Press brake safety device

Details Press brake safety device Press brake safety device

1981-02-25

1983-09-06

Herrmann, Allan D.

192 clutches and power-stop control

Stop mechanism

Safety device

100 53, 192129B, 403 31, F16P 314

Patent

active

044023898

ABSTRACT:
In a mechanical press brake, a photoelectric sensor causes extension of an air cylinder in the linkage between the operating pedal and the clutch lever, thereby disabling the pedal whenever the operator's hand or arm is in dangerous proximity to the machine's ram. The piston of the air cylinder is connected to the pedal through a lost-motion, and the pedal is continuously urged toward its rest position by a spring. The lost-motion and spring prevent repeated extension and retraction of the cylinder from causing dangerous and annoying operation of the pedal during preparation for a forming operation.

REFERENCES:
patent: 1169684 (1916-01-01), Sheff
patent: 4060160 (1977-11-01), Lieber
patent: 4119118 (1978-10-01), Patel
patent: 4131189 (1978-12-01), Stephens
Data Instruments Inc., "Light Curtain of the 80's", Booklet, p. 5, Feb. 1981.

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