Dual speed transmission for automatic assembly machine

Details Dual speed transmission for automatic assembly machine Dual speed transmission for automatic assembly machine

1988-08-31

1989-11-28

Yost, Frank T.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81467, 81473, 192 56R, B23Q 504

Patent

active

048831301

ABSTRACT:
The fastener driving tool of an automatic assembly machine is rotated by a two speed transmission which acts in conjunction with two torque-responsive clutches. Initially, the transmission rotates the driving tool at a high speed to effect fast driving of the fastener. After torque of predetermined magnitude has been applied to the fastener, one of the clutches torques out and, at that time, the transmission rotates the driving tool at a greatly reduced speed by way of the other clutch so that the fastener is rotated slowly during final tightening. When final tightening torque of predetermined magnitude is applied to the fastener, the second clutch torques out to stop rotation of the driving tool.

REFERENCES:
patent: 2973848 (1961-03-01), Dixon
patent: 2989996 (1961-06-01), Dixon
patent: 3696871 (1972-10-01), Stenbacka
patent: 3845673 (1974-11-01), Karden et al.
patent: 4328871 (1982-05-01), Gluskin
patent: 4513827 (1985-04-01), Dubiel
patent: 4650007 (1987-03-01), Fujita et al.

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