Pressure override control
US4476680A · kind A · utility
26Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1979 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Aug 14, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/46
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure override control which utilizes pump output flow for destroking of a variable displacement pump to minimize loss of power and generation of heat and which includes modifications to the displacement control valve for the pump and, particularly, the cross connection of displacement-controlling servo motors when the displacement control valve is in a neutral position with blocking of communication of said servo motors to a displacement control pressure and drain whereby the pump cannot be positioned in a maximum displacement position in response to certain system malfunctions in the power override control circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.