Systems and methods for retarding the speed of a railcar
US8413770B1 · kind B1 · utility
4Cited by
15References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2009 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | Aug 9, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61K7/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Systems and methods for retarding the speed of a railcar are provided. A supply of pressurized hydraulic fluid is provided to a piston cylinder to actuate the cylinder and thereby move a brake into a closed position in which the brake will apply a predetermined braking pressure to a wheel of the railcar. An accumulator accumulates fluid from the circuit when the wheel forces the brake out of the closed position and supplies accumulated fluid back to the circuit as the brake moves back into the closed position to thereby maintain a substantially constant braking pressure on the wheel as it moves through the retarder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.