US1651575A - Pipe wrench - Google Patents

Description

Dec. 6, 1927.

W. L. BESSOLO PIPE WRENCH 2 SheetS-Sheet l Filed July 1923 ld J I so Patented Dec. 6, 1927.

UNITED STATES 6 1,551,575 PATENT c erics.

. L. BESSOLO, F OLEABWATER, CALIFORNIA. V

PIPE wnnno rr;

Ap lication med July This invention relatesto' a" wrench for pipes, tubings, etc, and itis an object of the invention to-provide' an. effective, convenient and reliable tool of this character.

It is a general object of this invention to provide an improved, effective and convenient means for releasably setting a wrench of the: chaintype in eperatingzposition ona 'pipe'or the like.

It is another object. of this invention to provide a wrench which will effectively-engageand grip completelyaround a pipe or the like, so that it will. not slip and will not injure the pipe.

-Th'e various objects and features of my invention will-behest and more'fully understood from the following detailed description of a typical preferred formof the invention, throughout which description reference is had to the accompanying drawings, in which: J

Fig. 1 view'showing my improved wrench arranged. on a pipe ready to be set in operating; position; 7

.Fig. 2 is a View similar to Fig. 1, showingoneof the side plates in section, and showing the tool set in operating position on the pipe;

Fig; 3 is an enlarged detail sectional view,

so taken as indicated by the line 3--3 on Fig. 2; Fig. 4 isa' central section. View of the wrench, showing it setnready for operation; Fig. 5 is an enlarged detail sectional view, taken as indicatedby the-line 55 on Fig; 1; m

Fig, 6is an enlarged detail sectional view, taken as indicated by, the line 6-6 on Fig.1; I f. Fig. 7 is an enlarged side elevation ofa portion of the handle, showing the safety catch in operation; and

. .Fig. 8' is a detailed transverse sectional view, takenas indicated by the line 8+8 on 'Thewrench eludes, generally, a lever -1-O,'a flexiblejaw 11', means 12; permanently connecting the inner lend of'the flexible jaw 'll'wi h the"v lever 10, means 13' for releasablyfloperatively connecting the outer'end ofthe-flexible jaw. 14 operable 11 with theleverlO, and means to set the means-13.

The lever 10, in its preferred fOIH1,-,,i11-

cludes a handle 15, and head. 16 at the inner, endofthe handle The head 16 is preferably flat; and in the. form of an en- 1 provided by this. invention in- 1923. Serial no. 650,273.

largemen-t a-tthe inner end. oft-he handle 15. .The. flexible jaw 11 may be-in the; form of! a chain, including links 17, connected by pint-1e pins 118. The present invention is, of course, net concerned with the detailsof the former-construction of thefl'exible. jaw 11-, it being important-only for it to have the: desired gripping action and that it be sufiiciently flexible tooperate as hereinafter described; It is desirable to design. andconstreetthe jaw 11. so that it. will conform closely to a pipe or the like, and that; it be strong and durable. The inner side of the chain maybe roughened, or otherwise constructed, so that it is effective in gripping a pipe orthe like. p 1 r The means 12, which connects the inner 5 end of; the flexible jaw llwith the head 16, includes two check or side plates 19 arranged at opposite sides of the head 16 and providedwith parts 201 which project from the head. Theplates 19. are connected to the head by a pivot pin 22. The links 17, at the inner end of the flexible jaw ll, are arranged between the parts 20 and are connected with the parts 20 by apivot pin 21. The means 13, for connecting the outerw 'j' end of the flexible jaw 11 with the head 16, includesan arc-,uate-toothed jaw 23 connected to the outer end of, the chain by a pivot pinv 2. 1, a series of teeth 25 provided onthe outer part ofth head 16 to cooperate with. the'teeth of the jaw. 23, and means for open ating the head, 16 to put the teethv 25 into co- V operative engagement withthe teeth of-the jaw. Thejaw 23, which is practically apart The teeth26, at, the outer'edge of thejaw 28,

have faces 27-which face inwardly or towa'rd the flexible jaw 11. The teeth 25 on the outer part of the'head 16, have faces 28 adaptedto cooperatively engagethe faces 27 V of the teeth 26. V r

The means 1 1' provided by my present: invention for putting the teeth 25 and 26 into cooperative engagement, includes, generally, cam means at'or in combination with the connection between the head and the side" plates operable to shift the head relative to the side plates, and means for releasabIylOck ing the. cam means in its actuated. position. In the: particular" form of the invention (ill 32 may he in the form of a small lever illustrated in the drawings the means 1st includes a earn 30 mounted on the pin 22 to operate in an opening 31 in the head 16, and an operating handle 32 in connection with the pin 22 whereby the pin can he rotated to actuate the cam. The cam shown in the drawings is in the form ofa round disk mounted echentrieally on the pin while the opening 31 inthe head is also round and mounted on one end of the pin at the outer side of one of the side plates 12). i The handle may be secured or fixed on the pin 92 by a suitable key 35, or the like. It is preferred to mount the handle 32 on thepin 22 so that it extends at suhstantially right angles to the handle when the head is in its i out or released position and is substantially parallel withlhe handle 15 when the head is in its operating or in position. The cam and handle are related so that the handle is swungf in the direction indicated by the arrow A in Fig.1, to cause actuation of the head from the released position to the operating position. i

For the purpose of locking the head in operative position a latch l0 pivotally mounted onthe caln operating handle 32 to cooperate with the handle 15. The latch 40 is arranged at the outer end of the handle 32and is carriedhy a pivot pin 41. The

inain part of the latch extends inwardly Iii to position where the recess 13. y

-Atgripping plate is provided at the projecting parts of the side platesso that under the handle of the lat-ch. the latch so that it projects from the end of the handle 32 and has a downwardly projecting 1 art 4:2 adaptc-rd to extend into recess 4:3 in the upper side of the handle 15. A spring it is arranged between the handle 32 and the latch to normally yleldingly hold the latch down and shoulders 4-5 are providcdon the latch and handle so thatthey cooperateto limit the downward movement A handle at) is provided on and is in position that it cauhe conveniently depressed when the handle 32 is gripped. The handle has an inclined surface l7 at the recess etS to lift the latch as the handle 32 hiring moved the part d-52 will drop into "thetool will grip as effectively at that point aslatotherpoints. The plate 50 extends hetween the projecting parts 20 of the side plates, its ends being carried in recesses 51 in. the projecting parts. In the forrn of the invention illustrated .111 the drawings the plate 50 is connected with the other parts of the tool by a lug provided on the plate so that it extends between the links 17 at the inner end of the flexible jaw and is held hy the pivot pin :31. The face of the plate may be provided with teeth 55, orthelike,

so that it is ciiective in gripplng a pipe, or

the like. in practice i prefer to make the plate atlas large as possible without lnter- :lering with the other parts. By providing i the plate 50 thetool will grip practically uniformly around a pipe and Wlll have as much bearing or gripping surface at the projecting parts of the side plates as at any otheripoint. i i

In applyingthetool toa piece; of work, for instance, a pipe 31 the/flexible jaw 11 is arranged around the pipe and the *jaw;23 is arranged between the side plates 19-a11d the hcadlo and pipe P asfar as it will go.

Duringthe time that the jaw 23 is being arranged in place the handle 32 is in the rition shown in Fig. 1 so thatthe head 16 .11 its released position. To throw or set the tool in operating condition the handle;

3:3 is swung; in the direction indicated by the arrow it. so that (the side plates llland head in were relatively until the head is in its in position with the teeth 25 at the outer part of the head 16 in cooperative engageincnt \vrth the teeth .loion the 'jawi23,ras

illustrated in Fig. 2 oft-he drawings. Upon the parts reaching this positionthe partAQ of the latch enters the recess 13 to automatically catch and lock the tool in the set position. To operate the tool the handle 15 1S swung in the direction indicated by the arrow 13" Ill li-ig. 1, so that the headlG swings or turns, causing the jaw 23 to he moved or urged in the direction indicated by the an 1 row O in Fig". 1, therehycausing the fle2riblc jaw 11 to tightly grip the pipe P.

It urther movement of the lever will cause operation or turning of the pipe P; then pipe the latch released by depressing the handle at; and the handleSQ is swungbaek to the position shown in Fig. 1, thus causing the teeth to withdraw from the teetlrQG allowing the jaw 23 to be withdrawn and the jaw ll opened. 1 From the foregoing descripiion of theconstruction and scheme of operation of any improved wrench it will he ohr'ious that it isertrernely simple, eilective and rel] able in operation, that it will operate elli'cctively on work of variousisizes, and that it is siniple, practical and comparatively int-ltl'76115lt8 ot construction.

Haring described only a typical preferred :torin or my invention I do not wish to limit n'iyself to the specific details hereinabove set torth but wish to reserve to myself any it is desired to release the tool from the i arranged between the lever and object, and 5 cam means connecting the other end of the jaw with the lever operable to shift the lever relative to said first mentioned end of the jaw, the cam means having sufficient throw to move the lever into'and out of c0operative engagement with the first mentioned end of the jaw.

2. A wrench including, a lever, a flexible jaw adapted to be arranged around an object, one end of the jaw being adapted to be arranged between the lever and object, a shiftable pivotal connection between the other end of thejaw and the lever whereby the lever is shiftable relative to said'first mentioned end of the jaw, the cam means having sufiicient throw to move the lever into and out of cooperativeengagement with the first mentioned end of the jaw. and operating means for the connection,

3. A wrench includin a lever, a flexible jaw adapted to be arranged around an ob- 'ject, a shiftable connection between one end of the jaw and the lever whereby the lever is shiftable relative to said end of the jaw to move into and out of cooperative engagement with the other end of the jaw, and releasable means for automatically locking the lever in position to cooperate with said other end of the jaw upon its being moved thereto.

l. A Wrench including, a flexible jaw adapted to be arranged around an object, a plurality of teeth at the outer end of the aw, a'lever having a part adapted to cooperatively engage the teeth, and single means connecting the inner end of the jaw with the lever so that it can swing relative to the lever and so that the lever is shiftable relative to it .to move said part into and out of cooperative engagement with the teeth.

5. A wrench including, a flexible element,

a jaw at the outer end of the flexible element, teeth on the jaw, a lever havingteeth at its inner end, and means pivotally shiftably connecting the inner end of the flexible element with the lever so that the lever is shiitable relative to the inner end of the element to move the teeth on the lever into and out of cooperative engagement with the teeth of the aw. v I

6. A wrench including, a lever having teeth at its inner end, a chain adapted to'be arranged around an object, a platecbnnecting the inner end of the chain with the lever, a toothed jaw at the outer end of the chain adapted to extend between the object and the inner end of the lever, means at the connection between the plate and lever operable to move the lever relative to the plate so that the teeth on the lever cooperatively engage the teeth on the jaw, and an operating lever attached to said means.

7. A wrench including, a lever having teeth at its inner end, a chain adapted to be arranged around. an object, a plate connecting the inner end of the chain with the lever, a toothed jaw at the outer end of the chain adapted to extend between the object and the inner end of thelever, means at the connection between the plate and lever operable to move the lever relative to the plate so that the teeth on the lever cooperatively engage the teeth on thejaw, an operating lever for said means, and a manually releasable catch in connection with the operating lever operable to automatically lock the operating lever in position wit-h the teeth in cooperative engage nent.

.8. A wrench including, a lever, a flexible jaw adapted to be arranged around an obj set, a connection between one end of the jaw and the lever whereby the lever is shiftable relative to said end of the jaw into cooperative engagement with the other end of the jaw, an operating handle operable to shift the lever, and means for automatically lockingthe lever in position to cooperate with said. other end or" the jaw upon its being if mowed thereto including, a sp'ring'latch con nected with the handle to cooperate with the lever to prevent movement of the handle.

9. A wrench including a flexible aw, two parts, one a lever adapted to cooperatively engage the outer end of the jaw the other a plate connected with the inner end of the jaw, a pin extending through the lever and plate to connect them, a cam on the pin cooperatively engaging one of the parts to cause shifting of the parts upon rotation of the pin, and an operating lever on the pin. i

. 10. A wrench including, a flexible jaw, a lever having an opening through it at its inner end, a plateconnected with the inner end of the jaw, a part at the inner end of the lever adapted to cooperatively engage the outer end of the vjaw, a pin extending through the plate and lever to connect them, a cam on the pin and arranged in said opening so that it causes shifting of the lever relative to the plate when the pin is rotated, and an operating handle for the pin.

In witness that I claim the foregoing ;I have hereunto subscribed my name this 29th day of June, 1923. r

WILLIAMVL. B'nssoLo.

lOO

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