Self-energizing disc brakes
US5012901A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Sep 25, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2125/36
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A compound disc brake comprises a pair of pressure plates with a ball and ramp camming mechanism, one of the plates comprises a driven plate keyed to a rotating axle shaft to be braked, and the other plate comprises an input plate carried from the driven plate by the camming mechanism. The input plate is of larger diameter than the driven plate with its radially outer region comprising a torque-transmitting mechanism which transmits torque applied to that region by primary braking device, which can be a spot brake, to the central region of the input plate. Retardation of the input plate by the primary braking device causes the pressure plates to separate axially and move into engagement with relatively stationary braking surfaces in a brake housing whereafter servo braking occurs. Various multi-plate embodiments are disclosed, including embodiments in which the torque-transmitting mechanism is a separate annular disc keyed to the outer peripheral edge of the servo plate. Other modifications of the pressure plates are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.