Single-cylinder, truck-mounted brake assembly
US4793446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1986 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Dec 10, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61H13/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A single-cylinder, truck-mounted brake assembly for a railway vehicle truck in which low-cost, lightweight, truss-type brake beams are employed, with one beam having the single brake cylinder mounted thereon. Force-transfer levers pivotally-mounted to the respective brake beams at the beam-midpoint are interconnected by force-transmitting members that pass through openings in the bolster to move the brake beams into brake shoe/wheel engagement when a brake application is made. The brake rigging is set up so that the transfer lever bail imparted to the force-transmitting members is split. With respect to the force-transfer lever connected to the one force-transmitting member (brake cylinder), this has the effect of the brake cylinder piston skewing equally on opposite sides of the cylinder centerline to prevent piston seal leakage. In addition, diagonally-opposed lever arms of the respective force-transfer levers are greater in length than the other lever arms to obtain brake force multiplication without unbalancing the brake shoe forces. A further advantage found by making the one transfer lever arm longer than the corresponding lever arm of the other transfer lever is to split the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.