Boom control valve
US5263514A · kind A · utility
36Cited by
7References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1993 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Apr 20, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86895
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control valve assembly designed to allow operation with minimum power requirements and a rapid response to a "shut off" command. The assembly includes a pair of seal elements which operate in tandem. When the valve is open, fluid passes through a series of chambers and as the valve is closed, a substantial passageway allows fluid to bleed quickly to the outlet and reduce pressure to zero almost instantly, thus achieving almost instant shutoff. The dual seal arrangement is also designed so that internal fluid forces are nearly balanced so that minimal external power is required for proper operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.