Stepless hydraulic door clamp for motor vehicle doors has diaphragm spring that provides force having maxima in between two minima during relative movement of two movable components

摘要

A valve arrangement (4) has a flow control unit (5) having two movable components (9,10). The movable components move against the force of a diaphragm spring (8) to open a flow path and allow hydraulic oil (6) to flow through. During relative movement of the movable components, the diaphragm spring provides a force having a maxima in between two minima. - An INDEPENDENT CLAIM is also included for a hydraulic cylinder.