Method and device for fitting a rotary throttle unit in a pipe
US5168890A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Mar 25, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/598
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and device are disclosed for fitting a shaft-butterfly valve unit in a pipe formed by a butterfly valve body. The device comprises a frame receiving the pipe with its unit. It also comprises a first thruster for moving the shaft in a first direction as far as the first abutment position and a second thruster for moving the shaft in the opposite direction as far as the second abutment position. A sensor detects the abutment positions, and the gap (j) between the abutment positions is computed. The first or second motor is controlled for moving the shaft from the first or second abutment position by a distance equal to a predetermined fraction of the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.