Charge control valve and piston assembly for diaphragm pump
US4068982A · kind A · utility
40Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/067
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus for reciprocating a piston in a diaphragm pump wherein the piston alternately pressurizes and relieves an oil filled chamber having a diaphragm separating the chamber from a liquid pumping chamber, the invention comprising a bearing shoe interposed between the piston and driving crank shaft, wherein the shoe has oil ports for lubricating and for relieving excess fluid volume from the oil chamber during each piston stroke.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.