Wheel-speed sensor

Details Wheel-speed sensor Wheel-speed sensor

2007-10-30

2007-10-30

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

C324S207250, C324S207200

Reexamination Certificate

active

11137139

ABSTRACT:
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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patent: 2003/0160605 (2003-08-01), Michalek et al.
patent: 670471 (1995-09-01), None

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