# US 5,348,332 A · Pup trailer dolly back-up direction guide

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- Number: US 5,348,332 A
- Document ID: US5348332A
- Status: Granted
- Kind: A
- Application number: 08/074,649
- Filed: 1993-06-11
- Granted: 1994-09-20
- Earliest claimed: 1993-06-11
- Inventors: David Hamilton
- Web page: https://patentgrep.com/patent/US5348332A

## CPC

- B62D 53/0864: {Dollies for fifth wheel coupling}
- B60D 1/18: Tow ropes, chains or the like
- B60D 3/00: Fittings to facilitate pushing
- B62D 13/06: for backing a normally drawn trailer
- Y10S 280/14: Tractor-trailer backing connections
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)
- B60D: VEHICLE CONNECTIONS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A back-up direction guide for a pup trailer dolly having a frame sprung from a wheel equipped axle and connected to the rearward end of a truck-trailer by an A-frame tongue portion is formed by a rigid plate clamped in overlying relation to the forward end portion of the pup trailer dolly frame. Load binders are pivotally connected with the respective ends of the plate and tensioned flexible members connected with the respective load binder and the respective outer lower limit of the rearward end portion of the truck-trailer guide the pup trailer dolly in a selected direction during rearward backing movement of the truck-trailer.

## Claims

### Claim 1

A backup direction guide for a pup trailer dolly having a horizontal frame having side beams sprung from a wheel equipped axle having a semitrailer supporting fifth wheel and having a forward end portion characterized by an A-frame pintle hook equipped tongue connected with a towing vehicle, the improvement comprising: means for temporarily connecting said pup trailer dolly against any lateral movement relative to said towing vehicle, said means including:
an elongated rigid plate transversely overlying and projecting laterally outward from a forward end of said frame side beams;
clamp jaws cooperating with said plate for gripping intermediate portions of said frame side beams;
an L-shaped member underlying and cooperatively secured to each end portion of said plate for forming an outwardly open slot having a side wall and a bottom wall;
a load binder secured to each bottom wall of the respective slot; and,
an elongated flexible member tautly extending between each load binder and a respective rearward lowermost lateral limit of a pup trailer dolly towing vehicle.

### Claim 2

A backup direction guide for a pup trailer dolly having a horizontal frame having side beams sprung from a wheel equipped axle having a semitrailer supporting fifth wheel and having a forward end portion characterized by an A-frame pintle hook equipped tongue connected with a towing vehicle, the improvement comprising: means for temporarily connecting said pup trailer dolly against any lateral movement relative to said towing vehicle, said means including:
clamp means including a rigid member secured to and projecting laterally outward from opposing sides of said frame forward end portion;
load binders secured to said clamp means on opposing sides of said frame;
elongated flexible members tautly extending between each load binder and a respective rearward lower most lateral limit of a pup trailer dolly towing vehicle
the clamp means including an elongated plate transversely overlying said frame, and clamp jaws cooperatively secured to said plate for gripping intermediate portions of said frame side beams; and said plate characterized by a laterally open slot having parallel opposing side walls at its respective end portions for respectively pivotally supporting said load binders.

### Claim 3

A backup direction guide for a pup trailer dolly having a horizontal frame having side beams sprung from a wheel equipped axle having a semitrailer supporting fifth wheel and having a forward end portion characterized by an A-frame pintle hook equipped tongue connected with a towing vehicle, the improvement comprising: means for temporarily connecting said pup trailer dolly against any lateral movement relative to said towing vehicle, said means including:
a pair of toggle link means each of said pair including pivotally interconnected links secured to and projecting laterally outward and forward from opposing forward sides of said frame;
a respective handle for pivoting said links; and,
elongated flexible members tautly extending between each toggle link means and a respective rearward lowermost lateral limit of a pup trailer dolly towing vehicle.