Means to retain a valve stem
US4270730A · kind A · utility
10Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | May 29, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/22
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A retaining device to hold a butterfly valve stem (26) in the valve body upon a shearing or breaking of the stem. The retaining device is mounted within a bore (38) in the valve body (12) beneath the stem packing and includes pins (44) extending from the stem (26) which engage in abutting relation a support ring (64) mounted in a groove (56) in the bore to restrain any outward movement of the stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.