Device for discontinuing and automatically restoring the operational function of a spring brake actuator
US3994205A · kind A · utility
16Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Jan 20, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/086
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An actuator for a spring brake used for parking and emergency has a spring operating on the brake push rod which will apply braking unless fluid pressure in the braking system applied to a piston overcomes spring pressure. To disable the spring brake the rod is retracted by a mechanism coupling the piston to the rod so that the brake is automatically restored into service when the piston is operated by the fluid pressure. The mechanism has a one-way clutch engaging a threaded push rod by means of a nut in non-self-locking engagement on the push rod threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.