US1922128A - Pipe tongs - Google Patents

Description

J. C. GREEN Aug. 15, 1933.

PIPE TONGS Filed Oct. 28, 1930 Ja/M/ cm1/0 MEE/v.

Patented Aug.15,1933 l f y 1,922,128

. NUNITEDSllArEs PATENT OFFICE i PIPE ToNGs .Y lohn Gland Green, Dlibach',` La., assignor of onethir'd' toThcmas L. Owen, Dubach, La.

Application october` 23,1930. serial No. 491,775 s 1 claim. k(clairnav) l This invention appertains to wrenches and ing ina head 6. The rear end of the handle can m02@ Dallllll1y-130` Wrenches 0f the typeparf be provided with any preferred type of grip ticularly adapted` for use on round work, such plates 7, formed of leather, wood, rubber, orY the as pipes and the like. like.

5 One of the primary objects of my invention is The opposite sides of the head 6 are recessed 60:

150 DIOVdS a Dip@ Wrench O1' 'GOIlgS Comprising as'at 8, for receiving the shank portions 9 of the rigid jaws for engaging one side of the work, and jaw plates and 11. These jaw plates are ara flexible chain for engaging about the work, rangedin spaced parallel reaction to one anwith novel cooperating 'means carried by the other and are of a substantially kdiamond shape 10 ,chain and jaws for adjustably locking the in side elevation. The upper edges of the jawl 65 chain with the jaws. plates 10 and 11 adjacent to the inner ends Another salient object of my-invention is to thereof and in rear of Vthe transverse center provide a reversible pipe wrench or tong of the thereof is provided with a bridge block 12 and chain type, that is a wrench which can be utithis block is held in place by removable bolts 15 lized for turning the Work both in a clockwise 13 passing through the depending portion of 70': and counter clockwise direction, the wrench inthe bridge block 12 for securing the bridge block cluding a rigid `jaw for engaging one side of the firmly between the jaw plates 10 and 11. This Work having oppositely directed teeth arranged bridge block 12 overhangs the upper edges of on an inclined plane, with a chain for engaging the jaw plates 10 and 11 as shown in Figure 2,

` .about the `work pivotally connected to the rigid for the purpose of relieving strain from the re- 75j-,

jaw intermediatethe ends thereof and substanmovable bolt 3 and permitting the upper edges tially at the point of meeting of the oppositely of the jaw plates 10 and 11 to take up the strain directed teeth, the jaw carrying means for lockplaced upon the holding chain 17. The outer ing the chain in an adjusted position. face `of the bridge block is provided with a pair A further important object of my` invention is of spaced hooks 14, which form a lock for the 80' the provision of novel means for forming the holding chain 15. One end of the chain is left rigid jaw and'novel `means for connecting the free and the opposite end of the chain is pivotlocks for thechain'with the rigidk jaw. ally connected to the jaw plate 10 and 11 by Astill further object of my invention is to means of a pivot bolt 15', which is arranged 4providea pipe wrench of the above character, adjacent to the upper surface of the jaw plate 85` whichwill be durable and efficient in use, one` substantially at the transverse center thereof.V that will be simple and easy to manufacture, The chain 15 is of substantially the sprocket and one which can be placed upon the martype and includes the links 16 pivotally connectket at a reasonable cost. ed together by pivot pins 17, which extend bei With these and other objects in view, the yond the links. The links are adapted to be 90""A invention consists in the novel construction, arreceived betweenthe hooks 14 and the terminals rangement and formation of parts, as will be of the pivot pins seat in the bill of the hook to hereinafter more specifically described, claimed, bring about the locking engagement of the chain Vand illustrated. in the accompanying drawing, in with the jaw plates.

which drawingz- The lower edges of the jaw plates 10 and 11 951` Figure 1 is a side elevation of my improved incline upwardly inopposite directions to form wrench, showing the chain placed about the the substantially diamond shape of said jaw work. plates and these lower edges are provided with Figure 2` is a top plan view of the wrenchV oppositely directed bighting teeth 18 and 19.

4.5 showing parts thereof broken away and in sec- In use of my improved wrench or pipe tongs 10G tion. the jaw plates are placed overv or in engagement i i Figure 3 is a transverse section through the with the round work and the chain 15 is brought wrench taken on the line 3-3 of Figure 1 lookabout the same and the free end of the chain ing in the 'direction of the arrows. is brought between the jaw plates and the adja- 1 50,. Referring to the drawing in detail, wherein cent pivot pins 17 of the chain is `received in 105E similar reference characters designate `correthe bill of the hooks 14.

sponding parts throughout the several views, The work can now be swung on either side the letter A generally indicates my improved of the transverse center of the jaw plates for pipe wrench or tong, which includes an elonengagement either with theV teeth 18 or 19, and

"L gated handle 5, having its forward end terminatthus the work can be readily turned either in a lla' clockwise or counter clockwise direction. Thus I have provided a wrench of a substantially reversible nature in that the work can be freely turned either one way or the other.

From the foregoing description, it can be seen that an exceptionally simple and durable pipe wrench has been provided in which the work will be effectively gripped and in which a greater leverage can be obtained thereon.

The block 12 can be readily removed when worn by merely removing the bolt 13 and thus this block can be readily and easy replaced when necessary or desirable.

Changes in details may be made without departing from the spirit or the scope of this invention, but:-

What I claim as new is: j

A wrench for round work comprising a handle, a plurality of spaced rigid jaws xedly secured to said handle, said jaws being provided with upwardly inclined lower edges and upper inclined edges, oppositely directed ratchet teeth formed upon said lower edges, a gripping chain, a pivot bolt connecting one end of said gripping chain to the jaws substantially at the meeting point of the'upper inclined edges of the jaws, a removable bolt carried by the jaws, said pivot bolt being mounted in the rear of said removable bolt whereby the free end of said gripping chain when secured will overhang said pivot bolt, a bridge block having a depending portion extending between said jaws, said removable bolt engaging said depending portion and Xedly securing said bridge block between the jaws, said bridge block overhanging the upper edges of said jaws and provided with a pair of spaced hooks upon the upper face thereof, said gripping chain adapted to pass between the jaws and t over the top of said bridge block and engage said hooks for detachably securing the chain to said bridge block, the overhanging bridge block being adapted to transmit the strain from the chain to the top edges of said spaced jaw plates.

JOHN CLAUD GREEN.-

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