Patent ID: 7448585

Claim:
A support assembly comprising: a. a bracket member configured to attach to an underside surface; b. a support platform; c. a first arm having a first end and an opposite second end, the first end pivotally connected to the bracket member and the second end pivotally connected to the support platform; d. a second arm having a first end and an opposite second end, the first end slideably connected to the bracket member and the second end pivotally connected to the support platform; e. a cam member attached to said first arm adjacent its first end and pivotally connected to the bracket member; f. a roller bearing operatively mounted to said bracket member and configured to cooperatively engage said cam member; and g. wherein said roller bearing selectively applies pressure through said cam member to said first ends of the first and second arms to selectively lock and release movement of the first ends relative to the bracket member.