Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate
2008-07-15
2008-07-15
Tsay, Frank S (Department: 3676)
Wells
Valves, closures or changeable restrictors
Fluid operated
C166S068000, C166S264000
Reexamination Certificate
active
07398830
ABSTRACT:
The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a configurable flow path in fluid communication with the first and second chambers, and at least one valve for configuring the flow path in a first state wherein fluid may flow within the flow path only in a direction from the first chamber toward the second chamber, and a second state wherein fluid within the flow path may flow in both directions between the first and second chambers.
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UK Examination Report Under Section 18(3), from application No. GB0617438.7, dated Sep. 3, 2007.
Halvorsen Vidar Sten
Johansen John A.
Williams Michael R.
Advanced Micro Devices , Inc.
Tsay Frank S
Williams Morgan & Amerson P.C.
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