Combined hydropneumatic brake cylinder/air reservoir device with automatic double-acting slack adjuster arrangement
US4619348A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1984 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Apr 18, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A combined hydropneumatic brake cylinder/air reservoir device having a hydraulic piston formed on the end of a push rod through which interconnected, different sized, pneumatic pistons operate to transmit the desired brake force. The hydraulic piston operates in a hydraulic cylinder having a slack adjuster piston arranged to supply or reduce the hydraulic fluid in the braking circuit in order to compensate for overtravel and undertravel of the pneumatic piston assembly due to brake shoe wear and brake shoe replacement respectively. The double-acting slack adjuster action results in the stroke of the pneumatic piston assembly being maintained constant to assure continued optimum operating efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.