Reversing valve for combination meter
US4487217A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1982 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Jun 17, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7781
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A reversing valve for a combination meter, including a closure element, movable in the axial direction, which is provided with a cylindrical closure ring which in the closed position of the reversing valve covers radially outwardly directed valve openings, and having at least one channel extending essentially axially associated therewith, which channel is closed in the closed position though already after slight shifting of the closure element in the direction of its open position communicates the working chamber of a hydraulic adjustment member with the main flow. The working chamber additionally has a presettable opening which is always open in the direction of the auxiliary flow or total flow. The effective-pressure-cross section of the closure element is suddenly enlarged inwardly during opening, and is reduced in a sudden manner during closing, by having the main flow act on the working chamber. This hydraulically effected change of the force which is effective counter to the spring makes possible the quick opening and closing of the reversing valve in one stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.