Truck trailer hitch
First Claim
1. A trailer hitch for hitching to a motor vehicle a trailer having a draw pole with a first end attached to the trailer and with a second end which is free, the trailer hitch comprising:
- a first coupling member secured to the second end of the draw pole, the first coupling member comprising a coupling ring secured to the second end of the draw pole;
a second coupling member fixedly attached to the motor vehicle and engageable with the first coupling member to hitch the trailer to the said motor vehicle, the second coupling member comprising an upwardly projecting pintle hook with an upper free end fixedly attached to the said motor vehicle;
an arm pivotally mounted on the motor vehicle through a substantially horizontal pivot, said arm having a free end distant from the said pivot and provided with means for supporting the said draw pole, the substantially horizontal pivot being lower than the said pintle hook;
said draw pole supporting means comprises the free end of the pivoting arm formed with an arcuate, convex surface for engaging the underside of said draw polearm rotating means for rotating said pivoting arm about a substantially horizontal pivot, the arm rotating means comprising means for rotating the said arm about a pivot in a first direction of rotation with the draw pole supported by the said arcuate, convex surface to lift the coupling ring until the same is higher than the upper free end of the pintle hook, whereby said coupling ring may be positioned above the pintle hook by moving the motor vehicle toward the trailer with the draw pole sliding on the arcuate surface;
said arm rotating means also comprising means for rotating said pivoting arm about the substantially horizontal pivot in a second direction of rotation opposite to the first rotation direction with the draw pole supported by the arcuate surface when the coupling ring is above the pintle hook in order to lower the coupling ring on the pintle hook and thereby engage the said ring with the said pintle hook; and
whereby, in operation, said pivoting arm is rotated about said pivot with the free end of the arm supporting the draw pole in order to control in height the position of the pole, the second end and the first coupling member and thereby enable engagement of the said first coupling member with the second coupling member.
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Accused Products
Abstract
The trailer hitch comprises an arm mounted on a motor vehicle through a horizontal, transversal pivot, and having a rear, free end distant from the pivot and formed with an arcuate, convex surface for supporting the draw pole of the trailer. The draw pole has its front, free end provided with a coupling ring. The arm is rotated about its horizontal pivot with the arcuate surface supporting the draw pole in order to successively lift and lower the pole free end and therefore the coupling ring and thereby enable engagement of the coupling ring with an upwardly projecting pintle hook secured to the motor vehicle. Engagement of the coupling ring with the pintle hook hitches the trailer to the vehicle.
22 Citations
12 Claims
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1. A trailer hitch for hitching to a motor vehicle a trailer having a draw pole with a first end attached to the trailer and with a second end which is free, the trailer hitch comprising:
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a first coupling member secured to the second end of the draw pole, the first coupling member comprising a coupling ring secured to the second end of the draw pole; a second coupling member fixedly attached to the motor vehicle and engageable with the first coupling member to hitch the trailer to the said motor vehicle, the second coupling member comprising an upwardly projecting pintle hook with an upper free end fixedly attached to the said motor vehicle; an arm pivotally mounted on the motor vehicle through a substantially horizontal pivot, said arm having a free end distant from the said pivot and provided with means for supporting the said draw pole, the substantially horizontal pivot being lower than the said pintle hook; said draw pole supporting means comprises the free end of the pivoting arm formed with an arcuate, convex surface for engaging the underside of said draw pole arm rotating means for rotating said pivoting arm about a substantially horizontal pivot, the arm rotating means comprising means for rotating the said arm about a pivot in a first direction of rotation with the draw pole supported by the said arcuate, convex surface to lift the coupling ring until the same is higher than the upper free end of the pintle hook, whereby said coupling ring may be positioned above the pintle hook by moving the motor vehicle toward the trailer with the draw pole sliding on the arcuate surface; said arm rotating means also comprising means for rotating said pivoting arm about the substantially horizontal pivot in a second direction of rotation opposite to the first rotation direction with the draw pole supported by the arcuate surface when the coupling ring is above the pintle hook in order to lower the coupling ring on the pintle hook and thereby engage the said ring with the said pintle hook; and whereby, in operation, said pivoting arm is rotated about said pivot with the free end of the arm supporting the draw pole in order to control in height the position of the pole, the second end and the first coupling member and thereby enable engagement of the said first coupling member with the second coupling member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification