Screwdriver handgrip having harder and softer zones

Details Screwdriver handgrip having harder and softer zones Screwdriver handgrip having harder and softer zones

1986-07-07

1988-04-26

Silverberg, Fred

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Handle, handle component, or handle adjunct

Having receptacle within

16DIG12, 811776, 81492, B25G 110

Patent

active

047395362

ABSTRACT:
A handle for tools, specifically for screwdrivers, is disclosed. The handle consists of two materials of different hardness, of which the harder material supporting the tool is incompressible under the forces occurring at operational load, whereas the other material permits slight elastic deformations under forces of load. In order to obtain a hand-sympathetic design which nevertheless transmits high torques, the two gripping zones of softer material are situated adjacent to a gripping zone of harder material located between them.

REFERENCES:
patent: 835149 (1906-11-01), Anderson
patent: 1250508 (1917-12-01), Renkenberger
patent: 1511434 (1924-10-01), Thomson
patent: 2614155 (1952-10-01), Lippy
patent: 2871899 (1959-02-01), Coyle et al.
patent: 3185001 (1965-05-01), Viator
patent: 3302673 (1967-02-01), Forsberg
patent: 3343577 (1964-09-01), Wagner
patent: 3500973 (1970-03-01), Bush
patent: 4452289 (1984-06-01), Smith

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