Quick change valve trim assembly
US4041973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 1975 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | May 2, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6058
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is a valve trim assembly wherein a valve cage member and a valve plug are provided which cannot be independently rotated. A valve stem is affixed to the plug and extends out of the cage. The cage and the stem are threaded for attachment to a valve bonnet and an actuator, respectively, and by rotation of the cage, the cage is attached to the bonnet and the stem is attached to the actuator simultaneously. The stem is prevented from unscrewing from the actuator while the valve is in use, by means of the anti-rotation feature. The trim assembly can thus be installed in, or removed from, a valve quickly and with a minimum number of tools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.