Adjustable control valve with limited adjustment range and self locking means
US5404904A · kind A · utility
29Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1993 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Sep 24, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7927
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The control valve includes a spring refiner which is threadly retained in the valve body and which may be adjusted so as to incrementally vary the hydraulic pressure required to open the valve. The valve additionally includes stops or limits so as to prevent the spring retainer from being grossly misadjusted which, when used in the hydraulic control system of the recloser, may cause undesirable miscoordination with the operation of other circuit breakers and protective devices. The valve additionally includes a self-locking mechanism to prevent the valve from falling out of adjustment due to vibration or improper handling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.