Expanding gate valve assembly
US4341369A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Apr 25, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K3/186
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gate valve (10) has an expanding gate assembly (34) for reciprocal movement transversely of the flow passage (16, 18). The expanding gate assembly (34) includes a gate element (68) and complementary segment (70) which expand away from each other when the gate assembly (34) is in either a fully open or closed position. A spring (92) is anchored to a side (87) of the gate element (68) and extends over and engages a pair of spaced apart lugs (88, 90) on the adjacent side (91) of the segment (70). The lugs (88, 90) are positioned so that the movement of the gate element (68) relative to the segment (70) from the fully collapsed position results in the spring (92) exerting at least seventy percent of its total force on the lug (88 or 90) that is leading with respect to the direction of relative movement of the segment (70).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.