Pressure relief valve
US6622752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2001 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | May 25, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7928
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention provides a pressure relief valve, which achieves a reliable sealed structure in a valve holder 31 without the valve holder 31 jutting far out from a common rail, assures stability of operation of a valve spring 11 in a valve holder 31, and is capable of being manufactured at low cost and can be made compact. A first invention relates to a pressure relief valve, which focuses on making the low-pressure portion side end portion of a valve holder 31 a closed structure, and which has a valve spring 11 that is housed inside the valve holder 31; spring seats 34, 35 on which a valve spring 11 is seated; a valve seat 32 that is mounted to the valve holder 31; and a valve body 9, which is lifted from the valve seat 32 by fluid pressure, this pressure relief valve being characterized in that there is formed a closed end portion 36, which makes the low-pressure portion side end portion 31B of the valve holder 31 a closed state, and, in addition, is constituted so as to enable a valve spring 11 to be seated between the inner wall surface of closed end portion 36 and a spring seat 34, 35. A second invention focuses on making the spring seats 34, 35 of valve spring 11 a cup…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.