Peristaltic tube pump with means preventing complete occlusion of tube
US4131399A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1976 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Jul 2, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/0072
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A peristaltic pump equipped with at least one peristaltic tube is disclosed characterized in that the said tube is associated with means which limit its occlusion, independently of the physical and/or mechanical stresses to which it may be subjected. The peristaltic tube is provided with at least one longitudinal groove or ridge on the internal surface of its wall. Alternatively, a strand may extend longitudinally inside the peristaltic tube, at least over the part subjected to the action of the pressing devices, and this strand is rigid or semi-rigid and has the shape of an arc of a circle. The strand may be flexible and may be firmly attached to the peristaltic tube at least at a point located upstream from the pressing devices. Various other geometrical arrangements are disclosed. The peristaltic pump is especially adapted to extracorporal blood circulation. The peristaltic tube is of such dimensions that when flattened transversely, there remains at least one passage, the ratio of the cross-section of the passage to the cross-section of the channel of the tube at rest being between 1/10 and 1/10,000. The peristaltic tube consists of a silicone elastomer and may be coated on the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.