Hand-held power tool

Details Hand-held power tool Hand-held power tool

1979-08-13

1981-07-07

Reynolds, Wm. Carter

Tool driving or impacting

Impacting devices

Hammer head driven by electric motor

173118, B23B 4502, B25D 1104, B25D 1722

Patent

active

042769418

ABSTRACT:
A hand-held power tool has a tool holder for holding a tool, a striking mechanism including a cylindrical sleeve, a drive piston reciprocable in the sleeve, and a striker actuated by the latter, and a drive motor located axially parallel with and laterally adjacent to the cylindrical sleeve. The drive motor transmits the movement to the striking mechanism through a crank drive which is a one-stage crank drive and has a drive train extending transversely to a longitudinal axis of the cylindrical sleeve. The crank drive includes a rotatable shaft, a bevel gear fixedly mounted on one end portion of the drive shaft and meshing with a drive pinion of the motor, and a crank lever mounted on the other end portion of the drive shaft and connected with the drive piston of the striking mechanism. A fan is mounted on the motor shaft and operative for aspirating air, so that air flows through the motor, then flows around the cylindrical sleeve of the striking mechanism and then discharges toward the tool holder.

REFERENCES:
patent: 3203490 (1965-08-01), McCarty et al.
patent: 3650336 (1972-03-01), Koehler
patent: 3718193 (1973-02-01), Wanner
patent: 3828863 (1974-08-01), Bleicher et al.
patent: 3926266 (1975-12-01), Dorgnon
patent: 4094365 (1978-06-01), Wanner

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