Patent ID: 6772721
Filing Date: 2004-08-10
Classification: F01L,Y10T

Abstract:
A phaser for maintaining an angular relationship between a crank-shaft and a cam-shaft or among more than one cam-shaft, comprising:a housing, having at least one locking pin hole and at least one cavity defined by an arcuate outer wall, a first side wall, and a second side wall; a rotor, disposed to move relative to the housing, the rotor including: a hub; a plurality of vanes integral to the rotor and protruding from the hub, the plurality of vanes being disposed to oscillate within their respective chambers formed by the rotor and the housing, thereby maintaining the angular relationship; and a shoulder integral to the rotor extending from the hub into the chamber, wherein the shoulder oscillates with the vane, thereby ensuring that the rotor face is always covering the locking pin hole, such that the locking pin hole is not exposed to the control fluid pressure of the respective chamber of the vane, regardless of vane position; the first side wall and second side wall of the cavity being formed with recesses to accommodate the shoulder; and a locking pin located in the vane and positioned to engage the locking pin hole in the housing.