US2867333A - Hoisting crane - Google Patents

Description

Jan. 6, 1959 Filed July 1'7, 1956 A. D. DE SHANO HOISTING CRANE 5 Sheets-Sheet 1 IN V EN TOR.

AL PHO/VSE 0. De SHA/VO Jam 6, 1959 A. D. DE SHANO 2,357,333

HOISTING CRANE Filed July 1'7, 1956 3 Sheets-Sheet 2 /40 INVEN TOR.

l4 ALPHO/VSE D. De SHA/VO Jan. 6, 1959 A. D. DE SHANO HOISTING CRANE Filed July 17, 1956 IN V EN TOR. AL PHO/VSE D. DeSHA/VO United States Patent HOISTING CRANE Alphonse D. De Shane, Hamilton, Ohio, assignor to Emmett Conrad, Falmouth, Ky.

Application July 17,, 1956, Serial 'No. 598,378

1 Claim. (Cl. 212 9-144) This invention relates to improvements in a hoisting crane.

ease and dispatch, and moved over an extensive area about a platform upon which the crane is mounted.

Another object of the invention is to provide a beam extender for a crane, which may easily and quickly be attached to the crame beam when needed, or removed therefrom when not needed, the transposition being accomplished with a minimum expenditure of time and labor.

A further object is theproduction of a crane beam extender which is simple to construct and inexpensive to manufacture.

Another object of the invention is to provide for unusual flexibility and versatility in the handling of loads by a crane, thereby to effect substantial savings of time and labor, and in many instances eliminating the need for utilizing cranes of different capacities in the performance of a given job.

A further object is to provide improvements in the means for stabilizing and latching the rotational standard of a crane relative to its stationary base, for achieving the, utmost in safety and convenience of operation ofthe crane.

The foregoing and other objects are attained by the means described herein and illustrated upon the accompanying drawings, in which:

Fig. l is a side elevational view of a crane embodying the improvements of the present invention, the beam and extender being shown at various elevations.

Fig. 2 i an enlarged cross-sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is an enlarged cross-sectional view taken on line 33 of Fig. 1.

Fig. 4 is an enlarged cross-sectional view taken on line 4-4 of Fig. 1.

Fig. 5 is a cross-sectional view taken horizontally through the crane standardor post a short distance above the base, part being broken away in the interest of clarity of disclosure.

Fig. 6 is a fragmentary cross-sectional view taken on line 66 of Fig.5,

Fig. 7 is a cross-sectional view taken on line 7,7 of Fig. 5. I

Fig. 8 is a side elevational view similar to Fig. 1, showing a modified form of beam extender.

Fig. 9 is an enlargedcross-sectional view taken online 99 of Fig. 8.

Fig. 10 is an enlarged cross-sectional view taken on line 10.'10 of Fig. 8.

The crane hereindisclosed-is of the general type depicted-in my copending patent application Serial No.

An object of the invention is to provide a beam ex-- tender for a crane, whereby a load may be lifted with 574,034, filed March 26, 1956 and entitled Lift Attachment for Hoisting Cranes. In various phases'of the work of hoisting and'transporting trees, bushes, and in fact any objectfit is often desirable to extend the reach of the crane and thereby enhance its; versatility, without permanently altering the crane with resultant loss of its original functions. The crane of the copending ap: plication is rather limited as to'its reach beyondits sup.- porting platform, yet it may perform very well the functions originally intended therefor. Toextend .the usefulness of such a crane and promote the versatility thereof, is one of the primary objectives of the present invention.

With reference to the accompanying drawings,12 indi cates a supporting platform for the crane, which platform may be mobile by reason of itsasqciation witha motor vehicle. Upon the platform may be'fixed a base 14. to

support an upright rotatable standard 16 constituted usually of several concentrically arranged tube sections as.

shown in Fig. 5, the innermost tube section 18 being rotate. Latching means are provided for locking the standard in various rotated positions, the latching means being releasable to permit swinging of the beam laterally above the platform.

At the top of standard 16 is a pivot 21) which supports one end 22 of a beam 24, the opposite end 26 of which carries a pulley 28 to support a ,cable, chain, or other flexible load suspender to be trained over the pulley in any suitable mannerduring normal usage of the crane, for example as disclosed in the copending application aforesaid. At a point onthe beamintermediate the ends thereof, a pivot 30 may be provided to mount the free outer end of a piston rod 32 which-may be extended and retracted relative to an hydraulic cylinder 34, for elevating and lowering the pulley end of the beam. The lower end of the cylinder may be pivoted as at 36 to a bracket 38 which is fixed to the standard for rotation therewith. Three representative positions of the beam are.

indicated upon Fig 1, resulting from actuation of the hydraulic ram constituted of the cylinder .34 and piston rod 32,

Whereas in some cranes the beam is straight, as in Fig. 8, the beam of Fig. 1 is shown bent atan angle near its middle. The beam-may consist of a pair of spaced parallel side plates 40 and 42 connected at their upper edges by an integral web 44, the lower. edges of said plates being joined at intervals by means of welded platelik-e struts 46 which reinforce the beam and maintain the required spacing of its side plates.

To modify the crane in accordanee with the present invention, an elongate extender 48 is applied to the outer as shown. Fixation of the extender to the. beam may be achieved bymeans of an inverted U-shaped yoke having pa p r rm 54, 5 depend n rom th le 50, 50 of'the extender 48 at its inner end 56. The yoke may be welded or otherwise fixedly secured to the extender channel transversely thereof, and the free ends of the yoke legs 50, 50 may be perforated in alignment to receive a transverse removable pin 58, which pin serves as an abutment to bearupon the, tgremost reinforcing,

strut 46 of the beam for precluding npward displacement of the extender relative'to the beam.

To assist in preventing longitudinal displacement of the extender 48, the legs 5tl, 50 may be notched as at 60, 66 along their lower edges to engage the extending ends of'pulley shaft 62. The shaft ends rest in the notches 60, 60 as shown in Fig. 1, engagement being maintained by the weight of the extender 48 and any load applied thereto.

A travelling hook may be appliedto the extender, comprising a carriage 64 having at its upper portion a roller 66 adapted to ride lengthwise along the base 52 of the channel-like extender, said base 52 providing a track for supporting the roller. The carriage may comprise a pair of spaced parallel side members 68, 68 connected at their upper ends by the roller shaft 70, and at their lower endsv may be provided, one such means being indicated in Figs. 1 and 2, comprising one or more stops applicable to the beam extender. The stops may be in the formof pins 76 projected transversely through selected pairs of apertures 78 in the legs 50, 50, the apertures being located preferably near the track or base 52. The pins or stops extend sufficiently from the legs 50, 50 to furnish obstructions to travel of the carriage lengthwise of the beam extender. Pins or stops such as 76 may be applied fore .and aft of the carriage, if desired, to limit its travel. At the free end 80 of the beam extender, a permanent or fixed stop 82 may be applied to preclude the carriage from running off the end of the track.

It may here be noted that the carriage 64 may travel toward the crane standard as far as the yoke 54, thereby making possible the deposit of a load carried by the hook 74, squarely upon the platform 12. This added versatility of the structure is obviously advantageous, in that movements of the load to and from the platform is expedited, and repeated manipulation of the hydraulic ram is reduced to 'a minimum. The carriage 64 is shiftable both forwardly and rearwardly of the pulley 28, along the beam extender.

In the modification, Figs. 8 to 10, the crane shown is identical to that of Fig. 1, with the single exception that the beam 24 thereof is straight rather than angular. Like in Fig. 1, the beam comprises side plates 40, 42 spaced apart and reinforced by struts 46, and the free end thereof carries the pulley shaft 62 as usual.

The beam extender 84 of Fig. 8 may comprise an inverted channel including a pair of spaced parallel side plates 86, 86 connected together at their upper edges by a base 88 integral with the side plates. The lower edges 90, 9 of the side plates may diverge from the forward end 92 of the extender rearwardly toward the left end 94 thereof, resulting in a gradual increase in height of the side plates. Intermediate the ends 92 and 94, and relatively close to the rear end 94, the side plates gradually are reduced in height so as to produce a generally triangular configuration of both side plates. At its widest point, each side plate is cut away near the base 88, to provide a hook 96 having a downwardly opening throat 98 to receive the extending end of pulley shaft 62. This hook construction being duplicated at opposite sides of the beam extender, provides an efliective means simple of construction for suspending the beam extender from the ends of pulley shaft 62.

The reduced rear end 94 of the beam extender may carry a rigid spacer 100 for the side plates, which spacer spans the plates and provides an abutment to engage the foremost strut 46 of the beam, thereby to preclude dropping of the forward end of the extender and maintaining it at a predetermined angularity to the major axis of the beam. Spacers additional -to that at 100 and 92'may be provided between the side plates Wherever necessary, as indicated at 102.

Within the confines of the channel forming the beam. extender, and along the lower edges thereof, may be welded or otherwise fixed a pair of spaced parallel rails 104, 104 which serve as a track for a carriage 106 supporting a hook 108. The carriage may be constructed of two parallel side plates 110 between which the hook 108 is embraced and supported. At their upper ends, the carriage plates may carry a pair of transverse shafts 112 and 114 having ends which extend in opposite directions from the plates, and upon the ends of the shafts are rotatably supported the rollers 116 which ride upon the tracks 104, permitting shifting of the carriage freely from end to end' of the beam extender. The character 118 indicates a spacing Washer on each roller shaft, located between the carriage side plates 110, 110.

The carriage 106 may be precluded from running off the ends of the beam extender, by means of the abutment 100 and the closing end 92 of the extender. From the foregoing explanation, it will readily be evident that a load carried bythe carriage hook 108 may be lifted vertically, and shifted horizontally along the beam extender, for easy loading or unloading relative to the platform 12. The modified form of beam extender just described has. the same advantages noted in the description of Fig. 1,.

' particularly with respect to ease of attachment and de-- tachment of the beam extender, as well as concerns the: increased versatility resulting from traverse of the carriage.

:both fore and aft of the pulley shaft 62, which permits.

disposition of the lifting hook well over the platform 12..

If desired, the beam extender may be provided with means for limiting travel of the carriage 106, in substan-' tially the manner explained in the description of Fig. 1, or otherwise.

Reverting to Figs. 5, 6 and 7, showing means to con trol rotation of the crane standard, it may be noted that bracket 38 is welded to a short tube section 120 which is in turn fixed about the standard section 16, .so that the bracket rotates with the crane standard. A flange 122, fixed to the bracket 38 and to section 120 for rotation therewith, overlies the stationary base plate 14 on the platform, and may rotate relative thereto in spaced parallelism.

Atop the flange 122 may be mounted .a vertical plunger housing 124 in which may be reciprocated aplunger 12 6. The plunger may be spring loaded as shown, so that its lower end 128 may be induced always to approach the stationary base 14, and enter any holes 130 of said base which may be in registry with the plunger. The flange 122 thereby may be locked against rotation relative to base 14 by the action of the plunger. By lifting the plunger above the base 14, the flange 122 and the crane standard thereto attached may be rotated for swinging the beam laterally, as may be required.

Lifting of the plunger 126 may be accomplished by providing a rocker 132, pivoted intermediate its ends 134 and 136 upon the flange at a pin or pivot 138, the end 134 of the rocker being engaged in a transverse recess 139 of the plunger, to translate pivotal movements of the rocker into longitudinal movements of the plunger. Thus, when the exposed end 136 of the rocker is depressed, plunger 126 is elevated and withdrawn from a hole 130 of the base plate, permitting free rotation of the crane standard.

Means may be provided for holding the rocker in depressed position to ensure continued free rotation of the crane standard. Such means may comprise a latch 140 including a bolt 142 longitudinally shiftable over the rocker arm 136 when depressed, for holding the plunger in the elevated or retracted position. The latch bolt 142 may be constantly yieldingly extended, as by means of a spring 144, which permits bolt retraction whenever the rocker arm 136 strikes the inclined face 146 of the bolt. Upon full depression of arm 136, the bolt snaps over onto the rocker arm 136 by the action of spring 144, and remains in such bolt restrainingposition until such time as the operator grasps the finger piece 148 and manually retracts the bolt to release the rocker.

In the light of the foregoing explanation, it should readily be apparent that the improvements set forth result in various advantages, conveniences, and economies in the construction and usage of a hoisting crane. While the disclosure presents what may be considered preferred constructions and arrangements of parts employed, it is to be understood that various modifications and changes in structural details may be resorted to, within the scope of the appended claim, without departing from the spirit of the invention.

What is claimed is:

A hoisting crane comprising in combination, an upright standard having an upper end, a beam having a pivot end and a free end, and means hinging the pivot end of the beam to the upper end of the standard for disposition of the beam at various angles of inclination to the standard, means for elevating and lowering the beam about its pivot end, anelongate beam extender, and means for detachable mounting of the extender upon the free end of the beam to increase the reach thereof, said mounting References Cited in the file of this patent UNITED STATES PATENTS 1,736,877 Dalin Nov. 26, 1929 1,751,794 Crandall Mar. 25, 1930 2,503,590 Ormsby Apr. 11, 1950 2,517,813 Wallace Aug. 8, 1950 2,699,875 Stratton Jan. 18, 1955 2,772,790 Kauifman Dec. 4, 1956 2,773,606 Shepherd Dec. 11, 1956 FOREIGN PATENTS 932,468 France Nov. 24, 1947

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