Check valve pump with electric bypass valve
US8469677B1 · kind B1 · utility
0Cited by
22References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 1, 2007 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jan 21, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B27/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic power unit having a power shaft that rotates a cam. The cam actuates a piston assembly that contains a plurality of pistons wherein each piston has a piston body and fluid working chamber. An electrically actuated bypass valve is fluidly connected and in communication between an outlet check valve and a fluid working chamber of each piston such that when actuated the electrically actuated bypass valve directs fluid away from the outlet port into a reservoir to be returned to an inlet port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.