Variable displacement hydraulic system
US3995973A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1975 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | Sep 4, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/24
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable displacement hydraulic system includes a charge system having a substantially constant charge pressure, a reciprocating piston type pump having a drive chamber in communication with the charge system, and a control valve regulating the flow of fluid from the charge system to the inlet of the reciprocating piston type pump which is manually movable from a closed fluid blocking position through a first range in which it varies and controls the quantity of fluid flowing to the pump inlet and a second range in which it varies the control of pressure of fluid flowing to the pump inlet at flow rates greater than those obtainable in the first range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.