Impact driver for electric drill

Details Impact driver for electric drill Impact driver for electric drill

1976-06-04

1978-07-04

Hafer, Robert A.

Tool driving or impacting

Impacting devices

With anvil arranged to transmit torsional impact to tool

B25D 1500

Patent

active

040983544

ABSTRACT:
A rotary impact driver for converting continuous rotation to rotary impact forces, particularly suitable as an attachment for an electric drill. A hammer is supported upon the uniformly rotating input shaft by a plurality of flexible resilient elements capable of twisting about the shaft axis causing axial translation of the hammer when hammer rotation is momentarily restrained due to engagement with an anvil mounted upon an impact producing output shaft.

REFERENCES:
patent: 1832123 (1931-11-01), Holland
patent: 2061843 (1936-11-01), Meunier
patent: 2143173 (1939-01-01), Shaff
patent: 2158303 (1939-05-01), Pott
patent: 2476632 (1949-07-01), Shaff
patent: 2576851 (1951-11-01), Newman
patent: 2712254 (1955-07-01), Schodeberg
patent: 3106274 (1963-10-01), Madsen
patent: 3526282 (1970-09-01), Newman

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