Adaptor device for trailer dolly wheels and pads

Claim 1

In comBination with the shaft used to raise and lower a truck trailer dolly the improvement comprising an end portion of the truck trailer dolly shaft having an elongated non-circular end portion of smaller cross section than the circular shaft, and defining an axially outwardly facing radially extending shoulder surface therebetween, a sleeve defining at one end an elongated non-circular bore for snugly receiving said shaft end portion, and said sleeve bore having an axial length of approximately three times the cross sectional width of its non-circular contour maximum width, said non-circular sleeve bore having a transverse inner end wall for abutting the end of said non-circular shaft end portion, a threaded bolt extending through aligned openings in said sleeve and in said shaft end portion, said bolt being arranged adjacent the end of said shaft end portion which abuts the transverse inner wall of said bore and spaced therefrom less than the largest cross-sectional width of said non-circular end portion, said sleeve having a tool receiving hexagonal projection on the end axially opposite said elongated non-circular sleeve bore for receiving a conventional socket held in a conventional air motor or the like, and said shaft elongated non-circular end portion and said sleeve bore having equal axial dimensions so that the end of said sleeve opposite said hexagonal projection abuts said shoulder surface on said shaft and said non-circular shaft end bottoms on said transverse inner end wall.