AU2010101072B4

AU2010101072B4 - Knife Sharpening tool

Info

Publication number: AU2010101072B4
Application number: AU2010101072A
Authority: AU
Inventors: Shih-Piao Wu
Original assignee: Jiin Haur Industrial Co Ltd
Current assignee: Jiin Haur Industrial Co Ltd
Priority date: 2010-10-01
Filing date: 2010-10-01
Publication date: 2016-09-15
Anticipated expiration: 2018-10-01
Also published as: AU2010101072A4

Abstract

A knife sharpening tool includes a main base (30), a sucker (10) mounted on the main base and attached to a surface (70), and a grinding unit (40) mounted on the main base for grinding a blade (74) of a cutting tool (72). 5 Thus, the knife sharpening tool is attached to a surface so that a user only needs to hold the cutting tool to grind the blade, thereby facilitating the user grinding the blade. In addition, the user only needs to hold the cutting tool by his one hand to grind the blade without having to hold the knife sharpening tool by his other hand, thereby preventing the user's hand from being injured by the blade 10 so as to protect the user's safety. (Fig. 2)

Description

KNIFE SHARPENING TOOL

Field of the Invention

The present innovation relates to a hand tool, and more particularly to a sharpening tool for grinding a blade of a cutting tool, such as a knife or the like.

Background of the Invention A conventional grindstone is used to grind a blade of a cutting tool (such as a knife or the like) when the blade is worn or rusted. However, the grinding angle between the blade of the cutting tool and the grindstone cannot be controlled easily, thereby causing inconvenience to a user when grinding the blade of the cutting tool, and thereby decreasing the grinding effect of the grindstone. A conventional knife sharpening tool comprises a support seat, and a grindstone mounted on the support seat to grind the blade of the cutting tool. However, the user has to hold the support seat by one hand and to hold the cutting tool by another hand when grinding the blade of the cutting tool, thereby causing inconvenience to the user when grinding the blade of the cutting tool, and thereby easily causing danger to the user.

Object of the Invention

It is an object of the present invention to substantially overcome or at least ameliorate one or more of the disadvantages of the prior art, or to at least provide a useful alternative.

Summary of the Invention

There is firstly disclosed herein a blade sharpening tool, comprising: a base; a sucker, mounted on the base, operable to fix the base to a supporting surface; a grinding unit mounted on the base for sharpening a blade of a cutting tool, the grinding unit including two grindstones juxtaposed to each other to form a grinding space to receive the blade of the cutting tool, the grindstones each having a grinding surface, with the grinding surfaces converging downward towards the base and between which the space is located, the surfaces positioned to engage the blade to be sharpened by movement of the blade past the surfaces in a blade sharpening direction; a cover mounted to the base, the cover including a generally planar cover surface and a pair of protuberances extending upwardly away from said cover surface and the base, said protuberances being spaced laterally of said grinding space; and wherein at least one said protuberance extends beyond said space in said blade sharpening direction.

Preferably, the base has an opening between the first side and the second side of the base; the first side of the base has a periphery formed with an outwardly extending edge to press a periphery of the sucker, in use; the second side of the base has a surface provided with a mounting seat; the mounting seat of the base has an inner portion formed with an insertion hole; the grinding unit is mounted on the mounting seat of the base and is inserted into and partially protruded outward from the insertion hole of the mounting seat to extend past the cover surface, in use.

Preferably, the cover includes a ramp; the ramp of the cover has a side provided with an auxiliary grindstone; the cover has an inner portion formed with a passage to be connected to the insertion hole of the mounting seat to allow passage of the grinding unit.

Preferably, the first side of the base has a surface formed with a substantially hexagonal through hole connected to the opening of the base; the sucker has a surface provided with a substantially hexagonal pull lever extended through the through hole of the base into the opening of the base; the pull lever of the sucker is movably mounted in the through hole of the base; a control handle is mounted on the sucker and abuts the base to control movement of the sucker; the control handle is pivotally mounted in the opening of the base and has a first portion formed with a pivot seat pivotally mounted on the pull lever of the sucker and a second portion formed with a handlebar; and the pivot seat of the control handle has a side formed with an eccentrically arranged press block pressing the first side of the base.

Preferably, the base has a substantially L-shaped profile.

The present innovation at least in a preferred aspect provides a blade sharpening tool that is operated easily and conveniently.

The blade sharpening tool is attached to a surface so that a user only needs to hold the cutting tool to grind the blade, thereby facilitating the user grinding the blade of the cutting tool.

The user only needs to hold the cutting tool by his one hand to grind the blade without having to hold the blade sharpening tool by his other hand, thereby preventing the user's hand from being injured by the blade of the cutting tool so as to protect the user's safety.

The knife sharpening tool can be directly attached to a horizontal surface or a vertical surface so that the blade sharpening tool is operated and stored easily and quickly, thereby facilitating the user operating the blade sharpening tool, and thereby saving the space of storage of the blade sharpening tool.

Further benefits and advantages of the present innovation will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

Brief Description of the Drawings A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, wherein:

Fig. 1 is a perspective view of a blade sharpening tool in accordance with the preferred embodiment of the present innovation.

Fig. 2 is an exploded perspective view of the blade sharpening tool as shown in

Fig. 1.

Fig. 3 is a front cross-sectional view of the blade sharpening tool as shown in

Fig. 1.

Fig. 4 is a schematic operational view of the blade sharpening tool as shown in

Fig. 3.

Fig. 5 is a schematic operational view of the blade sharpening tool as shown in

Fig. 1.

Fig, 6 is a schematic operational view of the blade sharpening tool as shown in

Fig. 1.

Detailed Description of the Preferred Embodiments

Referring to the drawings and initially to Figs. 1-3, a blade sharpening tool in accordance with the preferred embodiment of the present innovation comprises a base 30, a sucker 10 mounted on the base 30 and attached to a surface 70 to attach the base 30 to the surface 70, and a grinding unit 40 mounted on the base 30 for grinding and finishing a blade 74 (see Fig, 5) of a cutting tool 72, such as a knife, scissors, saw or the like.

The base 30 has a substantially L-shaped profile and has a first side 36 and a second side 37. Movement of a blade 74 from the second side 37 to the first side 36 defines a blade sharpening direction A. The base 30 has an opening 32 defined between the first side 36 and the second side 37 of the base 30. The first side 36 of the base 30 has a surface formed with a substantially hexagonal through hole 31 connected to the opening 32 of the base 30. The first side 36 of the base 30 has a periphery formed with an outwardly extending press edge 35 to press in use a periphery of the sucker 10. The first side 36 of the base 30 has an inner portion formed with a receiving space 38 connected to the through hole 31 of the base 30 to receive the sucker 10. The second side 37 of the base 30 is perpendicular to the first side 36 of the base 30 and has a surface provided with a mounting seat 33. The mounting seat 33 of the base 30 has an inner portion formed with an insertion hole 34.

The grinding unit 40 is mounted on the mounting seat 33 of the base 30 and is inserted into and partially protruded outward from the insertion hole 34 of the mounting seat 33, The grinding unit 40 includes two laminating tapered grindstones 42. The two grindstones 42 of the grinding unit 40 are juxtaposed to each other to form a grinding space 43 to receive the blade 74 of the cutting tool 72. Each grindstone 42 having grinding surfaces converging downward toward the base 30 and between which the space 43 is located. The surfaces positioned to engage a blade 74 to be sharpened by movement past the surfaces in a blade sharpening direction A.

The sucker 10 has a vacuum suction force and has a surface provided with a substantially hexagonal pull lever 11 extended through the through hole 31 of the base 30 into the opening 32 of the base 30. The pull lever 11 of the sucker 10 is movably mounted in the through hole 31 of the base 30.

The blade sharpening tool further comprises an elastic member 20 mounted on the pull lever 11 of the sucker 10 and biased between the base 30 and the sucker 10, a control handle 50 mounted on the sucker 10 and abutting the base 30 to control movement of the sucker 10, and a cover 60 mounted on the mounting seat 33 of the base 30 to cover the opening 32 of the base 30. The elastic member 20 is received in the receiving space 38 of the base 30.

The control handle 50 is pivotally mounted in the opening 32 of the base 30 and has a first portion formed with a pivot seat 51 pivotally mounted on the pull lever 11 of the sucker 10 and a second portion formed with a handlebar 53. The pivot seat 51 of the control handle 50 has a side formed with an eccentrically arranged press block 52 pressing the first side 36 of the base 30. The press block 52 of the control handle 50 is movable eccentrically relative to the base 30 between a first position as shown in Fig. 3 where the press block 52 of the control handle 50 is spaced from the base 30 to release the sucker 10 and a second position as shown in Fig. 4 where the press block 52 of the control handle 50 presses the first side 36 of the base 30 to lift the pull lever 11 of the sucker 10 so as to compress the sucker 10 by the press edge 35 of the base 30.

As best seen in Figure 2, the cover 60 has an inner portion formed with a passage 61 to be connected to the insertion hole 34 of the mounting seat 33 to allow passage of the grinding unit 40, so that the grinding unit 40 is exposed and protruded outward from the passage 61 of the cover 60. The cover 60 includes a generally planar surface 100 and two protuberances 62a, 62b extending perpendicularly away from the surface 100 and the base 30, The protuberances 62a, 62b are spaced laterally of the grinding space 43. In one embodiment, the protuberances 62a, 62b in the form of limit plates surround the passage 61 of the cover 60 and the grinding unit 40 to limit movement of the grinding unit 40. In one embodiment, the cover 60 has a surface provided with a ramp 63 abutting one limit plate 62b. The ramp 63 of the cover 60 has a side provided with an auxiliary grindstone 64. In an embodiment at least one protuberance 62a extends beyond the space 43 in the blade sharpening direction A. In another embodiment both protuberances 42 extend away from the space 43 in the blade sharpening direction A. This location extending beyond the space 43 aids in the sharpening of the blade 74.

Figures 3 and 4 show cross sectional views of Figure 1 taken along A- A in Figure 2. The direction of view of those cross sections is towards the ramp 63 taken from the middle of cover 60 in line with space 43 and screw 100. As shown in Fig. 3, the press block 52 of the control handle 50 is spaced from the base 30 to release the sucker 10.

As shown in Fig. 4, when the control handle 50 is pivoted on the pull lever 11 of the sucker 10, the press block 52 of the control handle 50 is moved eccentrically to press the first side 36 of the base 30 to lift the pull lever 11 of the sucker 10 so as to compress the sucker 10 by the press edge 35 of the base 30 to form a vacuum space between the sucker 10 and the surface 70 so as to attach the sucker 10 to the surface 70 so that the sucker 10 is bonded onto the surface 70 closely and exactly. In Figure 4 the handle 50 has been shown in phantom lines to assist the reader.

As shown in Fig. 5, the sucker 10 is attached to a horizontal surface (not shown), so that the blade 74 of the cutting tool 72 is ground by the grinding unit 40 in a horizontal manner. If the edge of the blade 74 produces burrs, the blade 74 of the cutting tool 72 can be placed on and ground by the auxiliary grindstone 64 of the cover 60 to remove the burrs on the edge of the blade 74. Then, the blade 74 of the cutting tool 72 can be placed on and ground by the grinding unit 40.

As shown in Fig. 6, the sucker 10 is attached to a vertical surface (not shown), so that the blade 74 of the cutting tool 72 is ground by the grinding unit 40 in a vertical manner.

Accordingly, the blade sharpening tool is attached to a surface so that a user only needs to hold the cutting tool 72 to grind the blade 74, thereby facilitating the user grinding the blade 74 of the cutting tool 72. In addition, the user only needs to hold the cutting tool 72 by his one hand to grind the blade 74 without having to hold the blade sharpening tool by his other hand, thereby preventing the user's hand from being injured by the blade 74 of the cutting tool 72 so as to protect the user's safety. Further, the blade sharpening tool can be directly attached to a horizontal surface or a vertical surface so that the blade sharpening tool is operated and stored easily and quickly, thereby facilitating the user operating the blade sharpening tool, and thereby saving the space of storage of the blade sharpening tool.

The terms “comprise(s)” and “comprising” as used in the specification and claims mean "consisting at least in part of, that is to say when interpreting statements in the specification and claims which include any of those terms, the features, prefaced by any of those terms in each statement, all need to be present but other features can also be present.

Throughout the specification, unless the context requires otherwise, the word “comprise” or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

Although the innovation has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present innovation, It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the innovation.

Claims

The claims defining the innovation are as followings:

1. A blade sharpening tool, comprising: a base; a sucker, mounted on the base, operable to fix the base to a supporting surface; a grinding unit mounted on the base for sharpening a blade of a cutting tool, the grinding unit including two grindstones juxtaposed to each other to form a grinding space to receive the blade of the cutting tool, the grindstones each having a grinding surface, with the grinding surfaces converging downward towards the base and between which the space is located, the surfaces positioned to engage the blade to be sharpened by movement of the blade past the surfaces in a blade sharpening direction; a cover mounted to the base, the cover including a generally planar cover surface and a pair of protuberances extending upwardly away from said cover surface and the base, said protuberances being spaced laterally of said grinding space; and wherein at least one said protuberance extends beyond said space in said blade sharpening direction.
2. The blade sharpening tool of claim 1, wherein: the base has an opening between a first side and a second side of the base; the first side of the base has a periphery formed with an outwardly extending edge to press a periphery of the sucker, in use; the second side of the base has a surface provided with a mounting seat; the mounting seat of the base has an inner portion formed with an insertion hole; the grinding unit is mounted on the mounting seat of the base and is inserted into and partially protruded outward from the insertion hole of the mounting seat to extend past the cover surface, in use.
3. The blade sharpening tool of claim 2, wherein the cover includes a ramp; the ramp of the cover has a side provided with an auxiliary grindstone; the cover has an inner portion formed with a passage to be connected to the insertion hole of the mounting seat to allow passage of the grinding unit.
4. The blade sharpening tool of claim 2, wherein: the first side of the base has a surface formed with a substantially hexagonal through hole connected to the opening of the base; the sucker has a surface provided with a substantially hexagonal pull lever extended through the through hole of the base into the opening of the base; the pull lever of the sucker is movably mounted in the through hole of the base; a control handle is mounted on the sucker and abuts the base to control movement of the sucker; the control handle is pivotally mounted in the opening of the base and has a first portion formed with a pivot seat pivotally mounted on the pull lever of the sucker and a second portion formed with a handlebar; and the pivot seat of the control handle has a side formed with an eccentrically arranged press block pressing the first side of the base.
5. The blade sharpening tool of claim 3, wherein the base has a substantially L-shaped profile.