Patent ID: 6254274
Filing Date: 2001-07-03
Classification: B63H,F16C

Abstract:
A traveler, comprising:a) a track with two side grooves, having a top;b) a car slideable along said track, said car having two lateral side portions, each side portion having lateral bearing means for engaging said track side grooves, said car having a center portion, said center portion having a bottom wall facing and passing over said track top; said bottom wall having first and second lateral sides;c) a plurality of thrust bearings held in a generally oval race in said car center portion bottom wall, said generally oval race having a circumferential plane substantially parallel with the plane of said car center portion bottom wall; said generally oval shaped race having two elongated sections, a first of said two elongated sections along said car bottom wall first lateral side and a second of said two elongated sections along said car bottom wall second lateral side; said thrust bearings rotatable about said generally oval shaped race as said car moves along said track with said bearings movable in a first direction along one of said two elongated sections and in an opposite return direction along the other of said two elongated sections.