Flow volume control device for a power assisted steering device
US4396033A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1980 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Aug 29, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2597
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A flow volume control device for a power assisted steering device having a main control valve device, whose main valve spool is movable to establish the communication of an inlet passage with a bypass passage when the flow rate of pressurized fluid supplied from an engine-driven pump to the steering device through the inlet passage and first and second throttle passages disposed in parallel relation exceeds a predetermined value. For safe driving at a high speed, an auxiliary control valve device is further provided, whose auxiliary valve spool is moved to close the second throttle passage when high-speed driving causes pressurized fluid from the pump to increase in volume, to thereby bring about a predetermined pressure drop across said inlet passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.