Abstract: Piston-cylinder unit comprising a cylinder in which a work space is filled with a work medium and which is limited by a closure and is sealed by at least one seal. The closure is fixed axially by a positive engagement with the cylinder up to a temperature threshold and the closure can carry out an axial movement for relieving pressure above the temperature threshold. A cutting device cancels the sealing function of the seal during the axial movement of the closure for relieving pressure.

Abstract: Switching valve with a valve body, which separates two working spaces filled with a fluid. The valve body has pass-through openings which are covered except for an inlet cross-section, where the inlet cross-section is controlled by a switching disk as a function of the direction of flow in the switching valve. Between the switching disk and the inlet cross-section, at least one spacer disk is provided, which has at least one opening, which communicates with the inlet cross-section, where the opening has a larger two-dimensional area than the inlet cross-section.

Abstract: Piston-cylinder unit comprising a cylinder in which a work space is filled with a work medium and which is limited by a closure and is sealed by at least one seal. The closure is fixed axially by a positive engagement with the cylinder up to a temperature threshold and the closure can carry out an axial movement for relieving pressure above the temperature threshold. A cutting device cancels the sealing function of the seal during the axial movement of the closure for relieving pressure.

Abstract: Switching valve with a valve body, which separates two working spaces filled with a fluid. The valve body has pass-through openings which are covered except for an inlet cross-section, where the inlet cross-section is controlled by a switching disk as a function of the direction of flow in the switching valve. Between the switching disk and the inlet cross-section, at least one spacer disk is provided, which has at least one opening, which communicates with the inlet cross-section, where the opening has a larger two-dimensional area than the inlet cross-section.

Abstract: Disclosed is a vibration damper with a damping valve having a reversing valve. The reversing valve has valve body having at least one passage opening with a cross section therein; a valve plate at least partially covering the passage opening and a reversing plate having at least one meandering shaped recess in the vicinity of the cover surface, and a circumferential section, wherein the recess has a starting point and an end point which bound the circumferential section the reversing plate is adapted to control the cross section of the passage opening as a function of flow direction. The valve includes a spring section extending in a circumferential direction and having at least one cover surface and a clamping surface which prestresses the reversing plate outside of the spring section and clamping surface against the reversing valve. The cover surface is aligned with the passage opening, and the circumferential section bounds the spring section.

Abstract: A reversing valve having a valve body which separates two working spaces which are filled with a fluid. Passage openings are arranged in the valve body and are covered at least partially by a number of valve plates. The cross sectional passage of the passage openings is controlled by a reversing plate as a function of the direction of flow. The reversing plate has spring sections which extend in the circumferential direction and at least one cover surface. The at least one cover surface is aligned with at least one passage opening. The spring sections of the reversing plate are supported on a securing plate.

Abstract: A method for manufacturing a piston, wherein the piston includes a piston body with through-channels for fluid which are covered by valve disks on supporting bodies with valve support surfaces. The piston body is constructed in one piece in a disk-shaped manner by press stamping. Starting from a base body of the piston, the raised areas of the piston body on one side of the piston are formed as depressions on the axially opposite side. The piston has at least one support for the valve disks whose axial height is adapted to the height of the support surfaces. The support on both sides of the piston is stamped from the base body of the piston and the valve support surfaces and the support are machined in the same manufacturing step on a common plane.