The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 1995
Filed:
Apr. 23, 1993
David M Williams, Sheffield, GB;
Jess Cawley, Sheffield, GB;
McPherson's Limited, Melbourne, AU;
Abstract
The invention relates to knife blades and their methods of production. Whilst it has long been known that the surface hardness and wear resistant properties of metal objects can be enhanced by a hard surface provided on them, the effective employment of this in relation to knife blades has proved difficult to achieve. The object of the invention is to provide a knife blade with a cutting edge of a harder material than the body of the blade, and the objective is met by a construction comprising a v-shaped cutting edge formed on a blank and such that the cutting tip lies substantially centrally of the width of the blank characterised in that one side face of the v-shaped cutting edge is provided with a coating of a material harder than the material of the blank, the actual cutting edge being formed wholly of the harder material, and the coating having a columnar crystal structure that extends away from the surface of the blank and to the outer face of the coating.