Hydraulic fluid actuator with metal to metal seals

Details Hydraulic fluid actuator with metal to metal seals Hydraulic fluid actuator with metal to metal seals

1998-07-17

2000-08-08

Suchfield, George

Wells

Valves, closures or changeable restrictors

Fluid operated

166374, 251 58, E21B 3410

Patent

active

060987146

ABSTRACT:
An improved fluid actuator is provided. The fluid actuator (25) comprises a variable volume fluid chamber (124). A first tube (162) is fixed within the variable volume fluid chamber (124). The first tube (162) has a first sealing surface (142) and a second sealing surface (144). A piston (100) is slidably disposed within the variable volume fluid chamber (124) and slidably movable over the first tube (162) between a first position and a second position. The piston (100) comprises a first sealing surface (140) and a second sealing surface (146). The piston first sealing surface (140) and the first tube first sealing surface (142) cooperate to form a seal between the piston (100) and the first tube (162) when the piston (100) is in the first position. The piston second sealing surface (146) and the first tube second sealing surface (144) cooperate to form a seal between the piston (100) and the first tube (162) when the piston (100) is in the second position.

REFERENCES:
patent: 4069871 (1978-01-01), Page, Jr.
patent: 4452310 (1984-06-01), Pringle et al.
patent: 4986357 (1991-01-01), Pringle
patent: 5101904 (1992-04-01), Gilbert
patent: 5318127 (1994-06-01), Hines et al.
patent: 5503913 (1996-04-01), Carmody
International Search Report dated Nov. 11, 1998 from Patent Cooperation Treaty re International Application No. PCT/US98/14855.

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