Variable flow pump
US6200114A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1997 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Nov 7, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C14/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump having an inlet port, an outlet port and a pumping mechanism for pumping fluid from the inlet port to the outlet port. The pumping mechanism includes a carrier (2) that is provide with a plurality of pumping of pumping elements. The pumping mechanism also includes a flexible cam ring (6) surrounding the carrier and having an internal cam surface that is followed by the pumping elements. The cam ring is flexible so that the discharge flow rate of the pump can be varied by varying the shape of the cam ring. Also, a control device is provided for controlling the shape of the cam ring. The control device and one or more cam orifices for controlling fluid pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.