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US 7,527,074 B1Granted
Hydraulic pressure accumulator
AssigneeThe United States of America as represented by the Administrator of the United States Enviromental Protection Agency
InventorCharles L. Gray, Jr.
Life of this patent
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Abstract
A bladder for a high pressure accumulator includes a metal foil layer adhered to the inside of a rubber bladder with a paint-on adhesive. A position contactor switch is further provided to signal position of the bladder within the accumulator and thereby prevent an undesired shut-off.
Claims2
A hydraulic pressure accumulator, comprising:
- a rigid housing having an open interior;
- a first fixture mounted in said housing for fluid communication with a gas source exterior to said housing;
- a bladder, positioned within the interior of said housing and having an interior in communication with the first fixture and containing a mass of compressed gas;
- a second fixture mounted in said housing for fluid communication between a liquid source exterior to said housing and a space within the housing, said space defined between the housing and the bladder,
- an internal electrically conductive wire located within the bladder;
- and
- an electrically conductive contact element operably connected to the internal wire and protruding from the bladder toward the second fixture and configured to contact a second electrically conductive surface as the volume of liquid within the housing approaches a predetermined low level, thereby creating a circuit from the second electrically conductive surface to the internal wire and signaling the position of the bladder within the accumulator.
4 more elements
Dependencies are inferred from the claim text.