US 11,951,947 B2
Stair system for vehicle
Deepak Kapur, Naperville, IL (US); David Bruford, Shelby Township, MI (US); Aleyna Kapur, Dearborn, MI (US); Robert Grinstead, Chisago City, MN (US); and Roman Kapur, Naperville, IL (US)
Assigned to Opus Mach LLC, Naperville, IL (US)
Filed by Opus Mach LLC, Warren, MI (US)
Filed on Nov. 5, 2021, as Appl. No. 17/453,687.
Claims priority of provisional application 63/109,921, filed on Nov. 5, 2020.
Prior Publication US 2022/0134957 A1, May 5, 2022
Int. Cl. B60R 3/02 (2006.01); B60Q 9/00 (2006.01)
CPC B60R 3/02 (2013.01) [B60Q 9/008 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A stair system for providing access to a cargo platform of a commercial vehicle, the stair system movable between a deployed configuration and a stowed configuration, the stair system comprising:
at least one mounting bracket configured to be attached to the cargo platform of the vehicle;
a stair assembly pivotally attached to the at least one mounting bracket at a first pivot location, the stair assembly comprising a first support frame comprising a pair of opposing frame rails and a plurality of step platforms secured to the frame rails of the first support frame, wherein at least one frame rail comprises a side plate comprising an elongated slot extending along a length of the side plate; and
a handle assembly pivotally attached to the at least one mounting bracket at a second pivot location and pivotally and slidably attached to the side plate of the at least one frame rail of the stair assembly, the handle assembly comprising at least one hand rail having a lower end and an upper end, and at least one second support frame connected to the at least one hand rail; and
at least one pin coupling the at least one second support frame to the at least one frame rail of the stair assembly, the at least one pin at least partially disposed in the elongated slot of the side plate of the at least one frame rail;
wherein, when stair system moves between the stowed configuration and the deployed configuration, the stair assembly and the handle assembly move concurrently;
wherein, when in the stowed configuration, the stair system is configured to be positioned beneath the cargo platform and to extend generally parallel to the cargo platform; and
wherein, when in the deployed configuration, the stair system is configured to extend outwardly and downwardly from a side of the cargo platform, and the upper end of the at least one hand rail is configured to extend over an upper side of the cargo platform.