Expansible chamber device having variably restrained valve syste

Details Expansible chamber device having variably restrained valve syste Expansible chamber device having variably restrained valve syste

1990-10-11

1992-07-14

Hepperle, Stephen M.

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

137517, 137522, 13761421, 137513, 91471, F16K 1730

Patent

active

051294141

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, an expansible chamber device includes a piston movable within a cylinder, a head on the cylinder having intake and exhaust ports, a normally-open intake valve for closing the intake port automatically when the flow rate or velocity of a working medium entering the cylinder reaches a predetermined value, variable restraining means for inhibiting closing of the intake valve in response to flow, an exhaust valve for preventing escape of working medium from the cylinder until cylinder pressure is reduced to a set level, spring means for opening the exhaust valve at that level, and means operable near the top-dead-center position of the piston for automatically opening the intake valve and for closing the exhaust valve to enable the cycle to repeat. A unique system for controlling the variable restraining means, as well as methods for regulating the flow or working medium through said valves, also is disclosed.

REFERENCES:
patent: 694547 (1902-03-01), Hood
patent: 1527678 (1925-02-01), Farguhar
patent: 3274094 (1966-09-01), Klein
patent: 3587601 (1971-06-01), Shippy
patent: 4128105 (1978-12-01), Follett
patent: 4131235 (1978-12-01), Lieding
patent: 4630799 (1986-12-01), Nolan et al.

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