Hydraulic control arrangement
AssigneeBosch Rexroth AG
InventorsHeinrich Loedige, Christoph Keyl
Life of this patent
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Abstract
What is disclosed is a hydraulic control arrangement for controlling a hydraulic consumer, comprising an adjustable supply measuring orifice and an adjustable drain measuring orifice as well as a pressure compensator arranged in a pressure medium delivery. The control arrangement moreover comprises a releasable cut-off block that acts as a check valve in the direction of supply and may be released in the direction of drain by means of a control pressure. In accordance with the invention, the pressure compensator is subjected to a constant force in the opening direction and to the lower one of the pressures downstream from the supply measuring orifice and upstream from the drain measuring orifice in the closing direction.
Claims10
A hydraulic control arrangement for controlling a hydraulic consumer, comprising an adjustable supply measuring orifice and an adjustable drain measuring orifice, a pressure compensator arranged in a pressure medium delivery for controlling the pressure medium volume flow across the supply measuring orifice and comprising at least one releasable cut-off block that acts as a check valve in direction of supply and is releasable by means of a control pressure (px) in the direction of drain, characterized in that the pressure compensator is subjected to a constant force (px) in the opening direction and to the lower one of the pressures downstream from the supply measuring orifice and upstream from the drain measuring orifice.
Dependencies are inferred from the claim text.