GB2441311A

GB2441311A - Knife sharpener

Info

Publication number: GB2441311A
Application number: GB0617022A
Authority: GB
Inventors: Wen-Chiu Wu
Original assignee: SHENG CHING ENTPR CO Ltd
Current assignee: SHENG CHING ENTPR CO Ltd
Priority date: 2006-08-30
Filing date: 2006-08-30
Publication date: 2008-03-05
Anticipated expiration: 2026-08-30
Also published as: GB2441311B; GB0617022D0

Abstract

A knife sharpener has a housing 10, a base 21 and an adjustable sharpening device 30 movably mounted on the base 21 and received inside the housing 10. The sharpening device 30 comprises two sharpening rods 32, each mounted on an inclined arm 31 on a respective seat 311 which can be moved along grooves 214 in the base 21. The position of the sharpening rods 32 is adjusted by means of a threaded rod 41 which passes through a threaded hole 313 in each of the seats 311.

Description

I 2441311

KNIFE SRARPENER

1. Field of the Invention

The present invention relates to a knife sharpener, and more particularly to an adjustable knife sharpener that is adjustable and is convenient in use.

2. Description of Related Art

Knives are common tools in the kitchen. When a knife is dull, people often need a sharpener for sharpening the knife. There are various types of the conventional knife sharpeners, including electric knife sharpeners and steel knife sharpeners.

However, the conventional knife sharpeners do not provide a function of adjusting, so knives may be sharpened at the same position on the conventional knife sharpener.

Therefore, the life span of the conventional knife sharpeners is reduced caused by sharpening a knife at the same site.

To overcome the shortcomings, the present invention tends to provide a knife sharpener to mitigate the aforementioned problems.

The primary objective of the present invention is to provide a knife sharpener that is adjustable and is convenient in use.

A knife sharpener comprises a housing, a base, a sharpening device and an adjustable device. The housing has a case having a proximal end, a top and an outer surface, a cavity defined in the case, and a slot defined in the top of the case and communicating with the cavity. The base is mounted on the housing and having a base board being rectangle. The base board has two ends, two side edges, two side walls respectively formed on the side edges of the base board, each side wall having an inir surface, a center, and an operating hole defined through the base board near the ceiter.

The sharpening device is movable mounted on the base, received inside the housin and has two sharpening arms mounted on the base and two sharpening rods. Each sharpening arm has a seat and an arm. The seat is received inside the base and has a threaded hole defmed through the seat. The arm is mounted on and inclinedly extending from the seat and has an outer surface, a top end, a bottom end, and a holding recess defined in the outer surface of the arm. The two sharpening rods are respectively received inside the holding recesses in the arms. The adjusting device is mounted on the sharpening device between the two arms of the sharpening device and has a threaded rod and an adjustable wheel. The threaded rod has two ends, and the two ends of the threaded rod are respectively mounted through the seats of the sharpening device, and an adjusting wheel is mounted on the threaded rod and partially extending out the operating hole in the base.

Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

IN THE DRAWINGS

Fig. 1 is a perspective view of a knife sharpener in accordance with the present invention; Fig. 2 is a partially exploded perspective view of the knife sharpener in Fig. I; Fig. 3 is another partially exploded perspective view of the knife sharpener in Fig. 1; Fig. 4 is a side plan view in partial section of the knife sharpener in Fig. 1; Fig. 5 is an operational side view in partial section of the knife sharpener in Fig. 1; and Fig. 6 is an operational side plan view in partial section of the knife sharpener * 3 in Fig. 1.

To solve the shortcomings of the conventional knife sharpener, the present invention intends to provide a knife sharpener that is adjustable and is convenient in use. With reference to Figs. 1 to 3, the knife sharpener of the present invention has a housing (10), a base (21) mounted on the housing (10), a sharpening device (30) mounted inside the housing (10) and an adjustable device (40) mounted on the sharpening device (30).

With further reference to Fig. 4, the housing (10) has a case (11), a handle (12), a cavity (13) and a slot (14). The case (11) has a proximal end, atop and an outer surface. The handle (12) has an outer surface and a pattern (121). The handle (12) is longitudinally formed on the proximal end of the case (11), and the pattern (121) is defmed in the outer surface of the handle (12). The cavity (13) is defined in the case (11). The slot (14) is defmed in the top of the case (11) and communicates with the cavity (13).

The base (21) is mounted on the case (11) and has a base board (211), two wings (212) and two side walls (213). In a preferred embodiment, the base board (211) is a rectangle board and has two ends, two side edges, a center and an operating hole (216). The two wings (212) are respectively formed on the two ends and has two through holes (215) and two bolts. The two through holes (215) are respectively defined in the wings (213). The two bolts are respectively mounted through the through holes (215) for combining the base (21) with the case (11). The two side walls (213) are respectively formed on the side edges of the base board (211). Each side wall (213) has a top, an inner surface and a transverse slot (214). The transverse slot (214) is defined in the inner surface of the side wall (213) near the top. The transverse slots (214) defmed in the two side walls (213) are faced to each other. The operating hole (216) is defined through the base board (211) near the center. In a preferred embodiment, the operating hole (216) is a rectangle mounted hole.

The sharpening device (30) is movable mounted on the base (21) and received inside the housing (10). The sharpening device (30) has two sharpening arms (31), two sharpening rods (32) and two bolts (33). The two sharpening arms (31) are mounted on the base (21). Each sharpening arm (31) has a seat (311) and an arm (312). The seat (311) is held inside the base (21) and has a threaded hole (313) defined through the seat (311). The arms (312) mounted on the sharpening arms (31) are cross-mounted and the cross-position always faces to the slot (14) defmed in the housing (10). The arm (312) is mounted on and inclinedly extends from the seat (311) and has an outer surface, a top end, a bottom end, a transverse rib (314), a holding recess (315), a threaded hole (316) and a receiving hole (317). The transverse rib (314) is formed on the outer surface of the aim (312) and is received inside the transverse slot (214) in the base (21) to make the arm (312) sliding relative to the base (21) along the transverse slot (214). The holding recess (315) is defmed in the outer surface of the arm (312).

The holding recesses (315) defined in the two arms (312) are faced to each other. The threaded hole (316) is defined in the top end of the arm (312). The receiving hole (317) is defmed in the bottom end of the mounting arm (312). The sharpening rods (32) are respectively received inside the holding recesses (315) in the arms (312). Each sharpening rod (32) has two ends. One end of the sharpening rod (32) is mounted inside the receiving hole (317) in the arm (312), and the other end of the sharpening rod (32) is mounted inside the threaded hole (316) in the arm (312). The two bolts (33) are respectively screwed into the threaded holes (316) defined in the two arms (312).

Each bolt (33) has a bottom and a recess (331) defined in the bottom. The recess (331) holds one end of the sharpening rod (32) inside.

The adjusting device (40) is mounted between the seats (311) of the two sharpening arms (31) of the sharpening device (30) and has a threaded rod (41) and an adjusting wheel (42). The threaded rod (41) has two ends. The two ends of the threaded rod (41) are respectively screwed through the threaded holes (313) in the seats (311) of the two sharpening arms (31). The adjusting wheel (42) is mounted on the threaded rod (41) and partially extends out the operating hole (216) in the base (21).

With reference to Figs. S and 6, when the knife sharpener in accordance with the present invention is in use, the adjusting wheel (42) may be rotated to drive the threaded rod (41) to rotate. With the engagements between the transverse ribs (314) on the sharpening arms (31) and the transverse slots (214), the sharpening arms (31) will be moved along the threaded rod (41) when the threaded rod (41) is rotated. Therefore, positions of the sharpening arms (31) is adjusted. When a knife (50) is sharpened with the knife sharpener in accordance with the present invention, a user may optionally adjust the sharpening site of the knife sharpener for prolong the life span of the knife sharpener.

The knife sharpener in accordance with the present invention has the following advantages.

The mounting arms (31) of the knife sharpener may be adjusted simply by rotating the adjustable wheel (42), therefore, the sharpening site of the mounting arms (31) may be changed and the knife sharpener is easy to operate. Furthermore, the life span of the knife sharpener may be prolonged. * 6

Claims

CLAIMS: 1. A knife sharpener comprising: a housing (10) having a case

(11) having a proximal end, a top and an outer surface, a cavity (13) defined in the case, and a slot (14) defined in the top of the case (11) and communicating with the cavity( 13), a base (21) mounted on the housing (10) and having a base board (211) being rectangle and having two ends, two side edges, two side walls (213) respectively formed on the side edges of the base board (211), each side wall having an inner surface, a center, and an operating hole (216) defined through the base board (211) near the center, a sharpening device (30) movable mounted on the base (21), received inside the housing (11) and having two sharpening arms (31) mounted on the base (21), each sharpening arm (31) having a seat (311) received inside the base and having a threaded hole defmed through the seat (311), and an arm (312) mounted on and inclinedly extending from the seat (311) and having an outer surface, a top end, a bottom end, and a holding recess (315) defined in the outer surface of the arm (312), and two sharpening rods (32) respectively received inside the holding recesses (315) in the arms (312), an adjusting device (40) mounted on the sharpening device (30) between the two arms (312) of the sharpening device (30) and having a threaded rod (41) having two ends, the two ends of the threaded rod (41) respectively mounted through the seats (311) of the sharpening device (30), and an adjusting wheel (42) mounted on the threaded rod (41) and partially extending out the operating hole (216) in the base (21).

2. The knife sharpener as claimed in claim 1, wherein the base (21) further comprises two wings (212) respectively formed on the two ends of the base board (211) and having two through holes respectively defmed in the wings, and two bolts respectively mounted through the through holes to combine the base (21) with the case (11).

3. The knife sharpener as claimed in claim I or 2, wherein each side wall of the base (21) further comprises a transverse slot (214) defmed in the inner surface of the side wall near the top, wherein the transverse slots (214) defined in the side walls are faced to each other, and the arm (312) of each sharpening arm (31) of the sharpening device (30) further comprises a transverse rib (314) formed on the outer surface of the arm (312) and received inside one of the transverse slots (214) in the base (21).

4. The knife sharpener as claimed in claim 3, wherein the arm (312) of each sharpening arm (31) of the sharpening device (30) further comprises a threaded hole (316) defined in the top end of the arm (312), and a receiving hole (317) defined in the bottom end of the arm (312) for holding one end of a corresponding sharpening rod (32), and the sharpening device (30) further comprises two bolts respectively screwed into the threaded holes defined in the two arms (312), each bolt having a bottom and a recess defined in the bottom for holding one end of the sharpening rod (32).

5. The knife sharpener as claimed in claim 4, wherein the housing further comprises a handle (12) longitudinally formed on the proximal end of the case (11) and having an outer surface and a pattern (121) formed on the outer surface of the handle (12).