Brake shoe assembly having a brake lining wear and temperature sensor
US6236310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Nov 3, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2066/001
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A brake shoe assembly includes a brake lining and a housing. The brake lining has a predetermined thickness which gradually wears away and increases in temperature during a vehicle braking application. The housing is positioned to wear away and increase in temperature concurrently with the brake lining. An electrical wear loop circuit is encapsulated in the housing for directing power from a power source to a remote indicator in response to a wear opening in the loop circuit. A thermally sensitive switching element is encapsulated in the housing and connected in electrical series with the wear loop circuit for directing power from the power source to the remote indicator in response to the temperature of the housing exceeding a predetermined temperature threshold. In a preferred embodiment, the switching element has a first resistance when the temperature of the housing is below the predetermined temperature threshold and a second resistance which approximates an open circuit when the temperature of the housing is above the predetermined temperature threshold. Thus, when the temperature of the housing is above the predetermined temperature threshold, the second resistance of the sw…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.