1978-06-29
1980-02-26
Holko, Thomas J.
81121R, 85 32R, 85 45, F16B 2300
Patent
active
041899768
ABSTRACT:
A fastener element adapted for use as a bolt head, nut and the like. The element includes an operative structure adapted for removable interconnection with at least one other element of a fastener assembly to complete the assembly. A head extends from the operative structure and has an exterior surface adapted to be removably engaged by a wrench for rotation of the element. The head is hexagonal in configuration and has a projection extending from each side of the head a predetermined height less than the height of the head and being circumferentially aligned to thereby cooperate with the edges of each adjoining pair of sides of the head to form a twelve point head portion at the location of the projections while retaining a six point head portion at the remainder of the head. Thus, the fastener element can be used with either a six point or a twelve point wrench.
REFERENCES:
patent: 411000 (1889-09-01), Anderson
patent: 838109 (1906-12-01), Hanes et al.
patent: 2210742 (1940-08-01), Whitney
patent: 3140636 (1964-07-01), Grimm
patent: 3413017 (1968-11-01), Hughey
patent: 3456549 (1969-07-01), Horton
patent: 3561317 (1971-02-01), Rowell
patent: 3618444 (1971-11-01), Kay et al.
patent: 3812757 (1974-05-01), Reiland
patent: 3897712 (1975-08-01), Black
Fargo Manufacturing Company, Inc.
Holko Thomas J.
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