Positive shut off electromagnetic fluid pump
US4725208A · kind A · utility
5Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Mar 10, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B17/046
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive shut-off electromagnetic fluid pump of the type having a piston electromagnetically reciprocated in a cylindrical guide by a solenoid coil and a pair of valves for providing a unidirectional fluid flow from an inlet port to an outlet port in response to the reciprocation of the piston. An elastomer bumper attached to the piston occludes the outlet port when the piston is biased to its extreme position adjacent to the outlet port when the solenoid coil is de-energized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.