1975-04-28
1976-05-18
Smith, Al Lawrence
Bridges
81 583, 145 61EA, 145 61L, 145 71, 145 76, B25B 1504
Patent
active
039570967
ABSTRACT:
A hemispherical palm grip is rotatably mounted on one end of a shank. The other end of the shank carries a conventional ball detent adapted to engage a variety of tool heads, such as wrenches, screwdriver bits, chucks, sockets, twist drills and the like. By engaging the palm grip with the palm of one hand while exerting torque on the tool head, as by a ratchet wrench held in the other hand and engaging the shank, the shank is conveniently maintained in proper alignment with the piece being worked on, the shank being rotated by the ratchet handle while the palm grip remains stationary.
When less torque needs to be applied, the ratchet wrench can be dispensed with and the grips alone can be used. While holding the palm grip in the palm of the hand, the thumb and fingers are extended to engage a finger grip translatably mounted on a square in cross section portion of the shank, the finger grip being located adjacent the palm grip. By retracting the thumb and fingers the finger grip is biased toward and into clutching engagement with the palm grip. Torque applied to the palm grip and clutched finger grip is transferred to the square-in-section shank and thence to the tool head and work piece.
REFERENCES:
patent: 994804 (1911-06-01), Wahlstrom
patent: 1049650 (1913-01-01), Benjamin
patent: 1411242 (1922-03-01), Faust
patent: 1878053 (1932-09-01), Winger
patent: 2292228 (1942-08-01), Krieger
patent: 2544736 (1951-03-01), Szekely
patent: 3332304 (1967-07-01), Lynn
patent: 3475999 (1969-11-01), Roberts et al.
patent: 3651718 (1972-03-01), Thomasian
patent: 3797546 (1974-03-01), McGee
Smith Al Lawrence
Zatarga J. T.
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