Trailer jacking device
US3944259A · kind A · utility
Inventor
Key dates
| Filing date | Jan 20, 1975 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Jan 20, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60D1/66
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved trailer jacking device and method. The device comprises a trailer tongue frame, an adjustable pivotal strut mounted medially of said frame, and caster and wheel provided with a lock at the lower end of the strut. To connect a vehicle to a trailer equipped with such device, the strut stands in a position back past vertical, holding the tongue and female hitch member at a predetermined height, and the vehicle above the elevation of the hitch ball is backed toward the trailer tongue. As the vehicle pushes the trailer tongue backward, the strut will pivot forward, lowering the female member on the ball hitch and removing the weight of the trailer tongue from the strut. The strut is then moved upward to stowage position, or removed for stowage in the vehicle. To unhitch a trailer from a hitch ball, the strut is placed so that its wheel rests upon the ground in a forward position, the wheel is locked, and as the vehicle is driven forward the strut pivots backward to a position past vertical, raising the trailer tongue and female hitch member above and off of the ball hitch, thus disengaging the trailer from the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.