Positive displacement pump
US4412786A · kind A · utility
Inventor
Key dates
| Filing date | Nov 12, 1981 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Nov 12, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04F7/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a positive displacement pump. The pump utilizes a source of rotary motion in the back and forth, clockwise, counterclockwise direction. The rotary oscillatory motion drives an annular piston weight mass in a toroidal rotary track, back and forth within the track in combination with at least a pair of one-way valves to pump fluid through the pump. Specially designed electric motors that rock back and forth, without a 360.degree. rotation, for example, may be coupled to a positive displacement pump of this invention. In the medical profession, this pump may be used to pump liquids at a very slow, precise rate to transmit, for example, a variety of medications into a patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.