US996259A - Pipe-lifter. - Google Patents

Description

C. KERR;

PIPE LIFTER.

APPLIGATIOK rum) APB-.12, 1911.

attorney 3nnentor 60f/66 fit? 72/:

Patented June 27, 1911.

9. D a 2 Jun. \\l v, a i, m I w W CHARLES KERN, 0F TELL, WISCONSIN. v

PIPE-LIFTER.

Specification of Letters Patent.

Patented June 27, 1911.

Application filed April 12, 1911'. Serial No. 620,730.

To all whom it may concern:

Be. it. known that I, CHARLES Knox, a citizen of the United States, residing at Tell, in the county of Bullalo and State of Visconsin, have invented new and useful Improvements in Pipcliitters, of which the following is a specification.

This invent ion re ates to improvements in pipe litters; and the object of the some is to provide a lifting clamp which will receive pipes of dilicrcnt diameters and can be quickly adjusted manuaily, and which is especially adapted to be grasped in the hands of the worlunen when the pi pc is to be lifted, as in raising pipes from a well.

While there have been large numbers 0 pipe holders for securely holding pipes which were being lowered into a well or raised therefrom, these prior pipe holds-rs have usually been cmistructed -and adapted for attachmentto a platform at the, mouth of the Well and are ordinarily bolted thereto. They have been principally used to regulate the descent of pipes into a well and to securely hold a pipe while sections were being added or remowzd. I am thoroughly familiar with the construction and use of these safety or holding clamps, which though perforun ing certain of the functions of my invention are in many important particulars quite distinct.

- Qthcr advantages will be apparent to those skilled in this art from the following description in connection with the accompanying drawings, in which- Figure 1 is a perspective view of my pipe lifter, shorting the manner of grasping a pipe: Fig. 2 is a side elevation of the same, partly in section; Fig. 3 is :1 top plan view of the lifter: Fig. 4. is av cross-section on the line tt of Fig. 2, looking in the direction of the arrow; Fig. 5 is an enlarged detail perspective view of the sliding jaw; and (i is a top perspective elevation of that portion of the frame which accommodates the sliding jaw. I

The frame 1 may be rectangular, and is provided with a central. aperture 3, extending through the side Wall upon one side, by means of which the lifter may be placed about a pipe. The frame upon either side of the central aperture is channeled or recessed longitudinally. In the recess or channel upon one side is a (log 4, piv otcd at 5, havinga V-shaped notch at its inner end,

undercut to provide a sharp biting edge to engage the pipe, and at its outer end a thumb or striking piece (3, by means of which the dog may be, quickly disengaged from the pipe. The opposite channel is provided with undercut side grooves 8', and lateral, oppositely disposed recesses 01' notches 8 located at a suitable distance from the aperture 3,

and extending entirely through the ledges provided by the aforesaid undercut channel. The movable jaw 10 is provided with a pair of tongues or flanges 9, projecting from the lowersirle edges and extending from the forward end to approximately the central longitudinal portion, and at the rear end with a pair of oppositely extending ears or lugs 10, projecting in alinement with said flanges. Nlien it is desired to assemble the parts, the jaw 10 is first placed over the channel in such ;a position that the flanges {i will extend over the aperture 3 and the ears or lug's 10will register with the recesses S. It may then he lowered into operative position and he slid longitudinally in the ehanuel,-tho flanges 9 and lugs '10 being guided in the grooves S. F or the purpose of adjusting said sliding jaw quickly and without the. necessity for a. wrench or other 'tool, I provide a threaded stem 11, which engages an innit-null screw-threaded bore 13 of the movable jaw, said stem" alsohuving a squared portion 1i which passes through a squared opening in'aknurled thuinb-picce 1 .3 fitting within the recess 1'7. By rotating the thumb-piece in o'ne'direction orthc other. the jaw 10 is moved forward or backward,

the opposite walls of the recess Serving as.

thrustlieariugs.

The base of therhfter frame 13 integral with the sides and forms a solid, firm support under the dog 4' and sliding j'uw 10, us

indicatcd at 2. The inner end of the jaw -10 is also supported upon one side'a's it projects into the central opening by the ledge 2 of the base. twill thus be seen that I have provide-l an exceedingly strong and rigid its channel until the frame can be placedaround the pipe, after which the jaw 10 is mov d into engagement with the pipeby means of the thumb piece 16. The handles 18 may now be grasped b either side and the pipe li ted bodily." If it is desired to release the pipe or to perni'it itto slide downwardly, theouter enal 6 of the pivoted dog is depressed; while if it is desired to remove the lifter from the pipe, the

' ing the handles upon either side, thus dispensing with the usual lifting tackle required to be used in conjunction with the -platform holder.

' The frameis exceedingly compact and strong, the recess 3 being ma'de as narrow as ossible, while the. sliding jaw is made considerably longer in order to secure: a verywide bearing surface. In .order to accomplish this result, Ihave made special provision for assembling the long jaw within the frame. The lugs 10, located at the rear end of the sliding jaw coiiperate with the flanges 9 to furnish a very wide bearing support, while the narrow recess 3 prevents an undue weakening of the frame at the center.

-For the purpose of illustration, I have describedin detail one embodiment of my invention, but it- .is evident to those skilledin the art that. changes can be made in the details of'construction without departing from the spirit of the invention, and I mean to cover any such changes in the claims as might readily occur to the skilled mechanic.

I claim as my invention and desire to secure by Letters Patent- A 1. A portable pipe lifter comprising a supporting frame provided with a central aperture extending laterally from one sideand channels in the top of the frame extending longitudinally upon either side of said aperture, a dog pivotally mounted within one of said channels, the other of said chan- -nels being provided with undercutside porionsf-formmg longitudinal guide ledges, a clamping jaw adapted to slide longitudinally "within the last-named channel and. having flanges projecting oppositely from the forward portion thereof and a pair of cars orlugs projecting from the rear end,

said guide ledges having a ;pair of oppoa man upon;

sitely disposed recesses to register with said lugs when said flanges rcgister with said central aperture, whereby said movable jaw may beplaced within its channel. and means formoving and holding said jaw in any desired position in the channel.

2. A pipe, lifter comprising a "frame ha ving a central aperture extending laterally from one side and channels in the top of the frame extending longitudinally upon each side of the aperture, adog pivotally mounted in one of the channels, the other of said channels being provided with longitudinal guide-ledges, a clamping jaw slidably mounted within the last-named channel, a

flange upon each side of the forward )or-" tion of said jaw, a lug upon each side 0' the rear portion thereof spaced apart from. said flanges, the aforesaid guide ledges having oppositely disposed" notches at a distance from the central aperture in the frame equal to the length of the gap between the luL-x and tongues, the said lugs and gaps upon the jawbeing adapted for registration with the cotiperating parts of the frame whereby the jaw may be placed within or removed from-its respectivechanneled portion when said parts-are in registry, and means for moving said parts out of registry for purposes of operation. j

3. A pipe lifter comprising a .frame 112wing a central aperture extending laterally fromv one side and channels in the top of the frame extending longitudinally upv-u each side of the aperture, a dog pivotally mounted in one of said channels and nor- 'mally supported upon the frame. guide ledges overhanging the other channel, a clamping-jaw slidably mounted within the last-named channel having oppositely ex tending flanges guided by said ledges, a supporting ledge spanning said aperture and adapted to support the forward end of said clamping-jaw, a recess in the frame at the rear of one channel. and a rotary tlnunh-- iece mounted within said recess and ha:- mg' a bolt extending therefrom and in threaded engagementivith' said clamping jaw, the opposite walls of said recess servin as thrustbearings for said tlnunl'Y-piecc. n testimony whereof I have hereunto set my hand in presence of two subscribing nitnesses. CHARLES KERN. -Witnesses I S. I. learn,

M. Swot-m.

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