Metal tools and implements – making – Tool sharpeners – Cutting
Patent
1998-10-17
2000-11-07
Watts, Douglas D.
Metal tools and implements, making
Tool sharpeners
Cutting
451524, B24D 1508
Patent
active
061420387
ABSTRACT:
A sharpening tool for the sharpening of knives, broadhead arrows and related implements. The sharpener comprises a body with a handle, a handguard, and recesses for detachably mounting rectilinear sharpening elements. The recesses are adapted so that the mounted elements sharpening edges form a "V" shaped cutting angle of a constant degree. This same cutting angle is imparted to a knife edge being sharpened, and accordingly the degree of angle is defined as the optimal blade edge cutting angle. The recesses are further adapted so that the overlapping sharpening elements do not contact each other, preventing the elements from vibrating against each other and thereby extending the useful life of the elements. The point of coincidence of the cutting angle vertex upon the elements occurs substantially spaced from the element edge midpoints, thereby enabling each element edge to provide two distinct sharpening areas when the elements are exchanged and the same element edges are rotated to form the cutting angle. In one embodiment the handguard is adapted to provide planar surfaces for placing the tool upon a table or similar working area while utilizing the tool, and the handguard is further adapted to allow a user to reposition or remove and replace the handguard.
REFERENCES:
patent: 584933 (1897-06-01), Friedrich
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patent: 1622197 (1927-03-01), Keezer
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patent: 4599919 (1986-07-01), Fortenberry
patent: 5291805 (1994-03-01), Byers et al.
patent: 5377563 (1995-01-01), Weeks
patent: 5679068 (1997-10-01), Byers et al.
Kenesky James J.
Kenesky Theodore
Daugherty Patrick J.
Kenesky Theodore
Watts Douglas D.
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