Braking valve arrangement for a hydrostatic drive
US5101630A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1991 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Jan 9, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/761
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a braking valve arrangement for a hydrostatic drive operated in open circuit, in particular for vehicle drives, wherein a hydraulic pressure medium is supplied to the hydraulic motor from the hydraulic pump via a reversing directional control valve as desired through one of two branches each containing a pressure limiting valve and a braking control valve, and the pressure medium is discharged to the tank through the respective other of the two branches. The braking control valve controls the flow of hydraulic medium through the respective branch depending on the pressure in the respective other branch and has parallel with it a non-return valve opening into the hydraulic motor. To reduce the outlay in the valve and lines a valve unit is provided in each branch of which the valve body is formed as a closure body of the non-return valve, urged in the closing direction by a spring, as a control piston of the braking control valve and as the housing for the closure element of the pressure limiting valve, wherein the valve body is urged controllably towards the closure position depending on the pressure in the respective other branch, and thus acts as a control…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.