Hydraulic pump nozzle and method of use
US6666655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Apr 26, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B23/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydraulic flow return system of a transmission pump in which primary and bypass flows of hydraulic fluid are returned to primary and bypass flow channels, respectively, of a booster nozzle situated adjacent the rotating group at the inlet of the pump for delivery a boosted flow of high pressure fluid to the pump as a result of the incoming bypass flow being passed through a flow restrictor before being recombined with the primary flow, the system is improved by incorporating a bypass valve which senses the back pressure in the incoming bypass flow and operates to open an auxiliary bypass channel in the event that the back pressure exceeds a predetermined control value in order to divert a fraction of the bypass flow around the flow restrictor for delivery to the pump until such time as the back pressure falls below the control value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.