Power-driven hand tool

Details Power-driven hand tool Power-driven hand tool

1981-06-30

1984-06-26

Schmidt, Frederick R.

Tool driving or impacting

Impacting devices

With means to cause or control advance of hammer head

173123, B25D 1110

Patent

active

044560761

ABSTRACT:
A hammer drill has a housing provided with a tool chuck in which a tool is to be mounted. A drive is provided which is capable of rotating and/or axially impacting the tool chuck. This drive includes a piston reciprocable in axial direction of the tool chuck, a drum rotating on a shaft extending parallel to the direction of reciprocation of the piston and provided with a circumferentially extending cam track, and a transmitting arrangement which travels in part in engagement with the cam track and which has another part connected with the piston to reciprocate the same.

REFERENCES:
patent: Re23803 (1954-03-01), Ruben
patent: 1871020 (1932-08-01), Wyzenbeck
patent: 2051053 (1936-08-01), Morris
patent: 2247527 (1941-07-01), Stinnes
patent: 2278696 (1942-04-01), George
patent: 2385439 (1945-09-01), Gubbins
patent: 2498679 (1950-02-01), Hall
patent: 2824455 (1958-02-01), Ristow et al.
patent: 3114421 (1963-12-01), McCloud
patent: 3161242 (1964-12-01), Etzkorn et al.
patent: 3376939 (1968-04-01), Holzapfel
patent: 3399441 (1968-09-01), Imamura
patent: 3828863 (1974-08-01), Bleicher et al.
patent: 4280359 (1981-07-01), Schmid et al.

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