Fluid pressure control devices
US3946561A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/47
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control device for connection between a hydropump and a hydromotor of a hydraulic system, to provide a control pressure for regulating operation of the system, has a valve housing accommodating a displaceable valve member formed to provide a throttling passageway between an inlet and a main outlet of the housing. Fluid flow through the throttle tends to move the valve member to open a connection between the inlet and a control pressure outlet of the housing, against the action of a resilient biasing arrangement and a force produced on the member in dependence upon the control pressure itself. The action of the biasing arrangement, however, is variable, enabling the device to be designed in accordance with a desired fluid-pressure/flow rate relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.