Peristaltic pump
US6106249A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Feb 26, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2207/01
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A peristaltic pump for propelling liquid through a flexible tube segment. The pump has a cam shaft which carries a plurality of cams each having a driving surface. The driving surfaces of adjacent cams are spaced at an angle to each other about the cam shaft. The pump also has a plurality of cam followers which are each reciprocal in a common direction perpendicular to the axis of the cam shaft. Each cam follower has a cam surface riding on the driving surface of a cam and a tube engaging surface for engaging the flexible tube segment. At least one of the cam followers is a restriction cam follower of which the tube engaging surface engages the flexible tube segment for a longer period than that of the other cam followers. The pump also has a motor for rotating the cam shaft whereby the cams cause the cam followers to each engage and occlude the flexible tube segment to form a propagating depression wave in the flexible tube segment for propelling liquid. The restriction cam followers prevent back flow of the liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.