Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Reexamination Certificate
2005-06-28
2005-06-28
Deb, Anjan K. (Department: 2858)
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
C324S173000
Reexamination Certificate
active
06911817
ABSTRACT:
A wheel-speed sensor for generating signals representative of the wheel-speed of an individual wheel on a vehicle. Unlike known wheel-speed sensors, the wheel-speed sensor in accordance with the present invention is readily serviceable without disassembly of major components of the wheel assemblies and is relatively simple, and thus less expensive to manufacture, than known wheel-speed sensors. Two embodiments of the wheel-speed sensor in accordance with the present invention are disclosed. One embodiment relates to a “between-the-rows” wheel-speed sensor which includes a magnetic exciter ring that is adapted to be affixed to a rotating axle between rolling element rows of a wheel bearing. In an alternate embodiment of the invention, the wheel-speed sensor is configured to form a grease seal which typically inserts into the end of an axle tube. A wheel-speed sensor utilizes a multiple pole magnetic exciter ring that is adapted to be attached to a rotating axle shaft. The wheel-speed sensor includes a two-piece stator which also functions as a grease seal which concentrates flux from a rotating multiple pole exciter ring. A coil of magnet wire or, alternatively, an active Hall effect device is used as the sensor and connects the two stator pieces, forming a flux bridge.
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American Electronics Components, Inc.
Deb Anjan K.
Katten Muchin & Rosenman LLP
Paniaguas John S.
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