Apparatus for positioning an adjusting member
US4574687A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1985 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Mar 29, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B9/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus for positioning an adjustable member as a function of a command signal and a control condition, especially for the positioning of a hoisting mechanism on a tractor or the like, comprises an operating circuit and a control circuit. The operating circuit has a bidirectional positionable valve with a valve side and first and second control devices for regulating flow of pressure medium from a supply tank to the adjustable member. The control circuit connects a control pressure medium source to the control devices at first and second junctions and includes adjustable throttles and a flow-regulating valve. A first adjustable throttle is connected between the supply tank and the first junction. The second adjustable throttle is connected between the control pressure medium source and the first junction and in series with the first adjustable throttle. Third and fourth throttles are connection in series with the third throttle being connected between the supply tank and the second junction, and with the fourth adjustable throttle being connected between the control pressure medium source and the second junction. The flow regulating device is connected between the control pres…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.