Force sensor and motor-driven parking brake apparatus using...

Details Force sensor and motor-driven parking brake apparatus using... Force sensor and motor-driven parking brake apparatus using...

2005-06-30

2008-10-28

Siconolfi, Robert A. (Department: 3683)

Brakes

With condition indicator

Electrical

C188S162000, C073S862473, C073S862626, C073S779000

Reexamination Certificate

active

07441632

ABSTRACT:
A force sensor includes a shaft to which a magnet is fixed, and a case which can reciprocate with respect to the shaft and to which a Hall IC element is fixed. The Hall IC element outputs an output voltage which changes in accordance with relative displacement between the Hall IC element and the magnet. A main spring is interposed between the shaft and the case and elastically deforms in accordance with force produced between the shaft and the case in the reciprocating direction. A sub spring is provided in order to impart a preload such that when the amount of elastic deformation of the main spring is substantially zero, no axial clearance is formed between a flange portion of the shaft and one end portion of the main spring, and no axial clearance is formed between the case and the other end of the main spring.

REFERENCES:
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patent: 2005/0189183 (2005-09-01), Gil et al.
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patent: 02/20324 (2002-03-01), None
patent: 02/057122 (2002-07-01), None

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