Adjustment assembly for valve spool and associated centering spring
US4777980A · kind A · utility
5Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jun 1, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8671
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An adjustment assembly for axially positioning the spool and associated centering spring within the bore of a valve body includes a cylindrical sleeve disposed around and connected to the cylindrical surface of the spool. The cylindrical sleeve includes radial surfaces that act to adjust the spring seats for the centering spring so that axial movement of the cylindrical sleeve results in axial movement of the spool and the spring seats for the centering spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.