Power hand tool, especially impact screwdriver

Details Power hand tool, especially impact screwdriver Power hand tool, especially impact screwdriver

1996-03-13

1998-01-13

Smith, Scott A.

Tool driving or impacting

Impacting devices

With anvil arranged to transmit torsional impact to tool

173211, 173216, B25B 1900

Patent

active

057069026

ABSTRACT:
In a power hand tool, especially a screwdriver, with a motor, a planet gear and a rotary impulse generator, a spring mechanism is provided to damp vibrations of the housing caused by the rotary impulse generator. To improve the damping with a simple design, one end of a compression spring is supported on a ring, which in turn is guided at a coil which is parallel to the axis, on the one hand, and is guided displaceably in parallel to the axis between a part rigidly connected to the housing and a part exposed to the rotary impact, on the other hand. The other end of the compression spring is supported on a part rigidly connected to the housing.

REFERENCES:
patent: 2343596 (1944-03-01), Van Sittert et al.
patent: 2662434 (1953-12-01), Burkhardt
patent: 2907239 (1959-10-01), Schwenk

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