Air over oil high pressure modulating valve

Details Air over oil high pressure modulating valve Air over oil high pressure modulating valve

1976-11-05

1978-10-03

Schwadron, Martin P.

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

13759618, F16K 1114, F15B 042

Patent

active

041178653

ABSTRACT:
An air over oil high pressure modulating valve comprising dual acting valve members wherein one of said valves is responsive to air pressure acting thereon for opening the other of said valves for directing controlled hydraulic fluid pressure to a brake apparatus, or the like. Upon the application of pneumatic pressure against the first valve member, the second valve member is opened for releasing hydraulic fluid pressure to the brake apparatus for actuation thereof. Upon the release of pneumatic pressure from the first valve member, the second valve member is maintained in a closed position for retaining the hydraulic fluid in a fluid chamber which is in communication with a fluid accumulator. When the pneumatic pressure acting on the first valve is only partially released, the first valve opens communication between the open second valve and the fluid accumulator for reducing the fluid pressure at the brake apparatus.

REFERENCES:
patent: 3107693 (1963-10-01), Puster et al.
patent: 3977425 (1976-08-01), Hayashida

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