Patent ID: 9032861
Filing Date: 2015-05-19
Classification: B66B,F15B

Abstract:
1. A lift control valve comprising: an arrangement for a variable throttle cross-section for a fluid flow, comprising: wherein the second fluid chamber and the second side of the throttle cross-section is one of connected or connectable with the third connecting port, wherein the lift control valve is formed in such a way that: an automatic connection of the second fluid chamber with the third fluid chamber occurs by the switching arrangement during a connection of the first fluid chamber and the first side of the throttle cross-section with the first connecting port, and an automatic connection of the first fluid chamber with the third fluid chamber takes place by the switching arrangement during a connection of the first fluid chamber and the first side of the throttle cross-section with the second connecting port, wherein a valve connects the supply of fluid to the hydraulic actuator of the main valve to the second connecting port when a certain pressure is reached at the first connecting port.