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US 7,581,486 B2Granted
Hydraulic system
AssigneeEurocopter Deutschland GmbH
InventorWolfram Grieser
Life of this patent
Estimating the term…
Abstract
A hydraulic system includes a reservoir for a hydraulic fluid, a pump, a high-pressure line network, a low-pressure line network and operating cylinders each of which can be connected to the high-pressure line network or to the low-pressure line network via control units, each operating cylinder is associated with a local compensation volume element.
Claims14
A hydraulic system comprising:
- a reservoir for a hydraulic fluid;
- a pump;
- a high-pressure line network;
- a low-pressure line network;
- a first operating cylinder having a first operating piston and connectable to the high-pressure line network and the low-pressure line network via a first control unit;
- a second operating cylinder having a second operating piston and connectable to the high-pressure line network and the low-pressure line network via a second control unit;
- at least one local compensation volume element associated with a respective one of the first and second operating cylinders, the local compensation volume element adapted to compensate for a differential volume between a high-pressure side and a low pressure side of the respective first or second operating cylinder, and having a compensation space and a compensation operating piston disposed movably in the compensation space;
- and
- a mechanical connection coupled to the compensation operating piston and couplable to the respective one of the first and second operating pistons and configured to actuate the compensation volume element for accommodating and releasing the differential volume.
6 more elements
A hydraulic system comprising:
- a reservoir for a hydraulic fluid;
- a pump;
- a high-pressure line network;
- a low-pressure line network;
- a first operating cylinder having a first operating piston and connectable to the high-pressure line network and the low-pressure line network via a first control unit;
- a second operating cylinder having a second operating piston and connectable to the high-pressure line network and the low-pressure line network via a second control unit;
- a pressure accumulator having an accumulator operating piston and a useful piston displacement greater than a piston displacement of the second operating cylinder
- a shared local compensation volume element associated with the second operating cylinder and adapted to accommodate differential volumes between a high-pressure side and a low pressure side of the second operating cylinder and of the pressure accumulator, the compensation volume element having a compensation space and a compensation operating piston disposed movably in the compensation space;
- and
- a mechanical connection coupled to the compensation operating piston, couplable to the accumulator operating piston and configured to actuate the compensation volume element for accommodating and releasing the differential volume.
7 more elements
Dependencies are inferred from the claim text.