US3049249A

US3049249A - Transporting and dumping equipment

Info

Publication number: US3049249A
Application number: US691259A
Authority: US
Inventors: George R Dempster; William A Herpich
Original assignee: Dempster Brothers Inc
Current assignee: Dempster Brothers Inc
Priority date: 1957-10-21
Filing date: 1957-10-21
Publication date: 1962-08-14
Anticipated expiration: 1979-08-14

Description

Aug. 14,1962 G. R. DEMPSTER ETAL 2 Sheets-Sheet 1 HHIIHHII g ATTORNEYS Aug. 14, 1962 G. R. DEMPSTER HAL 3,049,249

TRANSPORTING AND DUMPING EQUIPMENT Filed Oct. 21, 1957 2 Sheets-Sheet 2 M m R Y ATTORNEY$ United States Patent Ofihce 3,49,Z49 Patented Aug. 14, 1962 3,049,249 'IRANSPORTBNG AND DUMPING EQUIPMENT George R. Dempster and William A. Herpich, Knoxville, Tenn.; said Herpich assignor to Dempster Brothers, Inc., Knoxville, Tenn., a corporation of Tennessee Filed Oct. 21, 1957, Ser. No. 691,259 9 Claims. (Cl. 214-77) This invention relates to improvements in transporting and dumping equipment, and more particularly to the type of equipment set forth in the prior patent of George R. Dempster, No. 2,281,183, granted April 28, 1942.

Equipment of the type set forth in the aforesaid patent, as manufactured and used heretofore, comprises a hoisting unit upon which a container is adapted to be supported during transportation to a desired point for dumping. The hoisting unit comprises a frame having a bucket rest or support mounted thereon upon which the container is adapted to be seated during transportation. A boom is mounted on the frame and has means for attachment to the container for lifting the container onto the bucket rest or support. A carriage is also mounted on the frame of the hoisting unit against which the container may rest and be drawn up in moving to its supported and dumping positions.

The bucket rest or support for the container is usually so located on the hoisting frame as to dispose the center of gravity of the container and its contents substantially over the rear axle of the vehicle or just slightly forward of the rear axle where the major part of the load can be taken by the latter during transportation of the vehicle. Containers of standard or conventional sizes can be accornm odated on the bucket rests of hoisting units of standard sizes. However, for relatively lightweight materials extremely large or elongated containers are often desirable. If such containers, however, were used on conventional sized hoisting units, they would overhang the back end of the hoisting unit resulting in serious danger of falling off the vehicle during transportation or becoming over-balanced either during picking up or dumping. No adequate provision has been made heretofore for handling such abnormally large containers as is often desirable.

One object of this invention is to overcome the objections noted especially for abnormally large or long containers that may be accommodated on the hoisting unit on the vehicle chassis and will be retained in place thereon securely during transportation.

Another object of the invention is to provide lifting means that may be attached to containers of different sizes for imparting the proper lifting action thereto even when different sizes are involved, either standard size or abnormally large size, in a direction lengthwise of the vehicle.

Still another object of the invention is to provide for retaining of a container on the vehicle and for holding the container securely in place thereon, even though the container sits fiat on the vehicle.

These objects may be accomplished, according to one embodiment of the invention, by providing a hoisting unit having means for connection with a container for lifting the container to a seated position on the vehicle for transportation. It is not necessary that the container be seated upon inclined res-ts, but the container may sit flat on the vehicle and even when an abnormally long container is encountered in a direction lengthwise of the vehicle, the container can extend out beyond the rear end of the vehicle. Provision is made for securely anchoring the container in place against accidental displacement from its seated position on the vehicle.

It is preferred that the anchoring means be connected with the boom used to raise and lower the container, as,

for example, by means connected with the boom arms engaging the boom rests on the container rearwardly of the boom rests to anchor the container securely in its seated position on the vehicle. The boom may be held securely seated on the boom rests, as, for example, by using double-acting hoists connected therewith, which may be power operated in a downward direction, applying force to the boom to hold it in its lowered position during transportation of the container.

This embodiment of the invention is illustrated in the accompanying drawings, in which:

FIG. 1 is a side elevation of a hoisting unit, with one size of container supported in carrying position on the vehicle; and

FIG. 2 is a similar view, illustrating an enlarged container thereon.

The invention is illustrated as applied to a hoisting unit substantially of the character set forth in the aforesaid patent of George R. Dempster, No. 2,281,183, granted April 28, 1942. This hoisting unit is mounted on a truck chassis, the frame of which is indicated generally by the numeral 1, supported on wheels 2. The cab is shown at 3.

Mounted on the chassis frame 1 is a subframe 4 extending lengthwise of the vehicle in this embodiment of the invention. A boom is indicated at 5 comprising a pair of spaced arms on opposite sides of the chassis, pivotally supported at 6 on the subframe 4. The boom 5 is adapted to be raised and lowered with respect to the su-bframe 4 by hydraulic power devices generally indicated at 7. The hydraulic power devices 7 are preferably of the doubleacting type capable not only of lifting the boom 5 but also of imparting a downward movement and pressure thereto to hold the container in a carrying position, as hereinafter described.

The hydraulic power devices 7 are shown as displaced laterally outside the subframe 4 and connected at one end with the adjacent boom arm. At the opposite end, each of the hydraulic power devices 7 is pivotally connected at 8 with a stirrup bracket 9 secured rigidly to the subframe 4 and depending therefrom. This type of mounting is provided so as to locate the hydraulic power devices forwardly of the vehicle to the maximum extent and without requiring greater height to the boom than would be needed otherwise, especially in its raised position.

The subframe 4 includes a pair of support members spaced laterally on opposite sides of the chassis 1 so as to provide tracks on which a carriage 10 is mounted for movement forwardly and backwardly of the hoisting unit in the manner described more in detail in the aforesaid Dempster patent, No. 2,281,183. Usually, power means, such as a hydraulic power device, is employed for this purpose.

A container is shown at C in FIG. 1, this being a standard sized container which is normally seated on a bucket rest 11 provided on the upper surface of the subframe 4 when the carriage 10 is in its forwardmost position, as shown in full lines in FIG. 1. This bucket rest is shown as fiat and horizontal and may be provided by the top surfaces of the subtrame 4. The container will be accommodated in a position directly over the rear wheels 2 of the vehicle in its carrying position.

While any suitable or desired size and kind of container can be used, the one illustrated in the drawings is of a conventional drop bottom type in which the bottom of the container is hinged at the front wall thereof to the and projecting outwardly in opposite directions from the container adjacent the bail wall thereof.

Means is provided for connecting the boom 5 with the container so as to raise and lower the container. A flexible cable device 14 is preferably used for this purpose. At one end, the cable device 14 has a key plate 15 thereon provided with a slot 16 in the plate of a size to fit over the adjacent lifting pin 12 and to anchor the end of the flexible chain or cable device 14 to the lifting pin. The opposite end of the flexible cable device 14 is provided with a suitable connection, such as a stirrup or hanger pin 17 for attachment of the fiexible device to the boom arm 5.

In this embodiment of the invention, each arm of the boom 5 is provided with an elongated slot 18 in the outer end portion thereof, extending lengthwise of the arm. The slot 18 has offset opposite end portions forming seats 19 and 20. The stirrup or hanger pin 17 is shown in full lines in FIG. 1 as being engaged with the seat 19 at the inner end of the slot 18, which is a satisfactory position for the stirrup or hanger pin when a container of normal size is being handled, as illustrated in FIG. 1. However, when an abnormally large container is being used, as for example, that shown in FIG. 2, the stirrup or hanger pin 17 is shifted to the seat 20 at the opposite end of the slot 18 so as to provide a better lifting action on the container, as well as a better inward swinging action of the container to its seated position on the hoisting unit.

To prevent the container from sliding off the flat bucket rest 11 in its carrying position, as well as for anchoring an abnormally long container in place when the latter overhangs the rear end of the vehicle, as shown in FIG. 2, it is preferred that some means be provided for locking the container securely in place. In this embodiment of the invention, a safety lock is provided on the boom 5 at each opposite end of the container in position for cooperative locking engagement with the boom rests 13. The lock is illustrated generally by the numeral 21 in the form of fingers projecting downwardly from a mounting plate 22 secured by screws or other fastenings to the bottom face of each arm of the boom 5. The safety lock device should be adjustable lengthwise of the boom 5 as by means of slots therein or spaced openings for the fastening devices. The fingers 21 are adapted to fit over rearwardly of the boom rests 13 when the boom is in its low-' ered position, either entirely rearwardly thereof, as shown in FIG. 1, or embracing the boom rests, as shown in FIG. 2.

The enlarged container illustrated in FIG. 2 is designated generally at C, which is constructed substantially the same as the standard container shown in FIG. 1, except as to size. Due to the greater overall length of the container C in a direction lengthwise of the vehicle, the container C overhangs the rear end of the vehicle in its carrying position of the bucket rest 11. However, the safety lock described will be effective to hold the container in place thereon, especially when downward pressure is imparted to the boom 5 by the double-acting power devices 7 connected with the boom.

This construction makes it possible for the hoisting unit to handle containers of greater front-toback dimension than could be handled with hoisting units of the character employed heretofore. Moreover, the use of a flat bucket rest keeps the overall height of the unit down to .a minimum in traveling position. The flat bucket rests are practical where the container is locked securely in place, as, for example, by the safety lock 21 held in engagement with the container by the double-acting hoists.

The use and operation of the equipment in picking up, transporting and dumping the container will be apparent from the foregoing description and are substantially the sameas described in the aforesaid Dempster patent, No. 2,281,183. Suitable means should be provided also to effect dumping when the equipment reaches the desired point for that purpose.

While the invention has been illustrated and described in one embodiment, it is recognized that other variations and changes may be made therein without departing from the invention, as set forth in the claims.

We claim:

1. In transporting equipment adapted to be mounted on a vehicle chassis at the rear end thereof, the combination with a container having outward projections on the ends thereof, of means forming a substantially flat horizontal bucket rest adapted toreceive the container thereon, means for lifting the container to a seated position on the bucket rest, and means on the lifting means in overlapping relation with the projections on the container for anchoring engagement with the container to prevent displacement of the container from the bucket rest.

2. In transporting equipment, the combination with a vehicle chassis, of a hoisting unit mounted on the chassis and having a bucket rest thereon adapted to receive a container, a boom mounted on the hoisting unit and having means connected therewith for engaging the container to lift the container to a seated position on the bucket rest, and anchor means connected with the boom in position to overlap rearwardly a portion of the container to hold the container in place on the bucket rest during transportation.

3. In transporting equipment, the combination with a vehicle chassis, of a hoisting unit mounted on the vehicle chassis and having a bucket rest thereon at the rear end of the chassis, a boom mounted on the hoisting unit, a container seated on the bucket rest, means forming a connection between the container and the boom for raising and lowering the container with respect to the bucket rest, said container having projections on opposite ends thereof externally of opposite ends of the container, and anchor means connected with the boom and extending downwardly in a rearward overlapping relation with said projections externally of opposite ends of the container for securing the container on the bucket rest.

4. In transporting equipment, the combination with a.

unit, a container seated on the bucket rest, means forming a connection between the container and the boom for raising and lowering the container with respect to the bucket rest, said container having projections on opposite ends thereof externally of the container, anchor means connected with the boom andextending downwardly in rearward overlap relation with said projections externally of the container for securing the container on the bucket rest, and means for imparting downward pressure to the boom to hold said anchor means in locking engagement with said projections.

5. In transporting equipment adapted to be mounted on a vehicle chassis at the rear end thereof, the combination with a container, of means forming a bucket rest for receiving the container in a seated position thereon, a lifting device mounted for raising and lowering movement relative to the chassis and having means for connection with the container for lifting the container onto the bucket rest, means on the lifting device for positive locking engagement with the container upon downward movement of said lifting device relative thereto, and power means connected with the lifting device for causing said downward movement thereof.

6. In transporting equipment adapted to be mounted on a vehicle chassis at the rear end thereof, the combination with a container, of means forming a bucket rest for receiving the container in a seated position thereon, a lifting device mounted for raising and lowering movement relative to the chassis and having means for connection with the container for lifting the container onto the bucket rest, means on the lifting device for positive locking engagement with the container upon downward movement of said lifting device relative thereto, and a double-acting power cylinder connected with the lifting device for raising said device and for causing said downward locking engagement of the locking means with the container.

7. In transporting equipment, the combination with a vehicle chassis, of a hoisting unit mounted on the chassis and having a substantially flat bucket rest thereon, a container seated on the bucket rest and having boom rests projecting lengthwise fiom opposite ends thereof, a boom mounted on the hoisting unit and having means connected therewith for raising and lowering the container with respect to the bucket rest, a mounting plate secured to the underside of the boom at each end of the container, and fingers fixed to the mounting plate and extending downwardly therefrom, said fingers being spaced apart a distance greater than the Width of the boom rest and in embracing relation with the latter.

8. In transporting equipment adapted to be mounted on a vehicle chassis at the rear end thereof, the combination with a container having outward projections on the ends thereof, of means forming a bucket rest adapted to receive the container thereon, means for lifting the container to a seated position on the bucket rest, and means on the lifting means in overlapping relation with the projections on the container for anchoring engage- 6 ment with the container to prevent displacement of the container from the bucket rest.

9. In transporting equipment, the combination with a vehicle chassis, of a hoisting unit mounted on the chassis and having a bucket rest thereon, a container seated on the bucket rest and having boom rests projecting lengthwise from opposite ends thereof, a boom mounted on the hoisting unit and having means connected therewith for raising and lowering the container with respect to the bucket rest, a mounting plate secured to the underside of the boom at each end of the container, and fingers fixed to the mounting plate and extending downwardly therefrom, said fingers being spaced apart a distance greater than the width of the boom rest and in embracing relation with the latter.

References Cited in the file of this patent UNITED STATES PATENTS 1,742,735 Struppel Ian. 7, 1930 1,975,094 Fitch Oct. 2, 1934 2,179,779 Dempster Nov. 14, 1939 2,313,514 Brooks Mar. 9, 1943 2,329,439 Hanssen Sept. 14, 1943 2,502,108 Taylor Mar. 28, 1950 2,772,919 Jones Dec. 4, 1956