Title: Fail-safe limit switch stopping system for air motor

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.

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Other info:

Inventors: Reinker, Ralph W. (San Jose, CA, US)

Application Number: 543612
Filing Date: 1975-01-23
Publication_date: 1976-03-16
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 60/403 60/406, 60/905, 91/461
Other Classes:
US Patent Ref:

3301532	Jan, 1967	Lock et al.	254/173.
3684244	Aug, 1972	Houck	254/173.

Other Refs:
Primary Examiner: Geoghegan, Edgar W.
Assistant Examiner:
Attorney: Sciascia; R. S., Hodges; Q. E.