# US 4,398,859 A · Trailers

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- Number: US 4,398,859 A
- Document ID: US4398859A
- Status: Granted
- Kind: A
- Application number: 06/127,570
- Filed: 1980-03-06
- Granted: 1983-08-16
- Earliest claimed: 1980-03-06
- Inventors: Robert Ball
- Web page: https://patentgrep.com/patent/US4398859A

## CPC

- B60P 1/36: using endless chains or belts thereon
- B60P: VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS (vehicles with special provisions for transporting patients or disabled persons, or their personal conveyances A61G3/00)

## Abstract

A vehicle or trailer having a chassis to which is pivotally connected an elevator or conveyor, the elevator or conveyor being movable from a position in which the elevator or conveyor extends transversely of the longitudinal axis of the vehicle or trailer from one side thereof to a position in which the elevator or conveyor is substantially parallel to the axis of the vehicle or trailer and lies within the overall confines thereof.

## Claims

### Claim 1

A vehicle or trailer which is adapted to be connected to a towing vehicle comprising a chassis having at least one pair of wheels rotatably mounted thereon; a main load-carrying platform mounted on the chassis; a secondary platform disposed at a lower level than the main load-carrying platform and a pivotally mounted elevator, the elevator being pivotally movable from an operative position in which the elevator extends transversely of the longitudinal axis of the vehicle or trailer from one side thereof to an out of use position in which the elevator extends substantially parallel to the longitudinal axis of the vehicle or trailer and said elevator further being disposed below the main load-carrying platform in the out of use position.

### Claim 2 (depends on 1)

A vehicle or trailer according to claim 1, wherein the elevator lies within the overall confines of the vehicle or trailer in the out of use position.

### Claim 3 (depends on 1)

A vehicle or trailer according to claim 1, wherein the elevator is pivotally connected to one end of a pivot arm and the other end of the pivot arm is pivotally connected to the chassis.

### Claim 4 (depends on 1)

A vehicle or trailer according to claim 1, wherein the inner end of the elevator extends inwardly of the vehicle or trailer from the side edge towards the longitudinal center line thereof.

### Claim 5 (depends on 1)

A vehicle or trailer according to claim 1, wherein the inner end of the elevator is provided with releasable engaging means for connecting said inner end to the chassis in the operative position thereof.

### Claim 6 (depends on 1)

A vehicle or trailer according to claim 1, wherein at least one support strut is provided which is adapted to be connected between the elevator and the chassis to support the elevator in the operative position on the vehicle or trailer.

### Claim 7 (depends on 1)

A vehicle or trailer according to claim 1, wherein the elevator is provided at each side edge with side boards which are each pivotally connected to the elevator so as to be capable of being folded downwardly onto the upper face of the elevator when the elevator is moved to the out of use position.

### Claim 8 (depends on 1)

A vehicle or trailer according to claim 1, wherein the elevator has an endless belt driven by a hydraulic motor.

### Claim 9 (depends on 8)

A vehicle or trailer according to claim 8, wherein the fluid under pressure for operating the motor is supplied from a hydraulic system of the towing vehicle.

### Claim 10 (depends on 1)

A vehicle or trailer according to claim 1, wherein the secondary platform which is disposed at a lower level than the main load-carrying platform is provided at the rear end of the main load-carrying platform.

### Claim 11 (depends on 1)

A vehicle or trailer according to claim 1, wherein upwardly extending members are provided at the side edges which members support a roof extending over the main and secondary platforms.