Power plants – Pressure fluid source and motor – Apparatus having means responsive to or ameliorating the...
Reexamination Certificate
2007-11-20
2007-11-20
Lazo, Thomas E. (Department: 3745)
Power plants
Pressure fluid source and motor
Apparatus having means responsive to or ameliorating the...
C091S463000
Reexamination Certificate
active
11363323
ABSTRACT:
A controlled piston (20, 62, 102) having a first end (24, 64, 104) mounted in a controlled piston sleeve (22) and a spool (16) movably mounted in a spool sleeve (18), a first fluid passage (40, 66, 108) from the spool (16) to the controlled piston first end (24, 64, 104), the position of the spool (16) affecting a position of the controlled piston (20, 62, 102), an FFV (42, 68, 110) in an FFV sleeve (44, 70, 112) in the first fluid passage (40, 66, 108) having a first end section (46, 74, 116), a second end section (48, 78, 120) and a central section (50, 82, 126) having a third diameter less than the diameters of the first and second sections, the FFV (42, 68, 110) being shiftable between a first position blocking the first fluid passage (40, 66, 108) and a second position allowing fluid flow past the central section (50, 82, 126) to the controlled piston (20, 62, 102), and a second fluid passage (56, 88, 134) from the spool (16) to the FFV first end section (46, 74, 116). Shifting the spool (16) to a failsafe position shifts the FFV (42, 68, 110) to the first position to fix the controlled piston (20, 62, 102) in place.
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Futa, Jr. Paul W.
Lafferty Gregory A.
Lewis Steven A.
Van Oosterum John C.
Wieger George S.
Honeywell International , Inc.
Ingrassia Fisher & Lorenz
Lazo Thomas E.
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