Diaphragm pump with adjustable stroke length
US6004105A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1998 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Feb 23, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2201/0206
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid powered diaphragm pump with an adjustable stroke is provided. The stroke of the pump is adjusted by providing an inner diaphragm plate assembly that includes a retractable piston. The piston is biased towards the inner plate by one or more standoffs that attach the piston to the plate. The bias of the piston is overcome by pressurized fluid that is communicated to a chamber defined by the piston and the inner plate. The fluid may be communicated to the chamber through the diaphragm rod. The inner diaphragm plate assemblies of both diaphragm chambers may be connected to different pressurized fluid supplies there enabling the stroke or capacity of the two diaphragm chambers to be controlled independently. As a result, the stroke or capacity of the two diaphragm chambers may differ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.