Patent ID: 9470119
Filing Date: 2016-10-18
CPC Classification: F01L

Claim Text:
1. A camshaft phaser for use with an internal combustion engine for controllably varying the phase relationship between a crankshaft and a camshaft in said internal combustion engine, said camshaft phaser comprising: a stator having a plurality of lobes and connectable to said crankshaft of said internal combustion engine to provide a fixed ratio of rotation between said stator and said crankshaft; and a rotor coaxially disposed within said stator, said rotor having a plurality of vanes extending radially outward from a central hub and interspersed with said plurality of lobes defining alternating advance chambers and retard chambers, wherein said advance chambers receive pressurized oil in order to change the phase relationship between said crankshaft and said camshaft in an advance direction and said retard chambers receive pressurized oil in order to change the phase relationship between said camshaft and said crankshaft in a retard direction, said rotor being rotatable within said stator from a full retard position to a full advance position and being attachable to said camshaft of said internal combustion engine to prevent relative rotation between said rotor and said camshaft; wherein a first portion of said central hub between adjacent ones of said plurality of vanes extends radially outward further than a second portion of said central hub between adjacent ones of said plurality of vanes.