Multi-speed drop leg mechanical jack for use with a trailer

Details Multi-speed drop leg mechanical jack for use with a trailer Multi-speed drop leg mechanical jack for use with a trailer

B - Operations, Transporting

66

F

B66F 3/20 (2006.01) B60S 9/02 (2006.01) B66F 3/10 (2006.01) B66F 3/44 (2006.01)

Patent

CA 2531272

A mechanical jack that is used with trailers that has a functional combination of several working gears as well as a drop leg feature is disclosed. The mechanical jack has a gearbox having gears that not only have the capacity to handle a relatively heavy load, but also have the ability to handle small and midsize loads while maintaining sufficient and commercially acceptable cranking speeds without excessive force required. The jack includes a crank or handle for use with the mechanical jack that assists in both effective raising and lowering of the jack, as well as efficient transition from one working gear to another. The jack may also utilize an electric motor as the source of input power to the jack.

L'invention concerne un vérin mécanique utilisé sur des remorques. Le vérin a une combinaison fonctionnelle de plusieurs engrenages de travail ainsi qu'une fonction escamotable. Le vérin mécanique comporte une boîte de vitesses à engrenages qui non seulement peut supporter une charge relativement lourde, mais qui peut aussi supporter des charges petites et moyennes tout en maintenant des vitesses de lancement suffisantes et commercialement acceptables, sans nécessiter une force excessive. Le vérin comprend une manivelle ou une poignée destinée à être utilisée avec le vérin mécanique en vue de favoriser le soulèvement et l'abaissement du vérin, ainsi que la transition efficace d'un engrenage de travail à un autre. Le vérin peut également utiliser un moteur électrique comme puissance d'entrée au vérin.

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