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US 6,101,898 AGranted
Knife and scissors sharpener
AssigneeJokari/US, Inc.
InventorsFred M. Gore, Don H. Saller, Gerald D. Wilhite
Life of this patent
Estimating the term…
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AssigneeJokari/US, Inc.
InventorsFred M. Gore, Don H. Saller, Gerald D. Wilhite
Estimating the term…
A knife and scissors sharpener with a guard for the former. The scissors sharpener has an opening for each blade of the scissors with a cylindrical sharpening stone extending across them. The stone may rotate about an axis perpendicular to the openings to allow its positioning parallel to the cutting edges of the scissors to effectuate the sharpening of the blades. A spring normally keeps the cylindrical stone in one position, but the force exerted on the scissors' handles will cause the stone to move to its proper orientation. The knife sharpener employs two tungsten carbide sharpening elements crossed to form two V's. The sharpening elements in one V have a configuration for effectuating knife sharpening. In the other V, the elements will hone a previously sharpened knife blade. A circular disk holds the crossed sharpening elements in the handle. Rotating the holder 180.degree. permits a change between the sharpener and the honer. A guard attaches to the holder and can rotate between opened and closed positions. In the open position, it permits the use of the sharpener and honer. To use either of these involves holding the edge of the entire mechanism on a surface. In its open configuration, the guard drops down and protects the surface from a knife undergoing sharpening. In its closed position, it rotates up against the holder so that it will occupy minimal additional space.
A device for improving a cutting edge on a knife comprising:
In a device for sharpen ing scissors, said device having (1) a holder with a first opening for one blade of said scissors and a second opening for the other blade, (2) a sharpening cylinder, and (3) an attaching means, coupled to said holder and said cylinder, for retaining said cylinder to said holder in a position extending across said first and second openings in a location for the cutting surface of both of said blades, when inserted in said openings, to contact it, the improvement wherein said attaching means retains said cylinder to said holder in any one of a plurality of configurations relative to said openings, each of configurations differing from the other of said configurations in the angle made by said cylinder relative to the cutting edges of scissors blades placed in said openings, said improvement also including spring means, coupled to said cylinder and to said holder, for urging, under a predetermined tension, said cylinder into one of said configuration, said tension being less than about the average force manually exerted on said scissors when bringing said blades together on said cylinder for sharpening.
In a device for use with a knife compromising working means for affecting the blade of a knife and gripping means, coupled to said working means, for permitting the manual holding of said working means with said device placed on a surface, the improvement comprising guard means, coupled to said gripping means and having first and second configurations, for, in said first configuration, (1) permitting said working means to affect the blade of a knife and (2), with said device placed on a surface, protecting said surface from said blade which said working means affects, and, in said second configuration, lying closer at said device, than in said first configuration.
Dependencies are inferred from the claim text.