Patent ID: 6056252
Filing Date: 2000-05-02
Classification: B65G

Abstract:
A support assembly for a telescopic frame having an elongate base frame and an elongate extendable frame reciprocally movable in a longitudinal direction along the base frame, the support assembly being connected to the base frame for supporting at least a portion of said extendable frame and comprising:a pivot plate device pivotally connected to said base frame for pivoting about a primary pivot axis that is substantially transverse to the longitudinal axes of the base frame and the extendable frame;first and second bearing plates pivotally mounted on said pivot plate device for pivoting about a first pivot axis and a second pivot axis respectively, said first pivot axis and said second pivot axis being located on opposite sides of said primary pivot axis such that said pivot plate device functions as a first class lever responsive to forces applied thereon by said bearing plates; andat least two support rollers, one of said support rollers being rotatably mounted to said first bearing plate and another of said support rollers being rotatably mounted to said second bearing plate, said support rollers engaging said extendable frame such that the extendable frame rolls along said support rollers when the extendable frame is moved along the base frame.