Patent ID: 6642709
Filing Date: 2003-11-04
Classification: G01D,G01P

Abstract:
A tone wheel for signaling the rotational speed of a wheel in a land vehicle comprising a unitary body formed of sheet steel, the body including a center portion and a rim portion radially outward of the center portion and concentric about a central axis, the rim portion having a multitude of elongated substantially identical generally axially oriented teeth, each tooth being separated from adjacent teeth by slots of substantially identical width, each tooth having a generally rectangular cross-section in a plane perpendicular to its longitudinal axis, the width of a tooth being substantially less than the length of a tooth and the width of a slot being similar to the width of a tooth, the center portion having a periphery formed by generally radially extending roots each supporting a respective one of said teeth, said roots being arcuately spaced from one another by gaps that merge with associated ones of said slots.