Sensitized ring for use with a sensor

Details Sensitized ring for use with a sensor Sensitized ring for use with a sensor

2007-09-11

2007-09-11

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Dynamometers

Responsive to torque

C073S862325, C073S862329, C324S173000, C324S178000, C324S179000

Reexamination Certificate

active

11167554

ABSTRACT:
A sensitizing ring for sensors having a reduced manufacturing cost and an improved profile shape manufacture with a diameter of 120 mm or less. The sensitizing ring of the present invention is used to measure the rate of rotation and position of a rotating element. The sensitizing ring of the present invention is usable in more applications, especially in the automotive industry. The sensitizing ring comprises a body, a plurality of teeth provided on an outer periphery thereof, and a plurality of gaps interposed between the teeth. The body is made of a polymeric material interspersed with a ferromagnetic material. Alternately, the body is made of a polymeric material having a coating layer of ferromagnetic material. In a further embodiment, the body includes ferromagnetic material in the polymeric material forming the teeth but does not include ferromagnetic material in the polymeric material forming the gaps. Optionally, body includes ferromagnetic material and gaps formed between the teeth do not have ferromagnetic material. Optionally a larger gap is provided on the body and similarly does not include ferromagnetic material.

REFERENCES:
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patent: 4602515 (1986-07-01), Eichenlaub
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patent: 7116096 (2006-10-01), Waszkowski et al.
patent: 2002/0125882 (2002-09-01), Foster et al.
patent: 2003/0230449 (2003-12-01), Nelson et al.

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