Patent ID: 7004292
Filing Date: 2006-02-28
Classification: F16F

Abstract:
1. An adjusting element comprising: a cylinder having an end wall, an inner wall, and an interior space containing a pressure medium; a piston rod projecting from the end wall of the cylinder; an annular seal centered about an axis and having an inner circumference which bears against the piston rod, an outer circumference which bears against the inner wall of the cylinder, a side facing the interior space, and a side remote from the interior space; a supporting element having a first end which supports the annular seal, a second end supported on the end wall of the cylinder, and an axial length between said ends, the supporting element being made of a material which melts or sublimes at a predetermined temperature so that the axial length of the supporting element is shortened during thermal overloading; a supporting disk located between the end wall of the cylinder and the second end of the supporting element; a stop axially extending from the annular seal to the supporting disk, the stop comprising material having a melting temperature higher than the predetermined temperature of melting or subliming of the supporting element and being configured to pierce the inner circumference of the seal when said supporting element melts or sublimes at said predetermined temperature so that the seal is displaced radially outwards; and a passage from the interior space to atmosphere which opens when the seal is radially displaced when said supporting element melts or sublimes at said predetermined temperature.