KR101086984B1 - Portable type grinder assembly - Google Patents

Portable type grinder assembly Download PDF

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Publication number
KR101086984B1
KR101086984B1 KR1020090042427A KR20090042427A KR101086984B1 KR 101086984 B1 KR101086984 B1 KR 101086984B1 KR 1020090042427 A KR1020090042427 A KR 1020090042427A KR 20090042427 A KR20090042427 A KR 20090042427A KR 101086984 B1 KR101086984 B1 KR 101086984B1
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South Korea
Prior art keywords
grindstone
whetstone
portable
case
guide groove
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KR1020090042427A
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Korean (ko)
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KR20100123284A (en
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강석만
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강석만
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Priority to KR1020090042427A priority Critical patent/KR101086984B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
    • B24D15/065—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges for sharpening both knives and scissors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/52—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of shear blades or scissors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

본 발명은 휴대형 숫돌 조립체에 관한 것으로, 휴대형 숫돌 조립체에 있어서; 일측에 파지부를 갖고, 타측에는 서로 간격을 두고 교차되게 숫돌안내홈이 형성된 케이스와; 상기 숫돌안내홈에 삽입되며, 양측변에는 다수의 톱니형 걸림턱이 형성되고, 상단에는 손잡이가 형성되며, 양측면에는 인조다이아몬드가 도금융착된 막대형 숫돌과; 상기 케이스를 관통하여 상기 각 숫돌안내홈에 노출되고, 상기 숫돌의 톱니형 걸림턱에 걸림되어 상기 숫돌의 인출길이를 조절하도록 상기 케이스에 나사고정된 조절나사를 포함하여 구성된다.The present invention relates to a portable whetstone assembly, comprising: a portable whetstone assembly; A case having a gripping portion on one side and a grindstone guide groove formed on the other side to be spaced apart from each other; The whetstone is inserted into the grindstone guide groove, a plurality of jagged engaging jaw is formed on both sides, a handle is formed on the upper side, and a rod-shaped grindstone with artificial diamonds on both sides; Passing through the case is exposed to each of the grindstone guide groove, is configured to include an adjustment screw screwed to the case to be caught in the sawtooth engaging jaw of the grindstone to adjust the lead length of the grindstone.

본 발명에 따르면, 연마구를 이동시킬 수 있어 연마를 위한 접점이 한 곳에 집중되지 않음으로써 경도와 강도가 높은 인조다이아몬드를 코팅하여 사용할 수 있음으로 연마 효율이 급격히 향상되고, 반영구적 사용이 가능하며, 구조적으로 간단하고, 제조가 용이하며, 휴대의 편의성이 증진된 효과를 얻을 수 있다.According to the present invention, since the polishing tool can be moved so that the contact point for polishing is not concentrated in one place, the artificial diamond having high hardness and strength can be coated to be used, thereby greatly improving the polishing efficiency and semipermanently. It is possible to obtain an effect that is structurally simple, easy to manufacture, and enhanced in portability.

휴대형, 숫돌, 조립체, 연마구, 가변, 다이아몬드, 연마 효율 Portable, Sharpener, Assembly, Grinding Wheel, Variable, Diamond, Polishing Efficiency

Description

휴대형 숫돌 조립체{PORTABLE TYPE GRINDER ASSEMBLY}Portable whetstone assembly {PORTABLE TYPE GRINDER ASSEMBLY}

본 발명은 휴대형 숫돌 조립체에 관한 것으로, 보다 상세하게는 휴대가 용이하고 반영구적으로 사용할 수 있도록 개선된 휴대형 숫돌 조립체에 관한 것이다.The present invention relates to a portable whetstone assembly, and more particularly, to a portable whetstone assembly that is improved to be portable and semipermanently used.

일반적으로, 숫돌은 금속 등을 연마할 때 사용되는 도구의 일종으로, 주로 가정이나 목공소 등에서 칼이나 가위 또는 작업도구들의 날을 날카롭게 연마하는데 사용되는 도구를 의미한다.In general, a grindstone is a kind of tool used to polish metal and the like, and refers to a tool used to sharpen a blade of a knife or scissors or work tools mainly at home or a woodworking shop.

특히, 가정에서 칼이나 가위의 날을 연마하기 위해 사용되는 숫돌(칼갈이)은 보통 도 1의 예시와 같이, 세라믹 또는 스텐리스 스틸의 연마구(10)를 V형상으로 서로 겹친 후 그 사이로 칼이나 가위 등의 날(20)을 통과시켜 날카롭게 연마하도록 된 고정형 타입으로 되어 있다.In particular, a grindstone (knitting) used to grind a blade of a knife or scissors at home usually overlaps each other with a V-shaped polishing tool 10 of ceramic or stainless steel, as shown in FIG. It is of the fixed type which is made to sharply grind through the blade 20, such as scissors.

즉, 연마구(10)의 교차점에 날(20)이 접점되는 3접점 방식의 연마 구조이다.That is, it is a three-contact polishing structure in which the blade 20 is in contact with the intersection point of the polishing tool 10.

그런데, 이러한 구조의 기존 숫돌은 연마구(10)가 고정된 타입이기 때문에 항상 일정한 지점만 집중적으로 접촉된 채 날(20)과 마찰되기 때문에 종래 무른 재질의 칼날 등은 어느 정도 연마되기는 하지만 여러 번 사용하게 되면 연마기능이 현저히 떨어지게 된다.By the way, the conventional grinding wheel of such a structure is a fixed type of the polishing tool 10, so that only a fixed point is always in contact with the blade 20 in intensive contact with the blade 20 of the conventional soft material, such as a certain degree of grinding, but several times If used, the polishing function is significantly reduced.

특히, 최근의 주방용 칼들은 강도가 강한 특수 스테인리스 스틸로 만들어지고 있는 추세여서 기존과 같은 구조의 연마구(10)를 갖는 숫돌로서는 연마할 수 없다는 한계에 도달하였다.In particular, the recent kitchen knives have reached the limit that can not be polished with a grinding wheel having a grinding wheel 10 of the same structure as the trend is made of a special stainless steel with a strong strength.

이를 해결하기 위해서는 강도가 더 높은 인조다이아몬드가 코팅된 V형 숫돌(칼갈이)를 만들면 되지만 기존과 같은 구조에서는 집중적으로 한 지점만 마찰되면서 연마되기 때문에 코팅된 인조다이아몬드가 쉽게 탈거되고, 이는 숫돌(칼갈이)로서의 기능을 할 수 없다는 것을 의미하므로 그러한 구조로 제조할 수는 없었다.To solve this problem, you can make a V-shaped grindstone (knitting) coated with a higher strength artificial diamond, but in the same structure, the coated artificial diamond is easily removed because it is polished by intensively rubbing one point. Since it cannot function as), it could not be manufactured in such a structure.

본 발명은 상술한 바와 같은 종래 기술상의 제반 문제점들을 감안하여 이를 해결하고자 창출된 것으로, 숫돌(칼갈이)에 장착되는 연마구를 고정형이 아닌 이동형으로 구성하여 날과 접점되는 부위를 선택적으로 가변시킬 수 있음으로써 반영구적으로 활용할 수 있고, 또한 구조가 간단하고 가벼워 휴대가 용이할 뿐만 아니라 제조도 용이하고 비용도 저렴한 새로운 형태의 휴대형 숫돌 조립체를 제공함에 그 주된 해결 과제가 있다.The present invention was created in view of the above-mentioned problems in the prior art as described above, and the grinding wheel mounted on the grindstone (knife) can be configured to move the contact instead of the fixed type to selectively change the site of contact with the blade. The main problem is to provide a new type of portable whetstone assembly that can be used semi-permanently, and its structure is simple and light, which is easy to carry, easy to manufacture, and low cost.

본 발명은 상기한 해결 과제를 달성하기 위한 수단으로, 휴대형 숫돌 조립체에 있어서; 일측에 파지부를 갖고, 타측에는 서로 간격을 두고 교차되게 숫돌안내홈이 형성된 케이스와; 상기 숫돌안내홈에 삽입되며, 양측변에는 다수의 톱니형 걸림턱이 형성되고, 상단에는 손잡이가 형성되며, 양측면에는 인조다이아몬드가 도금융착된 막대형 숫돌과; 상기 숫돌의 톱니형 걸림턱에 걸림되어 상기 숫돌의 인출길이를 조절하도록 상기 케이스에 나사고정된 조절나사를 포함하여 구성되는 것을 특징으로 하는 휴대형 숫돌 조립체를 제공한다.The present invention as a means for achieving the above object, in the portable grindstone assembly; A case having a gripping portion on one side and a grindstone guide groove formed on the other side to be spaced apart from each other; The whetstone is inserted into the grindstone guide groove, a plurality of jagged engaging jaw is formed on both sides, a handle is formed on the upper side, and a rod-shaped grindstone with artificial diamonds on both sides; It is provided with a portable grindstone assembly, characterized in that it comprises an adjustment screw screwed to the case to be caught on the sawtooth engaging jaw of the grindstone to adjust the withdrawal length of the grindstone.

본 발명에 따르면, 연마구를 이동시킬 수 있어 연마를 위한 접점이 한 곳에 집중되지 않음으로써 경도와 강도가 높은 인조다이아몬드를 코팅하여 사용할 수 있음으로 연마 효율이 급격히 향상되고, 반영구적 사용이 가능하며, 구조적으로 간단 하고, 제조가 용이하며, 휴대의 편의성이 증진된 효과를 얻을 수 있다.According to the present invention, since the polishing tool can be moved so that the contact point for polishing is not concentrated in one place, the artificial diamond having high hardness and strength can be coated to be used, thereby greatly improving the polishing efficiency and semipermanently. It is structurally simple, easy to manufacture, and the effect of enhanced portability can be obtained.

이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

도 2는 본 발명에 따른 숫돌 조립체의 예시적인 단면도이고, 도 3은 본 발명에 따른 숫돌 조립체에 사용되는 숫돌의 예시도이며, 도 4는 본 발명에 따른 숫돌 조립체의 조절나사 설치구조를 보인 예시적인 단면도이다.Figure 2 is an exemplary cross-sectional view of the whetstone assembly according to the present invention, Figure 3 is an illustration of the whetstone used in the whetstone assembly according to the present invention, Figure 4 is an illustration showing the adjustment screw installation structure of the whetstone assembly according to the present invention. Section.

도 2에 도시된 바와 같이, 본 발명에 따른 숫돌 조립체는 케이스(100)를 포함한다.As shown in FIG. 2, the whetstone assembly according to the present invention includes a case 100.

상기 케이스(100)는 일측에 손가락을 넣어 잡을 수 있도록 공간이 마련된 상태로 파지부(110)가 형성된다.The case 100 has a gripping portion 110 is formed in a state where a space is provided to put a finger on one side.

따라서, 사용자는 칼 등을 연마할 때에는 수평면에 케이스(100)의 저면을 맞댄 상태에서 상기 파지부(110)를 견고히 파지한 후 원하는 연마 작업을 안정적으로 수행할 수 있게 되며, 또한 휴대 이동시에도 상기 파지부(110)를 잡고 이동할 수 있음은 물론 크기가 충분히 작기 때문에 가방 등에 수납한 채 보관하기도 쉽다.Therefore, when grinding a knife or the like, the user can firmly grip the holding part 110 in a state where the bottom surface of the case 100 is placed on a horizontal surface, and stably perform a desired polishing operation. The grip portion 110 can be held and moved, of course, because the size is small enough to be stored in a bag or the like.

그리고, 도 2 내지 도 4에 도시된 바와 같이, 상기 케이스(100), 바람직하게는 상기 파지부(110)의 대향측에 대략 V형상을 이루도록 서로 엇갈리게 숫돌안내홈(200)이 형성된다.And, as shown in Figures 2 to 4, the grinding wheel guide grooves 200 are formed alternately to form a substantially V shape on the opposite side of the case 100, preferably the holding portion 110.

이때, 상기 숫돌안내홈(200)은 상기 케이스(100)의 상단에서부터 하단에 이르기까지 길게 형성됨이 바람직하다.At this time, the grinding wheel guide groove 200 is preferably formed long from the top to the bottom of the case 100.

아울러, 상기 숫돌(300)은 막대 형상을 가지며, 양측면에 연마면이 형성되고, 양측변에는 톱니형 걸림턱(320)이 형성되며, 상단에는 손잡이(310)가 마련된다.In addition, the whetstone 300 has a rod shape, the polishing surface is formed on both sides, the sawtooth engaging jaw 320 is formed on both sides, the handle 310 is provided on the top.

그리하여, 숫돌(300)이 상기 숫돌안내홈(200)에 끼워졌을 때 칼날 진행방향으로 연마면끼리 교차되게 배치되어 있어 이 연마면을 통해 칼날이 연마되게 된다.Thus, when the grindstone 300 is fitted to the grindstone guide groove 200, the polishing surfaces are arranged to cross each other in the blade traveling direction, and the blade is polished through the polishing surface.

여기에서, 상기 숫돌(300)은 소재를 주물로 만든 후 크롬, 니켈 등으로 도금을 먼저 하고, 그 소재를 별도의 화학용액에 침진한 다음 이어 인조다이아몬드를 전기분해방식으로 융착하여 제조되기 때문에 막대형 숫돌(300) 전체에 걸쳐 인조다이아몬드 코팅을 쉽게 할 수 있다.Here, the grindstone 300 is made of a material made of a casting and then plated with chromium, nickel, etc., and then the material is immersed in a separate chemical solution, and then the artificial diamond is fused by electrolysis. Artificial diamond coating can be easily performed over the large grinding wheel 300.

그리고, 상기 케이스(100)의 양측면에는 이를 관통하여 상기 숫돌안내홈(200)으로 돌출되는 조절나사(400)가 구비된다.And, on both sides of the case 100 is provided with a control screw 400 that protrudes through the grinding wheel guide groove 200 through it.

상기 조절나사(400)는 케이스(100)의 벽면을 관통하여 상기 숫돌(300)의 톱니형 걸림턱(320)에 걸림되는 구조를 갖게 되는데 이를 통해 칼날 연마 작업시 숫돌(300)이 움직이지 않고 견고히 지지된 상태로 연마 작업을 수행할 수 있게 된다.The adjustment screw 400 has a structure that is penetrated through the wall surface of the case 100 to the jagged engaging jaw 320 of the grindstone 300 through which the grindstone 300 does not move during the blade grinding operation It is possible to carry out the polishing operation in a firmly supported state.

뿐만 아니라, 상기 조절나사(400)를 조이고 푸는 것에 의해 상기 숫돌(300)을 상하방향으로 위치이동시킬 수 있어 칼날이 연마되는 숫돌(300)의 연마면을 바꿀 수 있게 된다.In addition, by tightening and loosening the adjustment screw 400, the grinding wheel 300 can be moved in the vertical direction, thereby changing the grinding surface of the grinding wheel 300 to which the blade is polished.

특히, 좌측 숫돌과 우측 숫돌 및 칼날이 교차되는 연마 접점은 채 1mm도 안되기 때문에 그 부분만 집중적으로 마모되게 되는데, 본 발명에서는 예컨대 톱니형 걸림턱(320)을 3mm 간격으로 15개 형성할 경우 숫돌의 전체 길이는 45mm에 해당되 므로 15칸을 이동시키면서 숫돌(300)의 일측 연마면을 다 쓴 후 빼낸 다음 반대쪽 연마면을 동일한 방식으로 15칸 이동시키면서 사용하게 되면 전,후 연마면을 다 쓸때까지 총 30번을 사용할 수 있어 1세트 구매시 30세트 구매 효과가 있어 매우 경제적이며, 거의 반영구적으로 사용할 수 있게 된다.Particularly, the abrasive contact point at which the left grindstone and the right grindstone and the blade intersect is less than 1 mm, so that only the part is worn out intensively. Since the total length of is equivalent to 45mm, one side of the grindstone (300) is used while moving 15 spaces, and then removed, and then the other side of the grinding surface is moved 15 spaces in the same way. You can use a total of 30 times, so if you buy one set, you can buy 30 sets, which is very economical and almost semi-permanent.

이러한 구성으로 이루어진 본 발명에 따른 숫돌 조립체는 주부들이 가족동반 나들이나 혹은 휴가철 여행할 때 상시 휴대하면서 쉽게 사용할 수 있다.The whetstone assembly according to the present invention having such a configuration can be easily used while housewives are always carrying with family members or when traveling on vacation.

그리고, 조절나사(400)를 해체하여 숫돌(300)을 케이스(100)로부터 완전히 분리할 수도 있으므로 휴대의 용이성이 더욱 향상된다.In addition, since the grinding wheel 300 may be completely separated from the case 100 by disassembling the adjusting screw 400, the ease of portability is further improved.

뿐만 아니라, 숫돌(300)의 숫돌안내홈(200)에 끼운 후 조절나사(400)를 조이기만 하면 쉽게 조립되므로 사용상 편의성도 향상되고, 또 숫돌(300)의 연마면을 가변시킬 수 있으므로 항상 동일한 지점이 연마되지 않아 인조다이아몬드 코팅 부분이 탈락되지도 않아 수명도 연장되며, 연마 효율도 현격히 향상된다.In addition, it is easy to assemble simply by tightening the adjustment screw 400 after being inserted into the grindstone guide groove 200 of the grindstone 300, so that the convenience of use is also improved, and the grinding surface of the grindstone 300 can be varied so that the same Since the point is not polished, the artificial diamond coating is not dropped, thereby extending the service life and significantly improving the polishing efficiency.

도 1은 종래 고정형 숫돌의 모식도인 단면도,1 is a schematic cross-sectional view of a conventional fixed whetstone,

도 2는 본 발명에 따른 숫돌 조립체의 예시적인 단면도,2 is an exemplary cross-sectional view of a whetstone assembly in accordance with the present invention;

도 3은 본 발명에 따른 숫돌 조립체에 사용되는 숫돌의 예시도,3 is an illustration of a whetstone used in a whetstone assembly according to the present invention;

도 4는 본 발명에 따른 숫돌 조립체의 조절나사 설치구조를 보인 예시적인 단면도.Figure 4 is an exemplary cross-sectional view showing the adjustment screw installation structure of the grindstone assembly according to the present invention.

♧ 도면의 주요 부분에 대한 부호의 설명 ♧♧ description of the symbols for the main parts of the drawing ♧

100....케이스 200....숫돌안내홈100 .... case 200 ....

300....숫돌 400....조절나사300 ... Wheel 400 ... Adjustment screw

Claims (1)

휴대형 숫돌 조립체에 있어서;A portable whetstone assembly comprising: 일측에 파지부를 갖고, 타측에는 서로 간격을 두고 교차되게 숫돌안내홈이 형성된 케이스와;A case having a gripping portion on one side and a grindstone guide groove formed on the other side to be spaced apart from each other; 상기 숫돌안내홈에 삽입되며, 양측변에는 다수의 톱니형 걸림턱이 형성되고, 상단에는 손잡이가 형성되며, 양측면에는 인조다이아몬드가 도금융착된 막대형 숫돌과;The whetstone is inserted into the grindstone guide groove, a plurality of jagged engaging jaw is formed on both sides, a handle is formed on the upper side, and a rod-shaped grindstone with artificial diamonds on both sides; 상기 숫돌의 톱니형 걸림턱에 걸림되어 상기 숫돌의 인출길이를 조절하도록 상기 케이스 상에 나사고정된 조절나사를 포함하여 구성되는 것을 특징으로 하는 휴대형 숫돌 조립체.Portable grindstone assembly characterized in that it comprises an adjustment screw is screwed on the case to be caught on the sawtooth engaging jaw of the whetstone to adjust the length of extraction of the whetstone.
KR1020090042427A 2009-05-15 2009-05-15 Portable type grinder assembly KR101086984B1 (en)

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US11565375B2 (en) 2019-12-18 2023-01-31 Aob Products Company Sharpening device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440953A (en) 1994-09-22 1995-08-15 Tru Hone Corporation Knife sharpener
US6881137B2 (en) 2001-01-11 2005-04-19 Edgecraft Corporation Manual knife sharpener with angle control
US7172500B1 (en) 2006-08-24 2007-02-06 Wen-Chiu Wu Knife sharpener

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440953A (en) 1994-09-22 1995-08-15 Tru Hone Corporation Knife sharpener
US6881137B2 (en) 2001-01-11 2005-04-19 Edgecraft Corporation Manual knife sharpener with angle control
US7172500B1 (en) 2006-08-24 2007-02-06 Wen-Chiu Wu Knife sharpener

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