Check valve for an electromagnetic fluid pump having a dual valve seat
US4827968A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Jan 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7934
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A check valve having a dual valve seat, a valve member, a retainer, and a valve spring. The dual valve seat has a cylindrical body having an axial bore therethrough. A conical valve seat is provided at one end of the axial bore and a flat valve seat is provided at the other end of the axial bore. A recess is provided in the face of the cylindrical body at the end having the conical valve seat to form a first retainer seat and an annular recess is provided about the flat valve seat to form a second retainer seat by inverting the valve seat, the check valve may accept either a stem valve member having a conical sealing surface or a flat valve member having a flat sealing surface. The embodiment of this check valve in an electromagnetic fluid pump permits it to have different operating characteristics depending on which valve member is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.