US 7,320,166 B2
Speed sensor encoder wheel and method of making
Chad David Bauer, Fenton, Mich. (US)
Assigned to Freudenberg-NOK General Partnership, Plymouth, Mich. (US)
Filed on Jun. 23, 2004, as Appl. No. 10/874,838.
Prior Publication US 2005/0283968 A1, Dec. 29, 2005
Int. Cl. B21B 1/46 (2006.01); H01F 7/06 (2006.01)
U.S. Cl. 29—417  [29/602.1; 29/527.2; 29/527.3; 264/427; 324/166] 5 Claims
OG exemplary drawing
 
1. A method of making an encoder for use in a speed sensor, the method comprising:
providing a metal tube;
extruding a material containing ferrite over the metal tube to produce an encoder tube;
cutting the encoder tube to a given length to form an encoder; and
magnetizing the encoder within a magnetic field.