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US 9,541,099 B2Granted
Self replenishing accumulator
AssigneeFord Global Technologies, LLC
InventorsLev Pekarsky, Robert O. Burkhart, Mark Davis
Life of this patent
Estimating the term…
Abstract
An accumulator includes a cylinder for containing a working fluid and a first volume of pressurized gas, the gas and fluid being separated by a displaceable piston and a first seal contacting the piston and the cylinder, a reservoir carried on the piston for containing a second volume of pressurized gas, and a device that permits gas flow from the second volume into the first volume.
Claims18
An accumulator comprising:
- a cylinder containing a working fluid and first volume of pressurized gas separated by a displaceable piston, and a first seal between the piston and the cylinder;
- a reservoir carried on the piston containing a second volume of pressurized gas, and a sealed opening between the second volume and working fluid for pressurizing the second volume;
- a device that permits gas flow from the second volume into the first volume.
An accumulator comprising:
- a cylinder containing a working fluid and first volume of pressurized gas separated by a displaceable piston, and a first seal between the piston and the cylinder;
- a reservoir carried on the piston containing a second volume of pressurized gas;
- an upper cell fixed to the piston separating the first and second volumes, having an axially extending hole;
- a device extending through the hole, selectively permitting gas flow therethrough, wherein the device comprises a valve slidable axially relative to the piston to selectively seal and open communication between the first and second volumes.
1 more element
Dependencies are inferred from the claim text.