The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2001
Filed:
Nov. 24, 1999
Samuel Roland Palfenier, El Paso, TX (US);
Cecilia Hernandez, CD. Juarez Chih., MX;
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A speed sensor (,) includes a sensor housing (,) mounted to the wall of a transmission, and a pole piece (,) extends out of the sensor housing (,) into the transmission fluid. The pole piece (,) is held by a plastic spool (,) within the sensor housing (,), and an electric coil (,) surrounds the spool (,) and is magnetically coupled to the pole piece (,). The spool (,) is formed with a rib ring (,) that extends away from the pole piece (,) and that terminates in an outer periphery that is closely spaced from the inside wall of the sensor housing (,). To block metal particles in the fluid from entering between the spool (,) and sensor housing (,) that would otherwise damage the coil (,), two ribs (,) are formed on the outer periphery of the spool (,), and an interference fit is established between the ribs (,) and the sensor housing (,) such that the ribs (,) are deformed and the contaminants thereby blocked.