Asymmetric volume booster arrangement for valve actuator

Details Asymmetric volume booster arrangement for valve actuator Asymmetric volume booster arrangement for valve actuator

2005-04-15

2008-12-02

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

For double-acting motor

C091S274000

Reexamination Certificate

active

07458310

ABSTRACT:
An asymmetric volume booster assembly includes an actuator movable in a first direction and a second direction, a first booster in fluid communication with the actuator, and a second booster in fluid communication with the actuator. The first booster includes a first supply passage and a first exhaust passage, wherein the first supply passage supplies fluid to the actuator and the first exhaust passage exhausts fluid from the actuator. The first exhaust passage is configured to produce a first fluid flow resistance. The second booster includes a second supply passage and a second exhaust passage, wherein the second supply passage supplies fluid to the actuator and the second exhaust passage exhausts fluid from the actuator. The second exhaust passage is configured to produce a second resistance to fluid flow. The first fluid flow resistance is greater than the second fluid flow resistance, such that the actuator moves substantially symmetrically in the first direction and the second direction.

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Jack L. Johnson, P.E., “Matching valve and cylinder asymmetry” Hydraulics and Pneumatics, Sep. 2003.
Instruction Manual, Form 5122, Aug. 2003, Type 2625 and 2625NS Volume Boosters.
The International Search Report and The Written Opinion of the International Searching Authority (PCT Rule 44.1) in International Application No. PCT/US2005/012646, dated Aug. 4, 2005.
Jack L. Johnson, P.E., “The Final Word on Non-symmetrical Valves,” Hydraulics and Pneumatics, Oct. 2003.
Rudolph Muijtjens, “Praktisches Positionieren mit pneumatischen Linearantrieben,” Ölhydraulik und Pneumatik, vol. 42, No. 7., Mainz, DE (1998).
English Translation of Muijtjens: Rudolph Muijtjens, “Practical Positioning with Pneumatic Linear Drives,” 3031 Oil Hydraulics and Pneumatics, vol. 42, No. 7., Mainz, DE (1998).

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