Membrane pump with tiltable rolling piston pressing the membrane
US4332534A · kind A · utility
Inventor
Key dates
| Filing date | Dec 12, 1979 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Dec 12, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/0054
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A membrane pump comprising a housing having an inner cylindrical surface, an annular member in the housing and having an outer surface defining with the inner surface of the housing a working space. A hollow rolling piston is arranged in the interior of said annular membrane. An eccentric drive including an arm fixed at one end to a drive shaft carries at its other end a roller engaging the inner surface of the rolling piston for rotating the latter about its axis while pressing the outer surface thereof against the inner surface of the membrane, whereby the outer surface of the membrane is pressed at a revolving sealing region against the inner surface of the housing. The membrane has a clamping portion projecting from the outer surface thereof and being sealingly secured in a corresponding cutout of the housing, so that the working space is divided between the clamping portion and the sealing region in a suction compartment and a pressure compartment with which inlet and outlet passages respectively communicate. The rolling piston is arranged tiltable with respect to the inner surface of the housing and the eccentric drive means so that the sealing region at which the membrane is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.