Wear indicator
US5697472A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Feb 9, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/22
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention relates to an indicating apparatus to determine the amount of wear that has occurred in the friction material of a brake assembly or other friction coupling. The apparatus utilizes a pin member that is positioned in a sealed bore in the housing of the friction coupling. A first end portion of the pin member is positioned for contact and movement of an actuating piston when the piston is in an engaged position. The distance between the a second end portion of the pin member, housed within the bore, and an outer surface of the housing may be determined by a depth gage. Measurements may be taken to determine movement of the pin member within the bore and thereby establish the amount of wear of the friction material in the friction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.