Patent ID: 6834628
Filing Date: 2004-12-28
Classification: F01L

Abstract:
A mechanical valve play compensation element for a valve drive on a piston combustion engine, having a first pressure part (1), which is axially displaceable relative to a second pressure part (2) and is held rotatably about the displacement axis, and having a torsion spring element (10), operative between the first pressure part (1) and the second pressure part (2), that is axially resilient at least to a limited extent, and further having at least one helical surface (9.1) on the first pressure part (1), with which surface a corresponding helical surface (9.2) on the second pressure part (2) is associated, the two forming a pair (9) of helical surfaces, wherein the surfaces of the pair (9) of helical surfaces are embodied as rough surfaces and are pressed against one another by the torsion spring element (10), a slide sleeve (3) surrounds the first pressure part (1), a chamber (7.1, 10.3) is surrounded by the pressure parts (1.2), and at least one ventilation bore is provided for the chamber.