Pump apparatus
US7758321B2 · kind B2 · utility
30Cited by
12References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2005 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Jan 11, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump apparatus comprises a piston, which is provided displaceably along a first chamber formed in a body under the action of a pilot pressure, an indirect medium composed of a non-compressive fluid and which is to be pressed by the piston, and a diaphragm that is flexibly bendable in cooperation with the indirect medium. When the fluid is discharged from a discharge port, a change in volume caused by the displacement of the piston in the axial direction is identical to the change in volume caused by the displacement of the diaphragm in the axial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.