FIG. 3 is another perspective view showing the assembly of
the knife sharpening device for the circular knife according to the
first embodiment of the present invention.
[0015] FIG. 4 is a cross sectional view showing the assembly of the
knife sharpening device for the circular knife according to the
first embodiment of the present invention.
[0016] FIG. 5 is a perspective view showing the operation of the
knife sharpening device for the circular knife according to the
first embodiment of the present invention.
[0017] FIG. 6 is a perspective view showing the exploded components
of a knife sharpening device for a circular knife according to a
second embodiment of the present invention.
[0018] FIG. 7 is a cross sectional view showing the assembly of the
knife sharpening device for the circular knife according to the
second embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0019] With reference to FIGS. 1-5, a knife sharping device 100 for
a circular knife according to a first embodiment comprises: a
circular body 10, a circular connecting cover 20, and a first
circular fixing cover 30.
[0020] Referring to FIGS. 1 and 2, the circular body 10 includes an
annular portion 11 and an external wheel 12 arranged around an
outer rim of the annular portion 11, wherein the annular portion 11
has a through hole 111 defined at a central portion thereof and a
first conical face 112 formed on a first side thereof, and the
first conical face 112 has a thickness gradually increasing to the
outer rim of the annular portion 11 from the central portion of the
annular portion 11, the first conical face 112 also has a plurality
of first sharpening tabs 113 equidistantly arranged thereon
adjacent to the external wheel 12 and made of ceramic material.
[0021] As shown in FIGS. 1 to 3, the circular connecting cover 20
includes a first side lid 21 and an inserting post 22 extending
outwardly from a central position of the first side lid 21, wherein
a cross section of the inserting post 22 is non-circular, the first
side lid 21 has a first griping bar 211 formed on an outer side
thereof.
[0022] The first circular fixing cover 30 includes a second side
lid 31, a first positioning member 32 extending outwardly from a
central position of an inner surface of the second side lid 31, and
a first pressing loop 33 extending outwardly from the inner surface
of the second side lid 31 and located outside the first positioning
member 32, wherein a cross section of the first positioning member
32 is non-circular, and the first positioning member 32 has a first
orifice 34 defined thereon, a cross section of the first orifice 34
is non-circular and corresponds to a profile of the inserting post
22, the second side lid 31 has a second griping bar 311 arranged on
an outer side thereof.
[0023] As illustrated in FIG. 4, in operation, for example, as
desiring to sharpen a first circular blade 91 with a first locating
aperture 911 (a profile of the first locating aperture 911
corresponds to that of the first positioning member 32), the
inserting post 22 of the circular connecting cover 20 is inserted
into the through hole 111 of the circular body 10, and the first
positioning member 32 of the first circular fixing cover 30 is
inserted into the first locating aperture 911 of the first circular
blade 91 to position the first circular blade 91 and the first
circular fixing cover 30 together, and the inserting post 22 of the
circular connecting cover 20 is further inserted into the first
orifice 34 of the first circular fixing cover 30 so that the
circular connecting cover 20, the first circular fixing cover 30,
and the first circular blade 91 are connected together, and the
circular body 10 rotates along the inserting post 22.
[0024] Referring further to FIG. 5, the first griping bar 211 of
the circular connecting cover 20 and the second griping bar 311 of
the first circular fixing cover 30 are gripped by a user, the
external wheel 12 of the circular body 10 is contacted with a flat
surface and is rotated reciprocately so that the first circular
blade 91 is pressed by the first pressing loop 33 to abut against
the plurality of first sharpening tabs 113, and the plurality of
first sharpening tabs 113 rotate with the circular body 10 to
sharpen the first circular blade 91. Thereafter, the first circular
blade 91 is turned upside down and is positioned on the first
positioning member 32 of the first circular fixing cover 30, the
first circular fixing cover 30 and the circular connecting cover 20
are connected together again to rotate repeatedly, thus sharpening
the first circular blade 91 completely.
[0025] Accordingly, the first circular blade 91 is sharpened
completely by the plurality of first sharpening tabs 113 and does
not contact the first conical face 112 to avoid damaging the first
conical face 112 and to prolong service life of the first conical
face 112.
[0026] With reference to FIGS. 6 and 7, a difference of a knife
sharping device 100 of a second embodiment from that of the first
embodiment comprises: a second circular fixing cover 40, the second
circular fixing cover 40 includes a third side lid 41, a second
positioning member 42 extending outwardly from a central position
of an inner surface of the third side lid 41, and a second pressing
loop 43 extending outwardly from the inner surface of the third
side lid 41 and located outside the third positioning member 42,
wherein a cross section of the second positioning member 42 is
non-circular, and the second positioning member 42 has a second
orifice 44 defined thereon, a cross section of the second orifice
44 is non-circular and corresponds to the profile of the inserting
post 22, the third side lid 41 has a third griping bar 411 arranged
on an outer side thereof. The annular portion 11 of the circular
body 10 also has a second conical face 114 defined on a second side
thereof opposite to the first conical face 112, and the second
conical face 114 has a thickness gradually increasing to the outer
rim of the annular portion 11 from the central portion of the
annular portion 11, the second conical face 114 has a plurality of
second sharpening tabs 115 equidistantly arranged thereon adjacent
to the through hole 111 and made of ceramic material.
[0027] As illustrated in FIG. 7, as desiring to sharpen a second
circular blade 92 with a second locating aperture 921 (a profile of
the second locating aperture 921 corresponds to that of the second
positioning member 42), the inserting post 22 of the circular
connecting cover 20 is inserted into the through hole 111 of the
circular body 10, and the second positioning member 42 of the
second circular fixing cover 40 is inserted into the second
locating aperture 921 of the second circular blade 91 to position
the second circular blade 91 and the second circular fixing cover
40 together, thereafter the inserting post 22 of the circular
connecting cover 20 is further inserted into the second orifice 44
of the second circular fixing cover 40 so that the circular
connecting cover 20, the second circular fixing cover 40, and the
second circular blade 92 are connected together, and the circular
body 10 rotates along the inserting post 22, such that the second
circular blade 92 is pressed by the second pressing loop 43 to abut
against the plurality of second sharpening tabs 115, and the
plurality of second sharpening tabs 115 rotate with the circular
body 10 to sharpen the second circular blade 92. Thereafter, the
second circular blade 92 is turned upside down and is positioned on
the second positioning member 42 of the second circular fixing
cover 40, the second circular fixing cover 40 and the circular
connecting cover 20 are connected together again to rotate
repeatedly, thus sharpening the second circular blade 92
completely.
[0028] Thereby, the knife sharping device is capable of sharpening
various circular blades (such as the first circular blade and the
second circular blade).
[0029] While the preferred embodiments of the invention have been
set forth for the purpose of disclosure, modifications of the
disclosed embodiments of the invention as well as other embodiments
thereof may occur to those skilled in the art. Accordingly, the
appended claims are intended to cover all embodiments which do not
depart from the spirit and scope of the invention.
* * * * *