Land vehicles: bodies and tops – Bodies – End gates
Patent
1997-05-15
1999-07-13
Pape, Joseph D.
Land vehicles: bodies and tops
Bodies
End gates
2961464, 2961468, B62D 2500
Patent
active
059216042
ABSTRACT:
A hydraulic system for opening and/or closing the rear lift gate of a vehicle uses a double or single acting gas charged hydraulic cylinder. If double acting, a second piston separates the head side of the cylinder into hydraulic and gas chambers. A unidirectional (for the single acting cylinder) or a bidirectional (for the double acting cylinder) drives a pump to operate the cylinder. A solenoid actuated on-off valve selectively communicates the ports of the cylinder with tank pressure. A gas charge accumulator may also be provided. In the double acting embodiment, a two way ball shuttle valve which is vented in the center provides alternating communication between the two cylinder ports.
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Blotz Douglas C.
Griesbach Eric N.
Yu Xudong
Applied Power Inc.
Pape Joseph D.
Patel Kiran B.
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