Variable displacement vane pump adjustable by low actuation loads
US5863189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1995 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Jul 10, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C14/223
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Variable-displacement, single-acting vane pumps in which the cylindrical cam member is adjustably supported within an outer annular cam housing to enable the cam member to be adjustably-rotated relative to the housing to adjust the geometric center of the cam chamber relative to the center of the rotor member and thereby adjust the displacement capacity of the pump between zero-flow maximum flow values. The annular housing for the cam member comprises a roller bearing assembly between its inner race surface and the cylindrical outer surface of the cam member, which minimizes the friction when the cam member is rotated during adjustment and enables the adjustment to be actuated remotely, such as by means of a small motor gear assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.