Fail-safe limit switch stopping system for air motor

Details Fail-safe limit switch stopping system for air motor Fail-safe limit switch stopping system for air motor

1975-01-23

1976-03-16

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

60406, 60905, 91461, F15B 2000

Patent

active

039437140

ABSTRACT:
A valving arrangement for a winch motor powered by air or other pneumatic uid. The valving arrangement includes normally closed valves in the working fluid lines which are held open by air in the pilot fluid lines. In the event of a rupture or break in the pilot line, a normally closed valve is allowed to close, thereby stopping the winch and preventing it from overrunning its travel limits.

REFERENCES:
patent: 3301532 (1967-01-01), Lock et al.
patent: 3684244 (1972-08-01), Houck

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