US1018936A - Pipe lifting and lowering jack. - Google Patents

Description

T. M. SMITH.

PIPE LIFTING AND LOWERING JACK.

APPLIOATION FILED MAY 19, 1910.

1,018,936. Patented Feb. 27, 1912.

2 SHE-ETB-BHEET 1.

a Mow, w

I x o meq;

CCCCCCCC PLANDGRAPH CO., WASHINGTON, D. C.

T. M. SMITH. PIPE LIP-TING AND LOWBRING JACK.

. APPLIOA'I'ION FILED MAY 19, 1910. 1,018,936. Patented Feb.27, 1912.

2 SHEETS-SHEET 2.

a; 2 /516 a a/z COLUMBIA PLANOGRAPH c0 WASHINGTON, n. c.

THOMAS MONROE SMITH, OF MULLIN, TEXAS.

PIPE LIFTING AND LOWERING JACK.

Specification of Letters Patent.

Patented Feb. 27, 1912.

Application filed May 19, 1910. Serial No. 562,292.

To all whom it may concern:

Be it known that I, THOMAS M. SMITH, a citizen of the United States, residing at Mullin, in the county of Mills and State of Texas have invented certain new and useful Improvements in Pipe Lifting and Lowering Jacks, of which the following is a specification.

My invention relates to mechanism for raising and lowering pipe out of or into a well, or raising and lowering pipe in like situations, and the object of the invention is to provide a verysimple, durable and eiiicient mechanism for the purpose whereby a length of pipe may be positively clamped, shifted, held in its lifted position and again lifted,.until the whole length of pipe has been carried upward, or whereby the pipe may be clamped, lowered into the well a certain distance, again clamped and again lowered.

A further object is to provide a mechanism which may be conveniently operated by one.

or a number of operators, and which will also hold the pipe that a wrench may be used for the purpose of removing couplings or unscrewing their joints.

For a full understanding of the invention reference is to be had to the following description and accompanying drawings, in which Figure 1 is a perspective view of one form of my inventionl Fig. 2 is a horizontal section thereof, on line 22 of Fig. 3. Fig. 3 is a vertical section on the line 33 of Fig. 1-. Fig. 4 is an end elevation of another form of my invention. Fig. 5 is a detail perspective view showing means whereby the operating levers are connected to the yokes, and Fig. 6 is a perspective detail view of one of the pipe gripping dogs and its releasing treadle.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying, drawings by the same reference characters.

Referring to Figs. 1, 2, and 3 it will be seen that my device comprises a, base of any suitable character, but shown as being formed of a rectangular frame composed of parallel spaced bars 2 and 3, and end-bars 4. Mounted at each end of the frame and attached to the side bars by the bolts or rivets 5 are the yokes 8. These yokes are U-shaped and are held in rigid relation to the side-bars of the frame by means of diagonal brace-bars 9 which are riveted at their ends to the yokes 8 and to the side-bars. the yokes 8 are connected by the longitudinally extending bar 10 which is arched at its middle as at 11. The middle portion of this bar 10 is laterally curved or deflected as at 12. Attached to the middle portion of the bar 10 and opposite to the deflected portion 12 is the member 13. This memberis pivoted to the bar 10 at one end and at the other is engaged with the bar 10 by means of a clip or other fastening device 14. It will be seen that the deflected portion of the guide-bar 10 and the curved member 13 together form a pipe guide and support. Mounted between.

the yokes 8 and movable vertically therein is the movable frame 15 which is rectangular and which has the'spaced side-bars l6 and the end-bars 17. The side-bars at each end are provided with outwardly projecting studs 19 which contact with the inner edges of the yokes 9 so as to guide the movable frame between the yokes, these studs being preferably provided with the anti-friction sleeves 18. Pivotally supported in the base frame are the oppositely disposed pipeengaging dogs 20 and 21, these dogs at their rear ends being pivoted upon bolt-s 22 which pass through perforations in the side-bars 2 and 3. These dogs extend toward each other and are provided with cross-pieces 23 1 which overlap the side-bars 2 and 3 and act to support the dogs at a slight upward in- The upper ends ofwardly bent at their ends and'eXtend over the edges of the side-bars 16 so that the dogs are supported in an upwardly inclined position. The biting edges of the dogs are slightly concaved so as to get a good engagement upon thepipe. In order to provide means for lifting the movable frame I pro vide the frame at opposite ends with the links 30. Theselinks are approximately U- shaped, and the opposite arms of the links are connected to the opposite side-bars of tached at its upper end to the curved middle portion 12 of the cross-bar 10 as shown clearly in Fig. 3. The lever 32 is pivoted to this vertical bar and acts when it is depressed to raise the links 30 and thus raise the frame 15. It will be seen that as the frame is raised the dogs thereon will grip the pipe and as it is lowered, said pipe being held stationary, the dogs will slip or slide down over the pipe so as to get a new grip thereon. For the purpose of releasing the Y pipe from the grip of the dogs 21 I provide a treadle 36 which is pivoted upon a bracket 37 attached to one of the sidebars 3 of the base frame, the inner end of the treadle extending beneath the dog 21 so that when it is depressed the dog may be raised. It will be obvious that this treadle might also be operated by hand provided it is placed in a convenient place for this purpose. I do not wish to be limited to the positioning of this treadle or lever. It will, of course, be obvious that the frame could be so arranged that it may be placed in position around a pipe without the necessity of lifting the frame and putting it down over the pipe. To this end I form one of the base frame members, as for instance, the bar 2 in two sections, the-adjacent ends of which are spaced from each other as at 38 so as to provide an opening by which the device may be slid laterally over the pipe to be operated upon. F or the same purpose I form the corresponding side-bar of the movable frame 15 in two sections. This side-bar, however, as it is subjected to considerable strain must be provided with means whereby the two sections of the side-bar may be connected. For this purpose I provide a sliding sleeve 39 which is slotted as at 39 through which slot passes a. pin on the side-bar 16. After the device has been placed upon a pipe this sleeve is moved back and over the space between the two sections of the side-bar so as to make the side-bar practically integral.

The construction which has heretofore been described is adapted to be used by one man and is intended for very light work. In order that my mechanism may be used for very heavy work, I have modified it as will be now described, and as shown in Fig. 4. In this last named construction the movable frame instead of being operated by one lever, located at the middle thereof is operated by two levers projecting out from the ends of the frame. The treadle whereby the dog 41 is operated projects also out from the end of the frame. This construction provides means whereby two operators may lift the pipe or lower it, while a third operator uncouples the joints of the pipe.

Referring now to Fig. 4, 40 designates th base frame which is rectangular as previously described, and is provided with the oppositely disposed pipe gripping dogs 41 pivoted at 42 in precisely the same manner as the dogs previously described. Attached to the opposite ends of the frame 40 are the upwardly extending U-shaped yokes 43 of the same construction as the yokes 8 previously described, and connecting the upper ends of the yokes is the longitudinally extending pipe guiding bar 44. The middle section 45 corresponds to the section 13. The yokes43 and the frame 40 are connected by the diagonal braces 46. Themovable frame 47 is of precisely the same construction as the movable frame heretofore described, and is provided with the dogs 48 of the same character and shape as the dogs 25 and 26. The movable frame at opposite ends is provided with the bifurcated links 49 of the same form as the links 30. So far the construction is precisely the same as that heretofore described. Depending from the upper ends of the U- shaped yokes 43 are the eye-bolts 50. The lower ends of the bolts are formed each with an eye 51. Mounted in each of the eyes 51 is a lever 52 whose handle end proj ects outward and whose inner end is hooked shaped as at 53 to engage with the eyes 49 of the links 49. It will be obvious that upon a depression of the free ends of the levers that the frame 47 willbe raised and that the dogs 48 will grip the pipe being operated on and raise the same, and that when the pipe has been raised to the. full extent of movement of the levers 52 that the dogs 41 will engage the pipe to hold it raised. A reverse movement to that above described will of course lower the pipe. The treadle instead of extending out toward the side of the frame, is attached to one of the dogs 41 and then ext-ends upward and then parallel to the dog 41 and out at the end of the machine, this treadle being designated 54. The principle of the operation of both of these devices shown is precisely the same, the difference in construction being simply for the purpose of permitting more power to be applied to raise or lower the pipe.

The operation of my device will be obvious from what has gone before. If it is desired, for instance, to lift a pipe, the machine is placed over the pipe with its lower dogs in engagement on either side thereof. The movable frame is then depressed to as great an extent as possible, the dogssliding over the face of the pipe, and the levers 52 are then operated to raise the movable frame.

As the movable frame rises its dogs willbite the pipe and lift the same, the pipe sliding over the edges of the dogs on the lower frame. When the end-levers have been depressed to their utmost extent they are moved upward. This releases the dogs of the movableframe and the pipe will immediately slip downward were it not for the dogs on the base frame which grip the pipe and hold it in posit-ion until the dogs on the movable frame againgrip the pipe for a lifting action. In lowering the pipe the same operation takes place. The movable frame grips the pipe and lowers it and when the movable frame has reached the limit of its movement and is about to be lifted the lower dogs will grip the pipe and hold it in place until the pipe is again engaged by the dogs on the movable frame.

It will be obvious that in this operation it is necessary to raise one of the dogs on the fixed frame, and it is for this purpose that the foot-lever or arm 54 is provided.

lVhile I have shown both of the dogs on the base frame or on the movable frame as being pivoted, it will be obvious that only one need be pivoted, the other being made rigid with the frame. I do not wish to be limited to the precise construction illustrated, as it is obvious that many changes might be made without departing from th spirit of the invention. It will also be plain that while I have shown my pipe lifting mechanism in two separate and distinctforms illustrated in Figs. 1 and 4, yet that the mechanism can be so made that it may be provided both with the lever 32 and the levers 52 so that the device may be formed either into a machine operated by a single operator or capable of operation by two operators. To change the machine from the form shown in Fig. 1 to that shown in Fig. 4 it is only necessary to detach the links 30 from the arms 33, remove the lever 32 from the upright 35, place the eye-bolts 50 in the yokes 8 and connect the levers 52 with the eyes in the links 30. One of the dogs 20 and 21 and one of the dogs 25 and 26 may be a fixed dog if desired, and yet operate in precisely the same manner, though not as conveniently as with the construction shown.

While it is not absolutely necessary, it is convenient to provide one of the dogs 8 with an operating lever 55, whereby the upper set of dogs may be easily released from the pipe.

Having thus described the invention what is claimed as new is 1. A pipe lifting device of the character described including a baseframe, supports on the ends of the base frame, a transverse cross-bar on said supports having means for guiding the pipe, a movable frame guided by said supports, a lever for raising the movable frame relative to the base frame,

and dogs on the base frame and movable frame for engaging a pipe.

2. A pipe lifting mechanism of the character described comprising a base frame, oppositely disposed dogs mounted in said frame adapted to engage a pipe, supporting yokes at the ends of the base frame, a pipe guiding bar mounted on the upper ends of the supporting yokes, a movable frame hav ing sliding engagement with the yokes and mounted in alinement with the fixed frame, pipe engaging dogs mounted on the movable frame and oppositely disposed to each other, a lever operatively mounted upon the base, and a link engaging the lever with the movable frame,

3. In a device of the character described, a base frame composed of parallel side-bars, dogs pivotally supported between said sidebars, means for supporting the dogs in an upwardly inclined direction, oppositely dis-. posed yokes on the ends of the frame, a longitudinally extending guide-bar mounted on said yoke, links attached to the movable frame, means for engaging the links to raise or lower the movable frame, and oppositely disposed dogs pivoted on the movable frame and extending toward each other at an upward inclination.

4. A device of the character described comprising a fixed frame composed of parallel side-bars, dogs pivoted between the side-bars and extending upwardly toward each other, means forv raising the free end of one of said dogs, yokes on the opposite ends of the base frame, a connecting bar between said yokes, a movable frame sup ported between the yokes and guided'thereon, said frame comprising parallel spaced side-bars, oppositely disposed dogs pivoted in'said movable frame, means for supporting the dogs at an inclination to the movable frame, links pivoted between the side bars of the movable frame, and means mounted upon the frame of the machine and engaging said links for raising and lowering the movable frame.

5. A pipe lifting'device of the character described, including a base frame having parallel side bars, the side bar on one side of the frame being formed in two sections spaced from each other to permit the insertion of a pipe, supports on the ends of the base frame, a transverse cross bar on said supports deflected at its middle to partially surround the pipe, a bowed member detachably mounted upon the cross bar opposite said deflected portion to partially inclose said pipe, a movable frame guidedby said supports and comprising spaced side bars, one of said side bars being formed in two sections to permit the insertion of a pipe, a sleeve detachably connecting said sections of the side bar, dogs on the base frame and on the movable frame for engaging apipe,

and means mounted on the supporting frame for-raising and lowering the movable frame.

6. A pipe lifting device of the character described, including a base frame, connected supports on the ends of the base frame, a movable frame guided by said.

supports, a lever for raising the movable frame relative to the base frame, and dogs on the base frame and movable frame for engaging the pipe.

7. A pipe lifting device of the character described, including a base frame having parallel side bars, the side bar on one side of the frame being formed in two sections spaced from each other to permit the insertion of a pipe, supports on the ends of his THOMAS MONROE SMITH.

mark Witnesses:

G. G. OALLENBAOH, R. H. BURGESS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

Images