US 2496401 A
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TRUCK CRANE Film June '7, 1946 INVENTOR. WA LTE R Mc KINNEY a aw Patented Feb. 7, 1950 UNITED STATES PATENT OFFICE 1 Claim.
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 I 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 drivers cab.
The base plate I0 is provided with a centrally located hole therein.
The crane has a main vertically extending mast II consisting of a pipe. In the lower end of this pipe a plug I2 is inserted and is securely held in place by a bolt I3 extending diametrically through the pipe I l and the plug l2. A king pin I4 is integrally formed with and extends coaxially with and downwardly from the plug i2.
A similar plug 15 is inserted into the upper end of the main mast H and is secured thereto by a bolt l6 extending diametrically through the pipe H and the upper plug l5. A king pin 17 is formed integrally and coaxially with the upper plug l and extends upwardl therefrom.
A bearing plate l8 has a centrally located hole therein and the upper king pin extends rotatably through this hole, when the bearing plate is placed in position so that it rests on the upper surface of the upper plug I 5. Two guy wires I9 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 2| is fastened with its upper end onto the bearing plate H3 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 I4 is arranged rotatably in the center hole in the base plate III. In this manner the main mast l l is rotatably secured in vertical position on the truck.
Two flat gib bars 23 are rigidly connected with the pipe ll adjacent its upper end, for instance by welding, so that they extend at right angles to 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 I 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 I I a bracket 26 is rigidly fastened onto the rear side of said mast and a winch 21 is supported on said bracket. To stiffen the support of the winch 21 a pair of angularly downwardly extending braces 28 is fastened to the Winch and the mast.
The pinch ma 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-01f (not shown).
A cable 30 attached to the winch drum 3| leads 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 H intermediate its ends.
A second sheave 36 is rotatably mounted on a pin 37 extending through the wall of the mast H. The sheave 36 extends through a slot in the rear side of the mast H and a third sheave 38 is rotatably mounted on a pin 39 in the wall 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 H and the shaft 31 is arranged somewhat below said pin.
Another pin 40 extends through the two gib bars 23 adjacent their free ends and supports a fourth sheave ll 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 ll respectively. The free end of th 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 th 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.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 193,824 Locke Aug. 7, 1877 249,413 Soseman et al Nov. 8, 1881 426,681 Pless Apr. 29, 1890 822,152 Raymond May 29, 1906 1,423,376 Watts July 18, 1922 1,423,377 Watts July 18, 1922 1,540,135 Klinkhammer June 2, 1925 1,860,774 Erickson May 31,1932 2,109,304 Ormsby Feb. 22, 1938 2,301,555 Mantyla Nov. 10, 1942