Method for manufacturing a prestressed hydraulic accumulator
US4492013A · kind A · utility
6Cited by
11References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1981 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Feb 20, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/57
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic accumulator comprises two-halfs shells, the diaphragm therebetween defining two cavities. One cavity contains presssurized gas and the cavity receives hydraulic fluid under pressure. The two-half shells are held together by a mechanical element, such as a belt which has been previously prestressed to a tension selected according to the maximum pressure to which the accumulator will be subjected. The use of the prestressed mechanical element changes the dynamic stresses ordinarily found in a hydraulic accumulator to static stresses, thus minimizing the occurrence of creeks and failure of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.