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US 6,029,559 AGranted
Telescoping system with multiple single-stage telescopic cylinders
AssigneeGrove U.S. L.L.C.
InventorsHenry D. Barthalow, Claude R. Zimmerman
Life of this patent
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Abstract
The telescoping system includes a first fluid motor and a second fluid motor. The first fluid motor includes a first extension chamber and a first retraction chamber, and the second fluid motor includes a second extension chamber and a second retraction chamber. A hydraulic control system in the telescoping system controls the supply of hydraulic fluid to the first fluid motor and between the first fluid motor and the second fluid motor such that the first and second fluid motors operate independently.
Claims14
A telescoping system, comprising:
- a first tele cylinder including a first cylinder, a first rod having a first and second end, a first piston head connected to said first end of said first rod and disposed in said first cylinder, said second end of said first rod including first, second and third ports;
- said first rod, said first piston head and said first cylinder defining a first chamber;
- said first cylinder and said first piston head defining a second chamber;
- said first rod and said first piston head including a first passageway communicating said first port and said first chamber and a second passageway communicating said third port and said second chamber;
- said first cylinder and said first rod including a third passageway communicating with said second port;
- said first cylinder including a fourth passageway communicating with said first chamber;
- a second tele cylinder, structurally separate from said first tele cylinder, including a second cylinder, a second rod having a third and fourth end, a second piston head connected to said third end of said second rod and disposed in said second cylinder, said fourth end of said second rod including a fourth and fifth port;
- a first line connecting said fourth port and said third passageway;
- a second line connecting said fifth port and said fourth passageway;
- said second rod, said second piston head and said second cylinder defining a third chamber;
- said second cylinder and said second piston head defining a fourth chamber;
- said second rod including a fifth passageway communicating said third chamber and said fifth port;
- and
- said second rod and said second piston head including a sixth passageway communicating said fourth port and said fourth chamber.
11 more elements
A telescoping system, comprising:
- a first fluid motor having a first extension chamber and a first retraction chamber;
- a second fluid motor, structurally separate from said first fluid motor, having a second extension chamber and a second retraction chamber;
- means for providing fluid communication between said first fluid motor and said second fluid motor;
- and wherein
- said first fluid motor includes a first extension supply port in fluid communication with said first extension chamber, a second extension port in fluid communication with said second extension chamber via said providing means, and a retraction supply port in fluid communication with said first retraction chamber and in fluid communication with said second retraction chamber via said providing means.
2 more elements
A telescoping system, comprising:
- a first fluid motor having a first extension chamber and a first retraction chamber;
- a second fluid motor, structurally separate from said first fluid motor, having a second extension chamber and a second retraction chamber;
- a hydraulic fluid supply system controlling supply of hydraulic fluid to said first fluid motor and between said first fluid motor and said second fluid motor such that said first and second fluid motors operate independently.
Dependencies are inferred from the claim text.