Knife Sharpener

Abstract

A knife sharpener comprises a base, a motor, a grinding wheel assembly, a rotary shaft and two springs. The working channel between the edge of the grinding disc and the grinding awl is automatically adjustable to accommodate different blade of different thickness. When the knife sharpener performs grinding operation, the grinding wheel assembly can simultaneously grind both cutting sides of the knife. In addition, the knife can be clamped firmly through the three contacting areas of the grinding disc, the grinding awl, and the cutting edge, so that the operation of knife grinding can be successfully performed.

Description

[0001]This application is a continuation of part of U.S. patent application Ser. No. 11 / 626,844, which claims the benefit of the earlier filing date of Jan. 24, 2007. Claim 1 of this application is revised from the claim 1 of the U.S. patent application Ser. No. 11 / 626,844, claims 2, 3, 4 and 5 of this application correspond to claims 2, 3, 4 and 5, of the U.S. patent application Ser. No. 11 / 626,844, respectively.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a knife sharpener, and more particularly to a knife sharpener, wherein a high-speed running grinding wheel assembly is driven by motor power to perform grinding operation.[0004]2. Description of the Prior Art[0005]There are various types of knife sharpeners, which mainly include manual knife sharpener and power driven knife sharpener. What is to be discussed in the present invention is a power driven grinding wheel assembly for grinding knife. Referring to FIG. 1, a conventional...

AI Technical Summary

Benefits of technology

[0009]The primary objective of the present invention is to provide a knife sharpener, particularly to a knife sharpener, wherein a high-speed running grinding wheel assembly is driven by motor power to perform grinding operation. The grinding surface of an annular-shaped grinding disc contacts one side of the cutting edge of a knife at two contacting areas to perform grinding operation, meanwhile, the tapered grinding surface of a grinding awl contacts the other side of the cutting edge of the knife at one contacting area to perform grinding operation. By such a manner, the grinding disc and the grinding awl can prevent the knife from excessively shaking and improve the stability of the operation.

[0010]The secondary objective is to provide a knife sharpener, when the knife is placed in the working channel between the edge of the grinding disc and the grinding awl, the cutting edge can push the grinding disc slightly outward to enlarge the space between the grinding disc and the grinding awl, a thin cutting edge makes a narrow space, and a thick cutting edge makes a wide space. In addition, the awl of the tapered grinding surface of the grinding awl can keep the cutting edge from overly moving downwards. In other words, the space of the working channel can cooperate with the awl of the tapered grinding surface to deal with cutting edge with different thickness, so that when cutting edge of knives with different thickness is to be ground, it can properly contact the grinding disc and the grinding awl.

Problems solved by technology

When using the conventional knife sharpener to perform grinding operation, the grinding wheel cannot simultaneously grind the both sides of a knife.

Images