Spring-biased valve assembly for a gear pump
US5346174A · kind A · utility
5Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1994 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Jan 24, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23K5/147
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A gear pump includes a valve member adapted to engage a valve seat and close a control port and urged to an open position by a coil spring. In order to reduce cocking of the valve member relative to the valve seat when the valve member is closed, the end coil of the spring that engages the valve member is formed so as to be in non-parallel relation with the sealing surface of the valve seat when the spring is relaxed. As the spring is compressed during closure of the valve member, the end coil moves into parallelism with the sealing surface in order to enable the valve member to squarely engage the sealing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.