Combined power trim and steering system
US4836810A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1988 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Apr 4, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H20/12
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The power steering and trim functions of a marine drive unit are combined in a fluid pressure supply system which utilizes a single electric motor drive hydraulic pump to provide operating fluid for both functions. Fluid pressure to operate the power steering is supplied by an accumulator which, in turn, is charged by the hydraulic pump. The pump is also operable in response to operator input to supply fluid pressure for the trim system. Appropriate controls, responsive to the upper and lower pressures limits of the accumulator, are used both for charging the accumulator and for providing operational priority to the power steering system by disabling operation of the trim system during charging of the accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.