Control valve
US4624281A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | Nov 25, 1986 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8803
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control valve comprises a body having a fluid inlet and a fluid outlet and a rotary member provided with two separate internal passages, each capable of connecting the fluid inlet to the fluid outlet, according to the angular position of the rotary member in the said body. A control system is arranged in one of the passages for controlling fluid along the passage independent of the angular position of the rotary member, while the control of flow of fluid in the other passage is effected by adjustment of the angular position of the rotary member. The one passage is the main passage for normal use and the other passage is a secondary or by-pass passage for use when work is required to be done on the control system in the one passage. The control system in the one passage comprises valve members operated by a rod for closing seats in the passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.