Automatic adjusting device for a drum brake
US4071123A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1976 |
| Grant date | Jan 31, 1978 |
| Priority date | — |
| Expiry date | Dec 9, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D65/561
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A drum brake of the type comprising two brake shoes adapted to be spaced apart by a wheel cylinder. The distance between the ends of the shoes which cooperate with the wheel cylinder is automatically increased to compensate for the wear of the brake linings by an adjusting device which defines the rest position of the ends. The device comprises an extensible member of the screw and nut type, two annular resilient members which grippingly engage corresponding cylindrical portions of the extensible member, and a cam which rotates the resilient members one relative to the other in a first direction upon a brake application and in the opposite direction upon brake release to limit extension of the extensible member to a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.