Ball and disc over-speed shut-off mechanism for a rotary pneumat

Details Ball and disc over-speed shut-off mechanism for a rotary pneumat Ball and disc over-speed shut-off mechanism for a rotary pneumat

1986-09-19

1988-03-08

Kazenske, E. R.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

415 25, 418 43, B23Q 506

Patent

active

047294361

ABSTRACT:
A rotary pneumatic tool includes an over-speed shut-off mechanism including a shiftable spring washer and flyweights for imparting a shifting force to the spring washer dependent on the speed of the tool. In the preferred embodiment, the spring washer is shifted by spherical balls restrained by cylindrical walls within a body affixed to the rotor in combination with the spring washer and spring members attached to the body. The spring rates of the spring washer and spring members predetermine the speed at which the over-speed mechanism becomes activated.

REFERENCES:
patent: 3387669 (1968-06-01), Wise, Jr. et al.
patent: 3749530 (1973-07-01), Amador
patent: 4090821 (1978-05-01), Barrows et al.
patent: 4298317 (1981-11-01), Hansson

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