Safety valve assembly
US4269225A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1978 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Dec 14, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87225
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A safety valve assembly for pressurized medium-operated devices has two valves operating in parallel with one another and each having a working piston and a valve member. The assembly has a housing provided with a supply inlet, a consumer outlet and a discharge outlet. The valve members of the valves are guided in chambers provided in the housing and communicating with one another by passages which crosswise connect the chambers. The valve members in the chambers establish or interrupt communication between the inlet and outlets. When a malfunction occurs, at least one valve member blocks the cross passages so that the consumer outlet does not communicate with the inlet but, instead, is vented through the discharge outlet so that no residual pressure develops in the consumer outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.