Pad-wear-limit warning device for disc brake

Brakes – With condition indicator – Electrical

Patent

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Details

F16D 6602

Patent

active

044600674

ABSTRACT:
A device for warning the allowable wear-limit of a pad assembly in a disc brake. The device comprises (a) a vibration member composed of (i) a fixing portion secured to a lateral end portion of a backing plate of the pad assembly, (ii) a spring portion bent into a curve as an extension from the fixing portion for being located on the rear side of the pad assembly, and (iii) a vibrating portion extended from the spring portion, passing through between the lateral end portion of the backing plate and a torque member movably supporting the same, toward the friction surface of the disc rotor as far as almost reach at a tip thereof a wear limit of the pad assembly, (b) a supporting member supporting the vibrating portion at a root portion thereof against biasing force of the spring portion, and (c) a projection disposed on either the supporting member and the vibration portion for determining contact position therebetween. The vibrating portion produces the alarming sound according to natural frequency thereof which is determined by the length from the projection up to the tip of the vibrating portion.

REFERENCES:
patent: 3141524 (1964-07-01), Mishler
patent: 4037689 (1977-07-01), Maehara
patent: 4085827 (1978-04-01), Kestermeier

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