Dual speed fluid control apparatus

Details Dual speed fluid control apparatus Dual speed fluid control apparatus

1978-10-24

1980-05-27

Michalsky, Gerald A.

Fluid handling

Ambient condition change responsive

Underwater

137115, 137599, G05D 1600

Patent

active

042045525

ABSTRACT:
A dual speed fluid control apparatus is provided which includes a valve b having a high pressure passageway and a low pressure passageway extending vertically therethrough in a spaced apart relationship. A top portion of the passageways is interconnected by a top plenum, a middle portion of the passageways is interconnected by a middle plenum, and a bottom portion of the passageways is interconnected by a bottom plenum. The valve body has the following: an ambient pressure inlet into the top plenum, a fluid bypass outlet into the middle plenum, and a pressurized fluid inlet and fluid outlet into the bottom plenum. A valve is located within each passageway and is responsive to pressure in the bottom plenum for bypassing fluid from the bottom plenum to the middle plenum. A spring biased device is located in each passageway and is responsive to the ambient pressure in the top plenum for pushing each valve toward the closed position against the pressure in the bottom plenum. The spring bias on the push device in the high pressure passageway is greater than the spring bias on the push device in the low pressure passageway. A control valve device is provided for selectively opening and closing the bottom portion of the low pressure passage way to the bottom plenum. With this arrangement the fluid control apparatus will supply high pressure fluid when the control valve means is closed and will supply low pressure fluid when the control valve means is open, both of these pressures and flow rates being varied by the magnitude of the ambient pressure in the top plenum.

REFERENCES:
patent: 3327760 (1967-06-01), Crawford

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