Internal shoe-drum brake
US4678067A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Jul 29, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2127/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An internal shoe-drum brake includes a first actuator disposed between one pair of adjacent brake shoe ends, a strut extending between the shoes adjacent the actuator, an abutment device disposed between the other pair of adjacent shoe ends, and a mechanical second actuator. Lever arms are pivotally engaged with the strut at spaced locations and are operatively associated with the second actuator. Rollers carried by the lever arms engage the brake shoes at intermediate locations lengthwise thereof so that actuating forces from the second actuator are applied to the shoes at said intermediate locations to initiate duo-servo operation of the brake.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.