US2076758A - Lifting and tipping band - Google Patents

Description

April 13, 1937. w. A. WHITING LIFTING AND TIPPING BAND Filed June 22, 1936 2 Sheets-Sheet l W. A. WHITING LIFTING AND TIPPING BAND April 13, 1937.

Filed June 22, 1936 2 Sheets-Sheet 2 Patented Apr. 13, 1937 UNITED STATES PATENT ()FFICE.

Application June 22, 1936, Serial No. 86,617

Claims.

, This invention relates to the art of lifting large cylindrical objects such as large sections of concrete pipe or the like. The invention is more particularly concerned with providing means for efficiently grasping a large cylindrical object so that the same may be lifted and-tilted while in mid-air.

It is a general object of the invention to provide a device which is capable of efi'iciently grasping a large heavy cylindrical object such as a green concrete pipe so that the object may be readily lifted with safety and ease without damage to the structure of the object or marring of its surface. It is also anobject of this invention to provide a device of thischaracter which is readily adaptable to hold the cylindrical object while it is being tilted in mid-air from a vertical position to a horizontal position or vice versa. It is a further object to provide a device of this character which is capable of immediately grasping 2. cylindrical object without slipping when the hoisting lines are raised.

In the production of concrete pipe of large diameter it is often desirable for convenience and 5 economy of operation to move the pipe before the concrete has attained its full strength. In this condition the concrete pipe must be handled with great care so as not to damage it. .Another difficulty encountered in lifting a pipe in this condition is the fact that for many purposes it is necessary to cover the pipe with coal tar or a similar substance which leaves a slippery surface. Added to this difficulty is the fact that there is a tremendous dead weight to be dealt with in that 35 large sections of concrete pipe, say of approximately fifteen feet in diameter by approximately twelve feet long weigh about forty (40) tons. Various types of cradles and tackle have been used to pick up these large sections of pipe, but to 40 the best of my knowledge there has never been perfected a cradle or tackle which would efficiently and safely grasp these huge sections of pipe without slipping or pinching or marring the surface. In this connection it should be remem- 45 bered that the pipe is standing upright on end when formed and it is desirable to lift the pipe and tilt it while in mid-air so as to set it down on its side.

In view of this, it is a more particular object 50 of this invention to provide means for adequately grasping large sections of concrete pipe, which have not attained their full strength and which may have been coated with a slippery substance, so as to lift the pipe from an upright position and 5 remove the section to some other place, at the same time vtiltingtne .pipe from an upright position to .a position at right angles thereto and setting the pipe down on its side.

The details in the construction, together with other objects and advantages of the invention, will be apparent from the following description of the accompanying drawings, in which Fig. l is a side elevation of a section of pipe having a lifting and tipping band thereon embodying a form of my invention; 10

Fig. 2 is a view similar to Fig. 1 showing the pipe section in tipped position;

Fig. 3 is a view similar to Fig. 1 showing the pipe section tipped into horizontal position;

Fig. 4 is an end view of the pipe section in hori zontal position;

Fig. 5 is a side elevation showing the gate section ofthe band;

Fig. 6 is a side elevation showing the adjustable ends of the band; and

Fig. 7 is a diagrammatic extended view showing all parts of the device;

Fig. 8 isa fragmentary view of a modified form of my invention.

The tipping band consists of two curved sections H and 12, formed of sheet steel or other. suitable material, each having two fixed sheaves I3, l4 and [5,16 respectively mounted thereon at their adjacent ends I1 and I8. 20 designates a cable which is secured at one end to the end N3 of one section. This cable 20 passes around sheave I3 on the other section thence around sheave l5 and back through a guide 2| under a fixed sheave 22 and upwardly therefrom forming a loop 23 which is supported by a lifting pulley 24. The cable then passes under a fixed sheave 25, around a movable sheave 26, back around a fixed sheave 21, the end of the cable being fastened to the movable sheave block 28 which sheaveblock is provided with a short locking cable 29 having aloop or eye 30 formed in one end to engage a hook or lug 3| on the other section II.

Cable 32 on the other section is similarly mounted as described with respect to section 12, one end of the cable being secured to the end I! of section I2 and the other end being connected to a movable sheave block 33 provided with a cable 34 having an eye 35 for engagement with a hook or lug 36 on the section I2. The middle portion of the cable 32 is looped about a pulley 31. The pulleys 24 and 31 are spaced apart by a frame 38 as shown in Fig. 4, the frame being provided with a pulley block 39 and hoisting cable 40.

In use, the tipping band is placed around the object'to be lifted, a, concrete pipe section 4|, as shown in Fig. 1, the ends of the cables 29 and 34 being manually secured to their respective lugs 3| and 35 located on opposite sections. The hoisting cable is then tensioned causing the cables 20 and 32 to become taut thus tightening the lifting band through the action of the cables 20 and 32 cooperating with the various sheaves. The weight of the device is suflicient to resist the lifting action of the hoisting cable until the device has firmly engaged the pipe 4|.

The pipe is then lifted by means of the hoisting cable 40. and while in mid-air is tilted by means of hook 42 and tilting cable 43 as shown in Figs.

2 and 3. Sheaves 44 and 45 serve to guide cables 20 and 32 during the tilting operation as shown in Figs. 2 and 3. 7

Having been tilted, the pipe is then lowered on its side at any desired place upon blocks 46 and 41.

In the form shown the sections H and I2 are hinged at 48 and 49 in order'to facilitate coupling and uncoupling of the device. After the pipe has been lowered upon the foundation the hoisting cable 40 is slackened ofi making possible the uncoupling of. the cables 29 and 34. This permits the hinged portions 50 and 5| of sections II and I2 to swing outwardly away from the pipe as shown by the broken lines in Fig. 4.

The tipping band may then be easily removed.

However, it is to be understood that sections I l and I2 may each be made in one piece without any hinged portion.

It is not necessary that the arrangement of sheaves be exactly as shown and described. Thus if heavier objects are to be lifted and more mechanical advantage is desired to tighten the tipping band around the object additional sheaves mightbe used. Also, if lighter objects are to be lifted fewer sheaves might be used.

As an alternative form particularly desirable for lighter objects the ends I1 and I8 of bands II and I 2 may be hinged together as shown at in Fig. 8, in which case sheaves I3, l4, l5 and I6 are-omitted andcables 20 and 32 joined at that point forming in fact a single cable.

I claim as my invention:

1. For use in handling pipe or the like: a band adapted to partially encompass a pipe comprising two plate sections; fixed sheaves mounted on adjacent ends of said sections; means for connecting the other ends of said sections comprising movable sheaves having cables adapted to be secured to opposite ends of said sections; and

1 cable means extending around said fixed and said movable sheaves, said cable means being anchored to said adjacent ends and to said movable sheaves. s V

Y 2. For use in handling pipe or the like: a band adapted to partially encompass a pipe comprising two curved plate sections; fixed sheaves mounted on adjacent ends of said sections, movable sheaves; guide sheaves interposed between said fixed sheaves and said movable sheaves mounted on the respective sections; a cable attached at one end to one of said movable sheaves, said cable passing around said guide sheaves mounted on one of said sections around said movable sheave to which .it is attached and around one of said fixed sheaves on the other section and being attached at its other end to said other section; a second cable attached at one end to the other of said movable sheaves, said cable passing around said guide sheaves mounted on said other section around said movable sheave to which it isattached and around one of said fixed sheaves on said'first mentioned section and attached. at its other end to said first mentioned section; and means for attaching said movable sheaves to said plate sections.

3. For use in handling pipe or the like: a band adapted to partially encompass a pipe comprising two curved plate sections; a fixed sheave mounted on the adjacent end of each section; movable sheaves; guide sheaves mounted on the respective sections interposed between said fixed sheaves and said movable sheaves; spaced lifting pulleys; cable means extending over someof the sheaves on each of said sections'and having its ends secured to said sections and to said movable sheaves; said cable means having loops extending over said lifting pulleys. i

4. For use in handling pipe or the like: a band adapted to partially encompass a pipe comprising two hinged plate sections; fixed sheaves mount-' ed on adjacent ends of said sections; movable sheaves; guide sheaves mounted on the respec tive sections interposed between said fixed sheaves and said movable sheaves; spaced lifting pulleys;

a cable attached at one end to one of said movable sheaves and at the other end to one of said sections, said cable passing over one of said movable sheaves, over some of said guide sheaves,

over some of said fixed sheaves, and looped over one of said lifting pulleys; and another cable attached at one end to the other of said movable sheaves and at the other end'to the other of said sections. said cable passing over one of said movable sheaves, over some of said guide sheaves, and over some of said fixed sheaves, and being looped over one of said lifting pulleys.

5. For, use in handling pipe or the like the com! bination of :a curved plate section having sheaves mounted thereonja secondcurved plate section having sheaves mounted thereon; cable means cooperating with the sheaves. of said plate sections to connect adjacent ends of said sections;

and detachable means connected to said cable means for connecting the other ends of said plate 4 sections.

- WILLIAM A. WHITING.

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