Dual discharge hydraulic pump and system therefor
US6641372B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2002 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Aug 26, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2/3446
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic pump includes a housing, a primary discharge outlet, an auxiliary discharge outlet, and a flow control valve for controlling fluid flow from the primary and auxiliary discharge outlets. A first fluid passageway within the housing passes fluid from a first discharge port to the primary discharge outlet, and a second fluid passageway within the housing passes fluid from a second discharge port to a common port of the flow control valve. In a first position, the valve directs fluid from the second discharge port to the primary discharge outlet. In a second position, the valve diverts fluid from the second discharge port to the auxiliary discharge outlet. The valve may be positioned in response to such operating conditions as excessive pressure differential between the high and low-pressure sides, excessive pump rate of rotation (RPM), or excessive rate of fluid flow, among others.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.