US2329850A

US2329850A - Pipe tong

Info

Publication number: US2329850A
Application number: US365918A
Authority: US
Inventors: Joseph A Peterson; Carl E Olsen
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-11-16
Filing date: 1940-11-16
Publication date: 1943-09-21
Anticipated expiration: 1960-09-21

Description

p 3- J. A. PETERSON ETAL 2,329,850 v PIPE TONG I Filed Nov. 16. 1940 2 Sheets-Sheet l $05.14. PETERSON CARL E OLSEN INVENTORJ- .RTTOEWEK J. A. PETERSON ETAL.

} Sept.'21, 1943.

PIPE TONG Filed Nqv. 16, 1940 2 Sheets-Sheet.2

' JOSJQPEQ CA-RLEDLsEN.

I INVENTOR. aim (3.02M.

Arron/z).

Patented Sept. 21, 1943 32,329,850 PIPE TONG Joseph A.

Peterson and Carl E. Olsen; Houston, Tex.

-. Application'November 16, 1940,'SerialiNo. 365,918

90laims. (oifsiqiij The invention relates to a pipe tong of the type used in making up and breaking down pipe connections.

The general arrangement of the structure,

jaws, handle and locking device of the present disclosure is the same as that set out in the patent to J. A. Peterson and Carl E. Olsen, 1,857,397 issued May 10, 1932. The presentimprovement;

however, embodies anattachment for the tong wherein the jaws will be extended or moved'to open position so that" they may bemore readily passed about a pipe. 1

In the previous patent the jaws were normally held retracted by a spring, and it was found that considerable wear on the teeth of the tong resulted in forcing the jaws about a pipe. The present L improvement therefore contemplates that the jaws may be extended by the operator just prior to being passed about the pipe and in this manner the use of the tong will be facil-. itated and it can then be lockedin position about the pipe as disclosed and prior patent.

It is one of the objects ofthe invention to provide a pipe tong with a mechanism for extending the jaws to be passed about the pipe.

contemplated in said Another object .of the invention is to provide a pipe tong with a combination locking and extending device which will. extend the jaws when moved to one position and lock them in place when moved to another position.

Other and further objects of the invention will be readily apparent when the following description is considered in connection with the accompanying drawings wherein:

Fig. 1 is a side elevation of the tong with part of the handle broken away to show the arrangement of the jaws and the operating mechanism.

Fig. 2 is a view similar to Fig. 1 except the jaws are shown as being extended by the mechanism preparatory to being passed about a pipe.

Fig. 3 is a bottom edge view of the tong.

Fig. 4 is a section taken on the line 4-4 of Fig. 1. I

Fig. 5 is a broken detailed arrangement of the extending finger.

Fig 6 is an enlarged view of the combination locking and extending lever.

Fig. 7 is a section taken on the line 7-"! of Fig. 6.

Fig. 8 is a side elevation of the entire tong with the jaws in extended position.

In Figs. 1 and 8 the tong is shown generally and embodies a handle 2 having an enlarged head 3 which is provided with the forked por- -tions 4 and 5. This head as seenin Fig. 3 is bifurcated so as to provide the

side portions

7 and 8 which are spaced apart.

Eachof' the forked portions carries a' pivot pin 9 upon which the jaws Hf and-l2 are pivoted respectively. The jaw H as seen in Fig. 1--is portion I3 a tooth 26 which is arranged to havethe corner 21 thereof projecting beyond the'face 25 so asarranged for pivoting movement with the heel disposed in arecess between thesides ,r g v The'jaw 'l2 has a'slot 16 therein which is ar-- ranged =to receive-the' pin' 'fi. 'In order that the jaws'may have slidingmovement'relative to the pin, abearingblock I1 is arranged about the pin 9 and the jaw may slide on thisblock. Thejaw has a recess l8 therein from'whichthe spring l9'projects's'o as'to-bear'against the block l1.

A guide rod 28 is disposed within the spring. OneJend of the spring bears against the base of the recess 18 and normally tends to force the jaw to the right,"- asseen in Fig. 1-. This jaw'fll has a head 22 thereon which is arranged to fit in a socket 23'in' the heel'lB-of the jaw ll so that the jaws are coupledto'gether but are permitted relative pivoting and slidingmove'ment.

The jaw II hasa curvedface 25 which carries to "cut-'intothe surfaceof the pipe and retain an engagementtherewith." It' should be noted that the opening tooth 25 has a roundedbase which in turn receives a half round key 29 which can be driven place inbehindfthe key to firmly hold the k'e'yin when the ends thereof are bent over; 9

The jaw l2 has a recess 30 which carries spaced keys 26 so that there will be a three-point contact with the pipe.

Each of the side pieces I and 8 have a lug 33 projecting therefrom and a pivot pin 34 is passed therethrough. Pivoted on this pin is the combination locking and extending lever 35. The end 36 of this lever is arranged to be engaged by the operator and may be depressed into the.

recess 3'! provided in the handle as seen in Fig. 1, or it may be pivoted in a clockwise direction until the end 36 engages the back portion 38 of the jaw l2.

This lever 35 has a cam portion d0 thereon which is arranged to move closely against the surface 4| on the end [3 of the jaw H. These parts are so constructedand arranged that when the cam 40 engages the portion 4| of the jaw II that then the heel 13 of the jaw can not move in a clockwise direction. This, of course, prevents the jaw portion II from pivoting and locks 28 which receives the square both of the jaws together so that the tong will be firmly locked about the pipe.

Fig. 5 shows a finger 45 which is pivoted about the pin 34 and has a lug portion 46 thereon which is arranged to engage a shoulder 41 provided on the side lever 35. In this manner, as the lever 35 is pressed from the position of Fig. 1 into the recess 31, the shoulder 41 will move in a counterclockwise direction so as to move the finger portion 48 against the head 22 of the jaw l2. In this manner the head will be moved in the direction of the arrow shown in Fig. 5 so as to extend both of the jaws as seen in Fig. 2. The spring l9 helps to retract on the lever 35 to work the finger 45, must overcome the force of this spring.

A flat spring washer 50 may the pin 34 and between the lug 33 and the lever 35 and held in place by the spring 43 of Fig. 6. .A rivet 5| in the lug 33 bears against such washer and the washer has a recess 52 over the rivet and thus hold the lever in locked position. The prong 53 punched out of the 'recess 52 serves to clinch the washer 50 to the lever as best seen in Fig. 1. i i

In operation the lever 35imay be depressed as seen in Fig. 2 to extend the jaws and the tong passed about the pipe. The lever is then released so that the jaws move to retracted position and if the lever isthen pivoted over the position shown in Fig. 1 in a clockwise direction the cam 40 will engagethe heel portion 4| of the jaw II and lock both of the portions in position about the pipe.

Broadly, the invention contemplates an attachment for a pipe tong by which the position may be extended.

What is claimed is:

1. A pipe tong including a handle, a pair of jaws each pivoted thereon, means to normally hold said jaws retracted, additional means to extend said jaws including a lever to overcome said first means, and means on said lever to also look said jaws in retracted position.

2. In a pipe tong having a handle and a pair of jaws each pivoted on said handle, a leverto lock said jaws in pipe engaging position, and means operable by said lever when not in looking position to extend the jaws to be passed about a pipe.

3. A tong having a handle, a jaw pivotally mounted on said handle, a jaw pivotally and slidably mounted on said handle, a locking member to positively move said jaws together and the jaws, and the pressure be disposed about therein to fit,

prevent opening of said jaws, and means also operable by said member to move said jaws to open position.

4. A tong having a handle, a jaw pivotally mounted on said handle, a jaw pivotally and slidably mounted on said handle, a locking member to positively move said jaws together and prevent opening of said jaws, and means also operable by said member to move said jaws to open position when said member is moved away from the locking position.

5. A tong having a handle, a jaw pivotally mounted on said handle, a jaw pivotally and slidably mounted on said handle, a locking member to positively move said jaws together and preiventopening of said jaws, and means also operable by said member to move said jaws to open position,

said last means including a finger piece.

6..A tong having a handle, a jaw pivotally mounted on said handle, a jaw pivotally and slidably mounted on said handle, a locking member to positively move said jaws together and prevent opening of said jaws, and means also operable by said member to move said jaws to open position, said last means including a finger piece to be moved by said member.

'7. A tong having a handle, a jaw pivotally mounted on said handle, a jaw pivotally and slidably mounted on said handle, a locking member to positively move said jaws together and prevent opening of said jaws, and means also operable by said member to move said jaws to open position, said last means including a finger piece to be moved by said member and having projecting portions thereon to engage said member and one of said jaws.

8. In a pipe tong having jaws, a handle, means to pivot each of said jaws to said handle and to each other, a finger on said handle, means on said finger to engage one of said jaws, and a JOSEPH A. PETERSON. CARL E. OLSEN.