Diaphragm position control for hydraulically driven pumps
US7425120B2 · kind B2 · utility
10Cited by
10References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2005 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | May 26, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/067
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a spool member. The transfer chamber is defined between the diaphragm and piston and is filled with a hydraulic fluid. The fluid reservoir is in fluid communication with the transfer chamber via at least one valve. The spool member is configured to control fluid flow between the transfer chamber and the fluid reservoir. The spool member is movable to open and close an opening into the at least one valve only when an overfill condition or an underfill condition exists in the transfer chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.