Power plants – Pressure fluid source and motor – Pulsator
Reexamination Certificate
2008-01-29
2008-01-29
Leslie, Michael (Department: 3745)
Power plants
Pressure fluid source and motor
Pulsator
C060S593000, C091S515000
Reexamination Certificate
active
07322190
ABSTRACT:
A hydraulic system maintains squareness while extending an object via two lift cylinder assemblies. A hydraulic circuit is connected to the cylinder assemblies, and includes synchronizer with multiple isolated chambers corresponding to the cylinder assemblies, a rod extending axially through the chambers, and pistons mounted on the rod and associated with the isolated chambers. The hydraulic circuit operably connects a pump to the synchronizer and to the cylinder assemblies for controlling and providing synchronized movement of the cylinder assemblies. The hydraulic circuit includes valving for an automatic re-synchronization cycle, fill cycle, and air purge cycle. The system is effective for moving large objects in a non-binding manner, such as an extendable room on a recreational vehicle, while maintaining accurate squareness.
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JR Automation Technologies LLC
Leslie Michael
Price Heneveld Cooper DeWitt & Litton LLP
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