Auxiliary roller wheel device for immersible boat trailers

Claim 1

An auxiliary roller wheel device for boat trailers and the like comprising, in combination, a body member, said body member comprising a substantially rectangular base plate, a pair of spaced, parallel trunnion members extending outwardly of one side of said base plate, a wheel, means journalling said wheel between said trunnion members, the other side of said base plate comprising means for removably securing said base plate against the underside of a trailer framework I-beam member, said base plate securing means comprising an upstanding wall portion extending outwardly of the other side of said base plate and along one edge thereof, said upstanding wall portion merging, at its outer end, with a top plate portion in spaced, parallel relation with respect to said base plate and defining therewith an open-ended slot, means for clamping said body member to a trailer framework I-beam member web portion received in said slot, said top plate portion being in the form of an equilateral triangle the apex of which extends outwardly of said short, upstanding wall portion for a distance of somewhat less than onehalf the transverse width of said base plate, said clamping means comprising a screw member threadingly received in a threaded opening through said apex portion of said top plate portion, said body member being integrally formed with said base plate, said trunnion members, said upstaning wall portion and said top plate portion, said trunnion members each being integrally formed along their outsides with cenTral, vertically-extending reinforcing rib portions merging at their upper ends into opposed portions of said one side of said base plate.