Metal tools and implements – making – Tool sharpeners – Cutting
Patent
1993-07-02
1995-01-03
Smith, James G.
Metal tools and implements, making
Tool sharpeners
Cutting
451545, B21H 102
Patent
active
053775635
ABSTRACT:
A knife sharpener having a specially configured sharpening groove for sharpening knives or the like to a particularly narrow and sharp edge. The sharpener comprises a body member having a rectangular extension which has a recess for engaging the sharpening blades. The body member has grooves therein for engaging support members, one of which acts as a guard from the knife sharpening activity. A second embodiment includes the supports being angled so as to place the knife sharpener at an angle for easy access thereto. The blades are substantially triangular in shape wherein the corners of each blade are rounded, all having equivalently-sized radii. The blades are detachably attached to the body member within the recess so that the blades can be rotated or flipped for exposing additional and fresh sharpening edges. The recess is shaped so as to secure the blades in an abutting fashion wherein the bottom of each blade is angled from the horizontal and the sharpening groove between the blades is relatively narrow. Because of the rounded edges of the blades, a special sharpening groove is formed wherein the straight edge of each blade forming the groove transforms into an arc which leads to a point. Accordingly, a very narrow and sharp knife edge is formed from this groove arrangement.
REFERENCES:
patent: 455917 (1891-07-01), Blood
patent: 521755 (1894-06-01), Birch
patent: 530613 (1894-12-01), Berkman
patent: 1255760 (1918-02-01), Kirlin
patent: 1622197 (1927-03-01), Keezer et al.
patent: 4731957 (1988-03-01), Weisinger
patent: 5046385 (1991-09-01), Cozzini
Lehrer Norman E.
Smith James G.
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