Title:
Truck crane
United States Patent 2496401


Abstract:
My invention relates to cranes and more particularly to truck cranes. The object of my invention is to provide a crane adapted to be rotatably supported by a truck or the like, to serve the purpose of loading and unloading the truck. Another object of my invention is to provide a truck crane...



Inventors:
Walter, Mckinney
Application Number:
US67506046A
Publication Date:
02/07/1950
Filing Date:
06/07/1946
Assignee:
Walter, Mckinney
Primary Class:
Other Classes:
212/252
International Classes:
B66C23/36
View Patent Images:
US Patent References:
2301555Truck hoist1942-11-10
2109304Crane1938-02-22
1860774Geared hoist for use with farm tractors1932-05-31
1540135Truck hoist1925-06-02
1423377Mast top1922-07-18
1423376Derrick1922-07-18
0822152N/A1906-05-29
0426681N/A1890-04-29
0249413N/A1881-11-08
0193824N/A1877-08-07



Description:

My invention relates to cranes and more particularly to truck cranes.

The object of my invention is to provide a crane adapted to be rotatably supported by a truck or the like, to serve the purpose of loading and unloading the truck.

Another object of my invention is to provide a truck crane adapted to be equipped either with a manually operable or a power driven winch.

Other objects of my invention may appear in the following specification describing my invention with reference to the accompanying drawing illustrating a preferred embodiment of my invention.

It is, however, to be understood that my invention is not to be limited and restricted to the exact construction and combination of parts described in the specification and shown in the drawing, but that such changes and modifications can be made, which fall within the scope of the claim appended hereto.

In the drawing Fig. 1 is a side elevation of a crane according to my invention, a fragmentary side elevation of a truck, on which the crane is erected, being shown in broken lines, and Fig. 2 is a top plan view of Fig. 1.

Referring now to the drawing in detail, the crane according to my invention is fastened to the beams of the chassis of the truck, to which the crane is attached. To accomplish this a base plate 10 is rigidly attached to the chassis of the truck and is preferably located as near as possible to one side of the truck and right behind the driver's cab.

The base plate 10 is provided with a centrally located hole therein.

The crane has a main vertically extending mast I consisting of a pipe. In the lower end of this pipe a plug 12 is inserted and is securely held in place by a bolt 13 extending diametrically through the pipe I I and the plug 12. A king pin 14 is integrally formed with and extends co- 4 axially with and downwardly from the plug 12.

A similar plug 15 is inserted into the upper end of the main mast I I and is secured thereto by a bolt 16 extending diametrically through the pipe II and the upper plug 15. A king pin !7 51 is formed integrally and coaxially with the upper plug 15 and extends upwardly therefrom.

A bearing plate 18 has a centrally located hole therein and the upper king pin extends rotatably through this hole, when the bearing 6! plate is placed in position so that it rests on the upper surface of the upper plug 15. Two guy wires 19 are fastened diametrically opposite to each other onto the bearing plate 18 with their upper ends, and the lower ends of these guy braces are fastened onto the truck as indicated at 20 in Fig. 2. A third guy brace 21 is fastened with its upper end onto the bearing plate 18 at a point located 90° from the upper ends of the guy wires 19 and extends forwardly and downwardly and is firmly secured with its lower end to the front bumper 22 of the truck.

The lower king pin 14 is arranged rotatably in the center hole in the base plate 10. In this 1manner the main mast I I is rotatably secured in vertical position on the truck.

Two flat gib bars 23 are rigidly connected with the pipe 11 adjacent its upper end, for instance by welding, so that they extend at right angles to o the pipe in a rearward direction therefrom.

These two gib bars 23 are spaced apart from each other and a spacer bar 24 is set between the free ends of the two bars and welded in place.

A brace 25 extends angularly between the mast SI and the horizontal gib bars 23 and is welded to the bars and to the pipe to stiffen and reinforce the gib bars.

Adjacent the lower end of the mast II a brackSet 26 is rigidly fastened onto the rear side of said mast and a winch 27 is supported on said bracket. To stiffen the support of the winch 27 a pair of angularly downwardly extending braces 28 is fastened to the winch and the mast.

The pinch may be manually operated by means of a crank (not shown) or it may be driven by the motor of the truck over a flexible shaft 29 connected to a power take-off (not shown).

A cable 30 attached to the winch drum 31 leads 0 upwardly and is trained over a sheave 32 rotatably supported on a shaft 33, which extends through the side members 34 of a U-shaped bracket 35 rigidly mounted on the rear side of the mast I I intermediate its ends.

5 A second sheave 36 is rotatably mounted on a pin 37 extending through the wall of the mast II. The sheave 36 extends through a slot in the rear side of the mast II and a third sheave 38 is rotatably mounted on a pin 39 in the wall 0 of the mast II and extends through a slot provided in the front of the said wall.

The pin 39 is located adjacent the upper end of the mast I'l and the shaft 37 is arranged somewhat below said pin.

5 Another pin 40 extends through the two gib bars 23 adjacent their free ends and supports a fourth sheave 41 rotatably between said bars and a fifth sheave 42 is rotatably mounted between the bars 23 on a shaft 43 extending through them adjacent the mast II. The cable 30 is trained over the lower sheave 36, the upper sheave 38 in the mast and the two gib sheaves 42 and 41 respectively. The free end of the cable hangs down from the last named sheave and is provided with a lifting hook 44 or the like.

The above description shows clearly how a crane according to my invention can be attached easily to any kind of truck and can be used for placing loads on or removing them from the truck. Having described my invention, I claim as new and desire to secure by Letters Patent: A crane comprising a support including a vertically-disposed pipe having its lower end adapted to be rotatably supported upon the frame of a truck, a plug positioned within the upper end of said pipe and detachably secured to the latter, a kingpin positioned in said plug and having an end projecting from the latter, a bearing plate mounted on said plug, said bearing plate having an aperture positioned centrally thereof for slidably receiving the projecting end of said kingpin, means carried by said plate and adapted to be detachably secured to said truck for bracing said pipe in a vertical position, a pair of gib bars arranged in parallel spaced relation with respect to each other and fixedly secured adjacent one end thereof to the upper end of said pipe, means for supporting said gib bars at substantially right angles to said pipe, a rotatable winch having a cable wound thereon positioned intermediate the ends of said pipe and fixedly secured to the latter, a first rotatable sheave disposed between said gib bars adjacent said one end thereof for rotatably supporting said cable, and a second rotatable sheave disposed between said gib bars adjacent said other end thereof for rotatably supporting said cable.

WALTER McKINNEY.

REFERENCES CITED The following references are of record in the file of this patent: UNITED STATES PATENTS Number 193,824 249,413 426,681 822,152 1,423,376 1,423,377 1,540,135 1,860,774 2,109,304 2,301,555 Name Date Locke ------------- Aug. 7, 1877 Soseman et al. ------ Nov. 8, 1881 Pless ------------- Apr. 29, 1890 Raymond ---------- May 29, 1906 Watts ------------- July 18, 1922 Watts ------------- July 18, 1922 Klinkhammer ------ June 2, 1925 Erickson ---------- May 31,1932 Ormsby ----------- Feb. 22, 1938 Mantyla ----------- Nov. 10, 1942