Rotary plug valve
US4073468A · kind A · utility
Inventor
Key dates
| Filing date | Sep 16, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Sep 16, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/16
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tapered rotary valve plug fits into a tapered valve chamber and is rotated by an operating head or cap. Cam means are provided to automatically shift the operating head and valve plug axially as the head is rotated. A pin-and-slot connection between the operating head and valve plug is provided whereby rotation of the plug is delayed until the plug has been lifted from its seat, after which rotation of the plug takes place as rotation of the head is continued. Spring means, tensioned during the initial relative rotation of the operating head and plug, are provided for restoring head and plug to their original position relative to each other as soon as the valve plug has been loosened from its seat. Means are also provided for positively stopping rotation of the plug at full open or closed positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.