Poppet valve control with sealing element providing improved loa

Details Poppet valve control with sealing element providing improved loa Poppet valve control with sealing element providing improved loa

1998-12-18

2000-07-18

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 3002, 251 35, 251 44, F16K 3134, F16K 31383, F16K 3140

Patent

active

060895284

ABSTRACT:
A control for a poppet valve providing improved load drift control is disclosed. The control includes a valve member operably moveable between a closed position and a range of open positions for allowing flow from an associated poppet control chamber, and a sealing element disposed between a first cavity portion in communication with the control chamber and a second cavity portion for preventing leakage around the valve member therebetween. The sealing element is supported by structure which maintains the sealing element in close alignment with a bore in which the valve member is supported, the sealing element in several embodiments being integrally formed with the bore and in other embodiments being self aligning with the bore.

REFERENCES:
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patent: 4535809 (1985-08-01), Andersson
patent: 4593715 (1986-06-01), Stich et al.
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patent: 5253672 (1993-10-01), Uehara et al.
patent: 5255705 (1993-10-01), Uehara et al.
patent: 5421545 (1995-06-01), Schexnayder
patent: 5645263 (1997-07-01), Aardema

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