Hydrostatic drive system
US5460000A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1993 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | Oct 22, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B13/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydrostatic drive system having consumers (6, 8) connected to a demand regulated pump (1) and actuated by a directional control valve (5, 7) is disclosed. The consumers can be connected downstream of the control valves via return valves to a load-sensing line (12). To provide for load-independent allocation of the delivered flow when the consumers are simultaneously actuated, each directional control valve (5, 7) is assigned a pressure balance (9, 10) which can be controlled directly or indirectly by a signal difference formed from a load pressure signal and a delivered pressure signal. To enable one or more of the consumers (6) to be supplied with pressure medium on a priority basis, so that no reduction in the speed of movement occurs, a priority valve (20) is connected into the LS-line (12) in such manner that in a first operating position of the priority valve (20) the line sections (12b) downstream of the non-return valve(s) of the non-priority consumer(s) (8) are connected to the LS-line (12), and in a second operating position they are connected to a line (4a) which conveys the delivered pressure of the pump (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.