Power tool

Details Power tool Power tool

1991-05-21

1996-05-07

Smith, Scott A.

Tool driving or impacting

Impacting devices

Hammer head driven by relatively moving motion transmitting...

173216, 173217, 173170, 302721, B25D 1502

Patent

active

055137091

ABSTRACT:
The invention provides a portable power tool which is lightweight and convenient to use by the general public in any of its various forms, as a wallpaper stripper, a paint scraper or a cold chisel up to a power spade. The tool comprises a housing (12), a drive, an electric motor (14,160) adapted to drive at least one selected tool bit (4,56,62,64,66,68) mounted on an output shaft (44) moving in a reciprocating axial manner. Conveniently the drive may be a linear motor (160) or if used with a cam device, a rotary motor (14). The cam device may be a cylinder cam (32) provided with a sinusoidal cam track (34).

REFERENCES:
patent: 1505493 (1924-08-01), Roberts
patent: 2051053 (1936-08-01), Morris
patent: 3449967 (1969-06-01), Dancsik
patent: 3789933 (1974-02-01), Iarecki
patent: 3832776 (1974-09-01), Sawyer
patent: 4073348 (1978-02-01), Schramm et al.
patent: 4289210 (1981-09-01), Schoeffler
patent: 4601351 (1986-07-01), Hartyuig et al.
patent: 4930583 (1990-06-01), Fushiya et al.

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