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US 2012/0070312 A1Published application
Controlled hydraulic systems
AssigneeDavid Brown Hydraulics Limited
InventorPhil Godfrey
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Abstract
There is herein described a controlled hydraulic systems for operating machinery. More particularly, there is described a controlled hydraulic system (200) comprising a variable drive ratio device (214) interposed between a prime mover (210) and a fixed displacement pump (112) for controlling the operating speed of the pump (212) and hence the output flow in the hydraulic system.
Claims19
A controlled hydraulic system comprising:
- a prime mover;
- a pump;
- and
- a variable drive ratio device interposed between the prime mover and the pump;
- wherein the variable drive ratio is capable of controlling the operating speed of the pump and hence the output flow in the hydraulic system.
2 more elements
A method of controlling the operating speed of a pump and hence the output flow in a hydraulic system, the method comprising:
- providing a prime mover;
- providing a pump;
- and
- providing a variable drive ratio device interposed between the prime mover and the pump.
1 more element
19-20. (canceled)
Dependencies are inferred from the claim text.