Patent ID: 6564764
Filing Date: 2003-05-20
Classification: F01L

Abstract:
A switchable tappet for directly transmitting a cam lift onto a tappet push rod, in a valve train of an internal combustion engine, comprising:a housing formed with a recess and having a push rod distal end which is formed with a ramp surface for contact by a cam; an inner element disposed in the recess for movement into at least one position in which the inner element is coupled to the housing, said inner element having a push rod proximal end formed with an abutment for the push rod; an attachment secured to the push rod proximal end of the inner element to extend the inner element beyond the recess of the housing, wherein the attachment has a housing-distal end formed with a shoulder; and a helical compression spring, extending between the shoulder of the attachment and a rim or rim-proximal region of the housing, for urging the inner element in a direction of the push rod, and conically expanding, at least partly, in the direction of the push rod and wrapped around the attachment of complementary conical configuration.