Shut-off device for pipes
US4770392A · kind A · utility
Inventor
Key dates
| Filing date | Jan 30, 1987 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Jan 30, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
For a shut-off device comprising a tubular housing to be built into a pipe and a rotary valve for which a driving shaft penetrating the housing and a seat in the housing are provided, a ring wheel (4) with movable bearings (9) being disposed on the driving shaft (10) and the valve flap (3) being guided in the ring wheel (4) and connected with the driving shaft by a gearing (22, 23) which locks when the valve flap (3) swivels in and serves to press the valve flap (3) onto its seat (32), the invention provides for the following: when the driving shaft (10) is rotated back, the gearing (22, 23) lifts the valve flap (3) axially off the seat (32) until the valve flap (3) is supported on the ring wheel (4), and the gearing (22, 23) constitutes the connection between the valve flap (3) and the driving shaft, the valve flap (3) being supported on the ring wheel (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.