Drum brake with controlled torque and torque control valve for such a brake
US4503954A · kind A · utility
2Cited by
3References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1981 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Dec 3, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/34
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The brake comprises a torque control valve comprising a main piston which cooperates via a bearing piece with a shoe of which the bearing force is representative of the torque supplied by the brake during operation of the brake motor. The main piston controls the pressure admitted to the brake motor by a cut-off valve responsive to displacement of the main piston and by a variable volume decompression chamber of which a movable wall decompresses the fluid contained in the brake motor when the torque generated by the brake exceeds the limit of a predetermined torque-pressure law.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.