Brake wear indicator
First Claim
1. An apparatus for monitoring brake condition for an air actuated diaphragm spring brake actuator having a push rod connecting the vehicle brake to the brake actuator, the push rod mounted for reciprocal movement between an operative position extending from said actuator and an inoperative position retracted within said actuator, comprising:
- (a) a first member connected to the actuator;
(b) a second member cooperating with the first member having an opening for receiving said push rod for movement of said push rod between said operative position and said inoperative position therethrough;
(c) said second member movable with respect to said first member on application of pressure from said push rod;
(d) said second member comprising engaging means for engaging and retaining said second member with respect to said first member when said second member is moved by said push rod to a first predetermined position with respect to said first member corresponding to reciprocating movement of said push rod to a predetermined second operative position indicative of an actual or potential brake problem; and
(e) said engaging means retaining said second member in a fixed position with respect to said first member irrespective of subsequent movement of said push rod.
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Accused Products
Abstract
An apparatus for monitoring brake condition for an air actuated diaphragm spring brake actuator provides a visual or audible signal when brake wear causes a brake push rod to move past a pre-determined distance with respect to the brake actuator housing. The indicator includes an engaging mechanism to retain the indicator in its operative position irrespective of subsequent movement of the push rod. A continuous record of brake failure or serious brake wear or misalignment is thereby provided.
76 Citations
9 Claims
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1. An apparatus for monitoring brake condition for an air actuated diaphragm spring brake actuator having a push rod connecting the vehicle brake to the brake actuator, the push rod mounted for reciprocal movement between an operative position extending from said actuator and an inoperative position retracted within said actuator, comprising:
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(a) a first member connected to the actuator; (b) a second member cooperating with the first member having an opening for receiving said push rod for movement of said push rod between said operative position and said inoperative position therethrough; (c) said second member movable with respect to said first member on application of pressure from said push rod; (d) said second member comprising engaging means for engaging and retaining said second member with respect to said first member when said second member is moved by said push rod to a first predetermined position with respect to said first member corresponding to reciprocating movement of said push rod to a predetermined second operative position indicative of an actual or potential brake problem; and (e) said engaging means retaining said second member in a fixed position with respect to said first member irrespective of subsequent movement of said push rod. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification