Convertible rail-highway semi-trailer fluid suspension
US4342264A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Feb 28, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2300/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rail bogie air suspension for a convertible rail-highway semi-trailer using an invaginating air bag secured between an upper air chamber member affixed to the underside of the rear frame of a vehicle and a load support leg assembly, a bumper carried by said upper air chamber member, a plate and shaft assembly spring urged towards said bumper and a pneumatically operable pin supporting said plate and shaft assembly whereby, when air is vented from the bag, air pressure is simultaneously provided which acts on a member that retracts the pin and allows the bumper plate and shaft assembly to move past the pin under the weight of the vehicle to allow the entire assembly to fully retract for the proper elevated stored position of the bogie during the highway mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.