Check valve with damping device
US4250916A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1978 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Aug 3, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7852
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A check valve assembly has a damping device for liquid lines and includes a hollow cylindrical chamber, a valve seat, an axially movably supported closure member being movable between an open position of the check valve and a closed position of the check valve in which the closure member lies on the valve seat, a hollow cylindrical guide member having a shell defining an inner space, and a damping piston having two sides and being disposed on the outer periphery of the guide member. The damping piston is firmly connected to the closure member and axially movably guidable in the hollow cylindrical chamber. The shell has throttle openings formed therein at both of the sides of the damping piston for connecting the hollow cylindrical chamber with the inner space. Part of the throttle openings are in communication with the hollow cylindrical chamber in the vicinity of the open and closed positions of the check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.