Patent ID: 9545866
Date: 2017-01-17
CPC Classifications: B60P,F15B

Claim:
1. An apparatus for positioning a rear platform of a trailer comprising: a. a control valve connected to a source of pressurized fluid; b. a conduit having a proximal end connected to said control valve; c. at least one airbag for lifting said rear platform, said at least one airbag connected to a distal end of said conduit, and positioned under said rear platform, wherein a proximal end of said rear platform is hingedly attached to a distal end of a deck of said trailer such that said rear platform pivots as the at least one airbag inflates or deflates and a distal end of the rear platform can be lowered to meet the ground when the trailer is on substantially flat, horizontal ground; and d. a position locking system for holding said rear platform at one of multiple positions relative to said deck of said trailer, including positions in which said rear platform is angled below said deck, and positions in which said rear platform is angled above said deck, wherein said locking system is operable to support the weight of said rear platform without support from said at least one airbag.