Flow controlling apparatus
US7047996B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | May 26, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2642
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A flow controlling apparatus to control flow rate of working fluid discharged from pump apparatus to a power steering apparatus including a electric variable throttle, a solenoid mechanism and a spool. The solenoid mechanism varies opening degree of the electric variable throttle based on a electric signal from electric controller. The spool slides in accordance with the differential pressure of the variable throttle due to increase of flow rate of working fluid discharged from pump apparatus so as to return excess working fluid to bypass passage connecting to a suction port of pump apparatus. The flow controlling apparatus further comprising means for increase flow rate of bypass flow to bypass passage when rotating speed of the pump apparatus exceed predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.