US1489161A - Portable crane - Google Patents

Description

April 1, 1924. 1,439,161

O. SCHUCHERT PORTABLE CRANE Filed July 10,. 1922 2 Sheets-Sheet 1 April i 1924. 1,489,161v

K o. scHUcHERT PORTABLE CRANE Filed July 1o, 1922 2 sheets-.sheet s Patented Apr. l, 1.924.

UNITED STATES PATENT OFFICE.

OAKEY SCHUCHERT, 0F MINNEAPOLIS, MDTNESOTA, ASSIGNOR 0F ONE-HALF T0 RALPH SCHUCHERT, OF MINNEAPOLIS, MINNESOTA.

PORTABLE application mea my 1o, 1922. serial No. 573,904.

To all lwhom t may concern."

Be it known that I, OAKEY SCHUCHER'T,

' a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Portable Cranes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others I skilled in the art to which it appertains to make and use the same.

My invention provides an extremely simple and highly efficient so-called portable auto crane, which, while capable ofmorc general use, has been particularly designed and is especially serviceable for use in lifting certaln parts of an automobile, motor truck, or like, vehicle, for the purpose of making repairs.

Generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and deined in the claims.

rlhe improved crane, in its commercial form, comprises a framework mounted on wheels, a pedestal rising therefrom, primary and secondary lifting booms and a windlass connection between the two booms, said parts being combined in a novel manner hereinafter more fully described.

1n the accompanying drawings, which illustrate the improved crane, like characters indicate like parts tlflroughoutl the several views. I

Referring to the drawings:

Fig. 1 is a side elevation of the crane, parts of an auto truck or like motor vehicle being indicated by dotted lines;

Fig. 2 is a horizontal section taken on the irregular line 2 2 of Fig. 1, the boomoperating devices being removed; and

Fig. 3 is a transverse section on the line 3-3 of Fig. 2.

The framework 4 of the crane is a rectangular structure, the side beams of which are unconnected at the front ends, so as to form a bifurcated frame adapted to straddle automobile wheels or the like.

Rigidly secured to and rising from the frame 4 is a trussed mast 5. Said frame 4 is preferably mounted on caster wheels 6. A heavy primary boom 8 is made up of suitably crossconnected bars or members intermediately pivoted to the top of the mast 5, preferably by brackets 9 and 10, respectively, on the 17, is anchored at 18 to a brace 5 for the' mast 5, is passed over the sheave 16 and thence downward and attached to a windlass drum 19, the shaft 2O of which is journaled in suitable bearings on the brace 5 and is provided with a spur gear 21. The spur ear 21 meshes with a spur pinion 22, the

shaft 23 of which is journaled in bearings on the brace 5 and is provided with an operating frame 24. The numeral 25 indicates a retaining dog pivoted to a part of the brace 5 and engageable with the ear 21 to lock the drum 19 in any desire position against unwinding of the chain 17.

A cable-guiding sheave 26 is journaled on the pin 13 and over this sheave is passed a cable in the form of a chain 27, which, at its freeJ end, is provided with a hook 23 detachably engaged with the pin 14. The chain 27 is passed over an intermediate guide sheave 29 journaled on the pivot pin 11. vlhe lower end of said chain 27 is attached to a windlass drum 30, the shaft 31 of which is journaled in suitable bearings on the mast 5 and is provided with a spur gear 32. The spur gear 32 is in mesh with a spur pinion 33, the shaft 34 of which 4is journaled on the mast 5 and is provided with an operating crank 35. rllfne numeral 36 indicates a retaining dog pivoted to the mast and engageable with the gear 32 to lock the drum 30 in any desired position against the unwinding movements of the cable 27. Suspended on the downwardly looped portion of the chain 2'? 1s a tackle block pulley 37, the shaft of which supports a grapple hook 38.

Pivoted to the lower portion of the mast and located below the main boom 8 is a secondary boom, preferably made up of laterally spaced metal bars 39 and a two-pronged extension, which latter is preferably made of a fiat steel bar bent upon itself to form, first, parallel horizontal portions 40, second, parallel vertical portions 40a and, third, a horizontal looped portion 40", which latter,

ica

as shown, supports a cross pin 41, in which may be hung lifting loops 42 or the like. To make this secondary boom extensible, the

v bars 39 are formed with longitudinal perforations 43 and the bar portions 40 are adjustably pivoted to the said bars 39 by a nut-equippedbolt or rod 44 passed through perforatlons in the end of said members 40 and through any one of the perforations 43. Downward movement of the extension member of the secondary boom, in respect to the bars 39, is limited by stop brackets 45 rigidly secured to the ends of the bars 39 and underlying said members 40, leaving the latter free for vertical movements.

A lifting yoke 46 is adjustably connected to the bars 39 of the secondary boom by means of a rod 47 passed through any of the perforations 43 and through perforations in the lower ends of said yoke. When the extension member of the secondary boom is in the position shown in Fig. 1, the bar members 40 will hold the bolt 47 against endwise displacement, but when said bar portions 40 are moved upward on the pivot 44, said rod 47 may be moved from one position to V another in the perforation 43.

The crane described may be used in a great many different ways in repairing automobiles, trucks and other motor-propelled vehicles and for doin illustrates the use of t e secondary boom to pick up the differential of the truck and to lift the same out of its casing, and here it will be noted that the primary boom projects above the truck body while the secondary boom projects under the truck body and has its end 40b positioned between the differential and the truck body with the links 42 connected to small lugs or pins, such as customarilyfound on differentials of the above character. Of course, any other suitable form of grapple may be used to connect the differential to the boom. In the said adjustment shown in Fig. 1, the primary boom 8 becomes a relatively fixed support for the secondary boom 39-40, but the latter may be raised and lowered either by winding up or letting out the chain 27 or by windi up or letting out the chain 17. When the c ain 27 alone is manipulated, only the secondary boom will be moved, but when the chain 17 alone is manipulated, both of the booms will be simultaneously moved. Of course, the farther the sheave 37 is adjusted away from the pivots of the primary and secondary booms, the less will be the strain on the chain 27 .and on the secondary boom and this is important in lifting very heavy loads. By adjusting the bolts 13 and 14 in the bolt holes 12 of the boom 8 and by adjusting the pin 47 in the holes 43 of the seconda-ry boom, the sheave 37 and grapple hook 38 may be set forwardly or rearwardly to suit the condition of any particular operation.

like work. Fig. l'

The main boom 8 may be extended over the to of any ordinary vehicle to lift any part t ereof, or it may be extended under certain parts of the vehicle, such as under the body thereof where the latter is .to be lifted off from its chassis. In the case of a dumping motor vehicle, when the box is tilted, the main boom may be extended under the tilting box and attached to any of the mechanism below the box. In fact, with the primary and secondary booms 'connected and operated as described, substantially any art of the motor truck or vehicle may be li ted.

The device is" generally eiiicient as a crane `for use in or about automobiles or like places,

but is capable of more general use.

Vliat I claim is:

1. A crane of the kind described comprising a base, a mast rising therefrom, a boom pivoted to said mast, cable-anchoring and guiding devices on said boom, a cable attached to said anchor and running over said guide, a windlass for winding up and letting out said cable, a floating sheave mounted on the portion of said cable that is looped lbetween said cable anchor and cable guide,

a secondary boom pivoted to said mast, and a grapple supporting the secondaryboom from said sheave.

2. A crane of the kind described comprising a base, a mast, horizontally disposed main and secondary booms vertically s aced, the one above the other, and means or independently operating said booms, which supports the secondary boom from the main boom.

3. In a crane of the kind described, the combination with a base and a mast rising therefrom, of a rimary boom intermediately `pivoted to tlhe upper portion of said mast, a secondary boom pivoted to said mast below said primary boom, a cable and cooperating drum operative to raise vand lower said primary boom, and a cable and co-operating drum operative to raise and lower said secondary boom, said latter noted cable being anchored to said primary boom, and the latter having guides over which said latter noted cable passes.

4, In a crane of the kind described, the combination with a base and a mast, of a primary boom applied to and projecting from the upper portion of said mast, a secondary boom located below said primary boom and also pivoted to said mast, a cable anchored to said primary mast, the latter having guide sheaves over which said cable v 6. In a crane of the kind described, the `combination with a mast and a primary boom projecting from the up er portion thereof, a secondary boom located below said l primary boom and pivoted to said mast, means supported from the primary 'boom and operative to raise and lower said secondary boom.

7. The structure defined in claim 6 in which said secondary boom is provided with a longitudinally adjustable outer end portion that extends rst horizontally and then vertically and then terminates in an approximately horizontal portion.

In testimony whereof I aiX my signature.

OAKEY SCHUCHERT.

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