Spool valve assembly
US5979502A · kind A · utility
2Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Oct 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8663
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a conventional spool valve, the nut holding the diaphragm to the spool valve stem is replaced by a retaining ring, thereby simplifying the machining operation and eliminating the problems caused by damaged threads. A good seal is nevertheless achieved by providing an insert molded diaphragm having a bead around its axial aperture, which is compressed against the radial flange of the valve stem, and such that the retaining ring will maintain the compressed condition of the bead against the radial flange to maintain a good seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.