Guide arrangement for expanding gate valves
US4279404A · kind A · utility
9Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1979 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Oct 17, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K3/186
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The gate assembly (24) of an expanding gate valve has projecting pins (74, 76, 78) which engage guide surfaces (54, 66) of guide rails (52, 64) in order to maintain the gate assembly in a collapsed condition between its open and closed positions. At the fully open and fully closed positions, the pins register with gaps (56, 58, 60, 68, 70) in the guide surfaces to permit expansion of the gate assembly against a pair of valve seats (20, 22).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.