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| Number | Title | Issue Date |
| 4040006 | Jacknife warning system A warning system designed to be interconnected between a towing vehicle such as a conventional automobile and a trailer or like device comprising a towed vehicle wherein the warning system includes a circuit defined by electrically connected elements. Suc... | 08/02/1977 |
| 4003586 | Sway resisting structure for trailers In a combination including a towing vehicle equipped with a ball type tow hitch and a trailer equipped with a forwardly projecting tongue portion having a socket type tow hitch mounted on its forward end removably universally coupled to the ball type tow ... | 01/18/1977 |
| 3995877 | Fifth wheel An improved fifth wheel for a tractor-trailer rig, characterized by a first subassembly including a wear plate adapted to be mounted on a downwardly facing surface of a trailer and having a king pin projected normally therefrom, and a second subassembly a... | 12/07/1976 |
| 3994510 | Trailer coupling means The disclosure relates to a means of coupling a trailer to an automobile comprising a self-aligning and shock-absorbing coupling means. The coupling means uses a fifth wheel and spring-loaded roller-detent means to maintain alignment in yaw between the ve... | 11/30/1976 |
| 3993362 | Anti-jackknifing and skidding control system An anti-jackknifing and skidding control system for trailer trucks is described, wherein a linear accelerometer located on the rear of the trailer detects left or right skidding and provides automatic differential braking action to the left or right wheel... | 11/23/1976 |
| 3989268 | Anti-jack knife system for trailer trucks An anti-jack-knifing safety device for use on tractors and trailers operating on the highways and streets. It includes a gear rack mounted on the front end of the trailer, and secured against rotation thereon, and a second gear rack mounted on the rear en... | 11/02/1976 |
| 3985369 | Protective cover for an anti-jack knife device In an anti jack-knifing coupling arrangement between a tractor vehicle and a trailer wherein a turntable is mounted on the tractor vehicle for rotation about a vertical axis and carries a brake member for rotation therewith and having opposing horizontal ... | 10/12/1976 |
| 3972542 | Trailer anti-jackknifing apparatus Anti-jackknifing apparatus for combination with conventional tractor-drawn trailers wherein the tractor includes a forwardly disposed operator's cab and a rearwardly disposed fifth wheel assembly having a skid-plate. The skid-plate conventionally includes... | 08/03/1976 |
| 3963265 | Anti-jackknife mechanism Anti-jackknife mechanism for a fifth wheel coupler between a towing tractor and a towed trailer, including a vertically shiftable stop member engageable with abutment elements on opposite sides of the coupler kingpin, the stop member being tripped into op... | 06/15/1976 |
| 3955652 | Operating systems for trailer brakes An operating system for trailer brakes, where the pull and pressure on the coupling unit between the tractor and trailer vehicles are utilized to control the braking power of the trailer by sensing the pull and pressure on the coupling unit and regulating... | 05/11/1976 |
| 3950011 | Trailer truck A trailer truck comprising a trailer mounted at its front on the rear of a chassis frame of a tractor and energy absorbing system located between the chassis frame and a coupler of the trailer and adapted to allow an upward or forward movement of the coup... | 04/13/1976 |
| 3948567 | Sway control means for a trailer A sway control apparatus for use in a tow vehicle trailer braking system that provides a brake applying servomotor in the trailer with an independent actuation signal to attenuate oscillary forces which may develop between the trailer and the tow vehicle.... | 04/06/1976 |
