De-icer

Details De-icer De-icer

1990-01-09

1991-06-11

Peters, Jr., Joseph F.

Aeronautics and astronautics

Aircraft structure

Ice prevention

244134R, B64D 1516, B64D 1500

Patent

active

050226118

ABSTRACT:
A pressure limiter valve for regulating the inflation and deflation of inflatable tubes of a deicer wherein such valve has a housing with a central chamber with inlet and outlet ports communicating therewith. The inlet port is selectively subjected to a vacuum or a fluid pressure. An annular shoulder with a central aperture separates the ports so that a piston moveable within the bore between a first position and a second position can seat on the shoulder and isolate the ports. The one face of the piston has a first and second operative surface wherein the first operative surface communicates at all times to the inlet port via a passageway so that when the force on such first operative surface is slightly greater than a piston biasing force the piston is in a first position which causes the piston to expose both operative surfaces to the fluid pressure from the inlet port. When the inlet port is subjected to a vacuum then the piston moves to a second position and only the first operative surface is in communication with the inlet port while the inlet port remains in communication with the outlet port.

REFERENCES:
patent: 2515519 (1950-07-01), Lawrence et al.
patent: 3263702 (1966-08-01), Pullen et al.
patent: 4733834 (1988-03-01), Phillips, II
patent: 4747575 (1988-05-01), Putt et al.
patent: 4865291 (1989-09-01), Briscoe et al.

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