Ferrofluid piston pump for use with heat pipes or the like
US4967831A · kind A · utility
13Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1988 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Mar 24, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P2003/2278
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A long life, very low friction pump for use in a heat pipe pump or the like s disclosed. A first pump uses magnetically confined ferrofluid rings are both sealer and lubricant for a sliding pump piston in a two sided piston pump that minimizes the seal pressures on both sides of the ferrofluid seals. A second pump uses a magnetically confined ferrofluid slug as a self-sealing and self-repairing pump piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.