Hydropneumatic pressure accumulator
US6527012B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Nov 21, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2201/415
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydropneumatic pressure accumulator, includes a gas chamber, an oil chamber, and a pair of metal bellows separating the chambers. An end plate is displaced according to volume changes in the gas chamber and oil chamber. A valve releases and blocks the flow of hydraulic fluid out of and into the oil chamber and has a valve lifter that controls the valve. During the displacement of the end plate, corresponding to a volume expansion in the gas chamber exceeding a predetermined maximum value, the valve lifter can be displaced by the end plate into a position which blocks the valve. The valve lifter is connected in a fixed manner to the end plate of the metal bellows. The valve can be blocked in two opposing directions by the displacement of the valve lifter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.