Movable barrier apparatus

Details Movable barrier apparatus Movable barrier apparatus

1981-06-22

1984-12-18

Dorner, Kenneth J.

192 clutches and power-stop control

Stop mechanism

Safety device

74615, F16P 304

Patent

active

044886306

ABSTRACT:
A movable barrier apparatus for a power press and the like and having a fluid circuit for controlling operation of a machine tripping device responsive to a predetermined sequence of rotary cam mechanism movements for positively locking the barrier in an operative position precluding operator access to the machine work area, the rotary cam mechanism cooperating with the circuit to render machine tripping valve means of the fluid circuit inoperative when the barrier is in a position other than its operative position.

REFERENCES:
patent: 2566243 (1951-08-01), Nyquist
patent: 2683515 (1954-07-01), Horn et al.
patent: 4033250 (1977-07-01), Pinkstaff
patent: 4036343 (1977-07-01), McPhee
patent: 4279335 (1981-07-01), Plumb

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