Universal trailer hitch
OwnerTrevor Craveninventor
Life of this patent
Estimating the term…
Abstract
A connecting device is disclosed for joining a trailer to a towing vehicle for substantial horizontal and vertical pivotal movements, as well as longitudinal rotation, of the trailer relative to the towing vehicle. A shaft added to one yoke of a pair of yokes comprising a universal joint is journalled in a block for rotation through 360 degrees. A similar shaft having a stop at its outer end and secured to the other yoke of the universal joint is inserted into a split block which functions as a quick-release clamping device upon closing of the block to secure the shaft. The bearing block preferably is affixed to the tongue or tow bar of the trailer and the split block is secured to the towing vehicle, the connecting device may be reversed end-for-end.
Claims13
A trailer hitch for detachably connecting a trailer to a towing vehicle comprising, in combination:
- a universal joint having a pair of pivotally interconnected yokes, each yoke having a longitudinal axis and mounted for pivotal movement about a transverse axis,
- a shaft secured to one yoke in axial alignment with the yoke longitudinal axis,
- a bearing block journalled on said shaft for rotation of the shaft therein,
- means for restraining said shaft from axial separation from said bearing block,
- a second shaft secured to the other yoke in axial alignment with the longitudinal axis of said yoke, said second shaft having a free end and an annular shoulder formed on said free end,
- a connector adapted to receive said second shaft for releasable engagement, said connector comprising a base having a longitudinal groove formed therein for receiving said second shaft, a closure member pivotally mounted on said base adapted to co-operate with the base when closed to rigidly lock the second shaft within the groove of the base of the connector,
- means for connecting one of said bearing block and said connector to the towing vehicle and means for connecting the other of said bearing block and connector to the trailer whereby said trailer is free to pivot horizontally and vertically relative to the towing vehicle and is free to rotate longitudinally relative to said towing vehicle.
A trailer hitch as claimed in claim 6 in which the base has a transverse groove formed therein and the closure member has a mating transverse rib with a central recess adapted to seat in said transverse groove and straddle the second shaft, a slot formed in the transverse rib, and a locking lever pivotally mounted in said base adapted to pivot into and out of said slot for engagement therewith when the cover member is closed for locking said closure member on the base.
A trailer hitch as claimed in claim 12 in which the closure member has at least one threaded hole formed therein and a set screw adapted to be threaded into the hole for abutment on and engagement with the second shaft to prevent rotation of the second shaft within the connector.
Dependencies are inferred from the claim text.