Control assembly for power steering
US10604178B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 23, 2018 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Aug 31, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D6/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control assembly (20) for overcoming a rotational resistance required to activate supplementary steering force associated with conventional power steering systems. The control assembly (20) includes a shaft (26) subject to rotational resistance via a torsion bar (62). A valve assembly (22) has a first hydraulic circuit (76) that is interchangeable from an unassisted condition (36) to an assisted condition (34) for providing supplementary steering force to a steering gear after the rotational resistance of the torsion bar (22) is overcome by rotating the shaft (26). An actuator (38) includes a second hydraulic circuit (86) interchangeable from an unengaged condition (42) to an engaged condition (40) applying circumferential force on the shaft (26) to overcome the rotational resistance of the torsion bar (62) and rotate the shaft (26) from a non-rotated position thereby activating the supplementary force of the first hydraulic circuit (76).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.