Power assist hydraulic steering system with on demand pump
US8769944B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 2009 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Aug 13, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H25/30
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A power assisted hydraulic steering system comprises a helm pump hydraulically connected to a first hydraulic actuator. A power assist pump is hydraulically connected to a second hydraulic actuator. The first and second hydraulic actuators are coupled. A flow sensing mechanism is disposed along a hydraulic conduit which hydraulically connects the helm pump to the first hydraulic actuator. The flow sensing mechanism senses when fluid flows from the helm pump to the first hydraulic actuator. A motor actuates the power assist pump when the flow sensing mechanism senses that fluid is flowing from the helm to the first hydraulic actuator. In one embodiment the first hydraulic actuator is a servo cylinder and the second hydraulic steering actuator is a drive cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.