Trailer hitch
US4148498A · kind A · utility
Inventor
Key dates
| Filing date | Oct 17, 1977 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Oct 17, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G11/36
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Improvements in trailer hitch apparatus of the type used in heavy hauling, particularly for the transport of mobile home structures. The apparatus includes hydraulically elongatable tongue structure with height adjustable connector ball assembly as supported from the main rear truck frame structure; the apparatus is utilized in combination with a leaf-coil rear wheel spring structure that provides primary truck suspension. The trailer hitch is operable to support its towed structure in any of the open or closed elongated positions in order to better enable certain vehicle maneuvers, achieve optimum handling in emergency situations, and provide a more rugged, yet smoother riding connection to the towing vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.