US3585703A - Tool for joining soil pipe - Google Patents

Abstract

MEANS ARE DISCLOSED TO AXIALLY ALIGN THE MECHANCAL FORCE FOR THE ASSEMBLY OF PIPE SECTIONS, SUCH AS SOIL PIPE, WHEREBY THE BELL AND SPIGOT ENDS ARE FORCED TOGETHER AND MOVED IN CONCENTRIC ORIENTATION DURING THE FORMATION OF A PIPE JOINT. AN ADAPTER OR SHOE IS DISCLOSED TO ENGAGE THE CURVED PART OR HEEL OF THE BELL END OF A PIPE SECTION, INCLUDING A SEAT FOR THE ENGAGEMENT OF A WORK MEANS, WHEREBY THE AXIS OF THE WORK MEANS, THE MAJOR AXIS OF THE PIPE SIGOT SECTION AND THE AXIS OF THE BELL SECTION TO WHICH IT IS TO BE JOINED ARE MAINTAINED IN A SUBSTANTIALLY IN-LINE ORIENTATION AT ALL TIMES. IN ONE EMBODIMENT THE ADAPTER OR SHOE HAS A CENTRAL SEAT AND A NOTCHED, RECESSED OR CONTOURED END TO ENGAGE THE OUTER LIP AND HEEL OF AN ELBOW, THE SEAT BEING AXIALLY ORIENTED WITH THE REMAINING STRAIGHT SECTION OF THE SPIGOT END OF THE ELBOW. IN ANOTHER EMBODIMENT THE ADAPTER IS OF A LARGER DIAMETER THAN THE PIPE AND HAS A SEAT FOR ENGAGING THE WORK MEANS LOCATED OFF-CENTER SO THAT WHEN IN ENGAGEMENT WITH THE BELL END OF AN ELBOW HAVING A SHARPER BEND, E.G., A 60* ELBOW, THE SEAT IS AXIALLY ORIENTED WITH BOTH THE SPIGOT SECTION OF THE ELBOW AND THE BELL END OF THE PIPE SECTION TO BE JOINED THEREWITH. IN STILL ANOTHER EMBODIMENT THE ADAPTER HAS A TRUNCATED END TO FIT THE HEEL OF A 90* ELBOW WITH AN ADJUSTABLE HOOK TO ENGAGE THE TOP EDGE OF THE BELL AND MAINTAIN IN-LINE ORIENTATION OF THE WORK MEANS. FOR THE ASSEMBLY OF TWO STRAIGHT PIPE SECTIONS THE ADAPTER IS PROVIDED IN THE FORM OF A PLATE AFFIXED TO THE SEAT AT A RIGHT ANGLE TO THE AXIS OF THE PIPE SECTION. A COMBINED UNIVERSAL TOOL HAVING SHOES TO FIT TWO OR MORE DIFFERENT ELBOW BENDS IS ALSO DISCLOSED.

Description

June 22, 1971 6055 TOOL FOR JOINING son, PIPE 3 Sheets-Sheet 1 Filed April 7. 1969 //VVENTOR THOMASJ. 6055 BY lglwmya 4% Attorneys June 22, 1971 T. J. 6055 3,585,703

TOOL FOR JOINING SOIL PIPE Filed April 7, 1969 3 Sheets-Sheet 2 /N VE/V 7'0 THOMAS J. 6055 By 424m 6.1%44) Ar forneys June 22, 1971 1', 055 3,585,703

TOOL FOR JOINING SOIL PIPE Filed April 7. 1969 3 Sheets-Sheet S I N VE N TOR THOMAS J- 6055 By 444441 4 1/ Jam) Attorneys United States Patent Olfice U.S. Cl. 29237 Claims ABSTRACT OF THE DISCLOSURE Means are disclosed to axially align the mechanical force for the assembly of pipe sections, such as soil pipe, whereby the bell and spigot ends are forced together and moved in concentric orientation during the formation of a pipe joint. An adapter or shoe is disclosed to engage the curved part or heel of the bell end of a pipe section, including a seat for the engagement of a work means, whereby the axis of the work means, the major axis of the pipe spigot section and the axis of the bell section to which it is to be joined are maintained in a substantially in-line orientation at all times. In one embodiment the adapter or shoe has a central seat and a notched, recessed or con toured end to engage the outer lip and heel of an elbow, the seat being axially oriented with the remaining straight section of the spigot end of the elbow. In another embodiment the adapter is of a larger diameter than the pipe and has a seat for engaging the work means located off-center so that when in engagement with the bell end of an elbow having a sharper bend, e.g., a 60 elbow, the seat is axially oriented with both the spigot section of the elbow and the bell end of the pipe section to be joined therewith. In still another embodiment the adapter has a truncated end to fit the heel of a 90 elbow with an adjustable hook to engage the top edge of the bell and maintain in-line orientation of the work means. For the assembly of two straight pipe sections the adapter is provided in the form of a plate afiixed to the seat at a right angle to the axis of the pipe section. A combined universal tool having shoes to fit two or more different elbow bends is also disclosed.

BACKGROUND OF THE INVENTION Soil pipes in common use are supplied in sections of varying lengths and sizes. Each section, whether straight or in the form of an elbow bend, has a bell end and a spigot end. The bell ends are formed so as to receive the spigot end of another section in telescoping and mating relationship, leaving a space therearound to receive a seal to join the sections in a fiuid tight relationship.

Formerly after the assembly of a bell and spigot type of joint, the seal was formed in the annular space between the bell and the spigot by caulking with oakurn or the like and then leaded to mechanically lock the sections together and complete the seal. Pipe joints of this character have many disadvantages, not the least of which are the cost and the time, labor and materials necessary to complete the joint. As a result the use of an annular resilent rubber or neoprene gasket between the bell and the spigot has replaced the caulked and leaded seal in present commercial practice.

Pipe sections are now assembled with considerable expediency and less cost since all that is necessary is to install the gasket within the bell end of a pipe section, align the spigot end of the section to be joined therewith, and force the spigot into the bell and into sealing relationship with the gasket. Although the interior surface of the gasket is generally lubricated, because of the nature of the gasket and the fact that it must be uniformly and concentrically compressed within the annular space to be effective, considerable force is required to accomplish the insertion of the spigot into the bell. For these reasons the art has developed various tools adapted to move the pipe sections lengthwise toward each other with little mechanical etfort.

One of the primary objectives of the prior art pipe joining tools is to maintain axial alignment and apply little if any lateral force to the pipe sections as they are moved lengthwise toward each other, since any misalignment can cause the gasket to collapse or be improperly sealed and produce a faulty joint. This objective the prior art accomplishes with facility for straight pipe sections where collars, chain clamps, hooks and tongs can be used to engage the sections. No provision is made for the joining of elbow bends to each other or to straight sections and this problem has been left to hand labor. Since elbow bends are shorter than the straight sections of pipe they are much harder to align, handle and force into a joint, there being nothing to hold or upon which a purchase can be ap-' plied. Extreme manual effort is necessary to handle elbow bends and generally one or two workmen must manually twist and turn the elbow by grasping it at the bell end to make a joint fitting. This is diflicult in the confined quarters of a trench or other narrow places where soil pipes must be assembled and often results in tearing or misalignment of the annular gasket and a poor seal. Furthermore, the prior are devices for soil pipe assembly are heavy, cumbersome and awkward to use to the extent that a contractor may find his workmen forsaking the expensive tool for their hands even in assembling straight pipe sections.

The instant invention has as its objective the elimination of the foregoing difficulties by providing a simple, light-weight, inexpensive tool for joining either straight or curved sections of pipe by the application of stright and constantly axially aligned working pressure during the formation of the pipe joint.

SUMMARY OF THE INVENTION This invention concerns primarily an adapter or shoe having a seat at one end and a contoured surface or edge defining a recess at the other end which engages the heel part of an elbow section in such a manner as to place and maintain the seat in axial alignment with the axis of the straightspigot end of the elbow. Means are provided for applying a compression force between the seat and the 'bell end of the pipe to be joined therewith to thereby move the spigot end of the elbow axially within the bell end of a pipe to which it is to be joined. More particularly the adapter, which can be formed from a piece of iron soil pipe, has an open end defined by curved side walls fitting the contour of the outermost curved wall or heel of the elbow, at least part way around from the straight section of the elbow toward the bell end or overlapping the bell end of the elbow. The adapter includes an integral protuberance or a hinged, adjustable hook member to engage the top inside edge or lip of the bell to lock the adapter upon the elbow against both lateral and axial dis placement, in cooperation with the contoured open end.

Although the invention will be described in relation to separate simple embodiments thereof constructed of soil pipe sections, adapted for use with elbows of different curvatures and for use with different compression means, it will be apparent that the dimensions can be changed such that one adapter can be formed, using these principals set forth herein, which includes all of the features and can be used as a common tool for all elbow bends. The invention, as it will be described herein, is directed to a tool or combination of tools that are simple to operate, whose functions and mode of operation are obvious to the unskilled by mere examination of the parts and which is therefore a tool that will be used. This latter aspect of the invention has already been demonstrated during the Patented June 22, 1971 development of the various parts and testing their feasibilities and ease of adaptation to on-the-job use under the most adverse conditions.

DESCRIPTION OF THE DRAWINGS Illustrative embodiments of the invention are shown in the drawings in which:

FIG. 1 is a fragmentary perspective view of one form of the device of this invention applied in the assembly of a 45 elbow to a straight pipe section;

FIG. 2. is a perspective view showing the seat end of the adapter of this invention for 45 elbow bends shown in use in FIG. 1;

FIG. 3 is a perspective view showing in more detail the engaging and contoured end of the adapter shown in FIGS. 1 and 2;

FIG. 4 is an end view taken from the plane of the lines 44 of FIG. 3;

FIG. 5 is a perspective view of an adapter cast as one piece with an integral handle;

FIG. 6 is a cross-sectional view taken along the lines 66 of FIG. 5;

FIG. 7 is a side plan view of the assembly shown in FIG. 1 with the chain harness reversed and the wall of the ram broken away to illustrate the piston;

FIG. 8 is a side plan view of a modified form of the adapter of FIGS. 5 and 6 as used with a lever having a variable fulcrum;

FIG. 9 is a cross-sectional view of the lever taken along the lines 7-7 of FIG. 6;

FIG. 10 is a fragmentary perspective view of a doubleended adapter used in combination with a lever;

FIG. 11 is a side plan view of a modified adapter in use in the assembly of a 60 elbow;

FIG. 12 is a perspective view of the adapter shown in FIG. 11;

FIG. 13 is an end view of the adapter of FIG. 10 taken from the plane of the lines 1111 in FIG. 12;

FIG. 14 is a fragmentary side plan view in partial section of still another modified adapter in use with a 90 elbow bend;

FIG. 15 is a fragmentary side plan view of another modified adapter in use with straight pipe sections;

FIG. 16 is a perspective view of the adapter shown in FIG. 15;

FIG. 17 is a perspective view, in reduced scale, of a double ended tool in accordance with this invention;

FIG. 18 is a perspective view, in reduced scale, of a tool having four elbow engaging shoes;

FIG. 19 is a fragmentary view of a modified form of cleat; and

FIG. 20 is a fragmentary view of a modified form of harness.

THE PREFERRED EMBODIMENTS Referring to the drawings, particularly FIGS. 1, 2, 3 and 4, there is shown an adapter 10 having a generally cylindrical wall 12 and a square cut base end 14. The tubular wall 12 is cut at an angle at the other end to form the uniformly curved front edge 16 defining the lip 18 at the bottom and terminating in the corner 20 at the top wall to form the protuberance or lip 22 which has the contour of the wall 12 and the curved end 24. The corner junctures of the edges 25 on each side of the lip 22 and the curved edge 16 on each side become a working surface as will be described.

The adapter 10 has the tubular seat 26 with a transverse bottom 28, seen best in FIG. 4, spaced inwardly from the edge 30 to form an aligning pocket therein. The seat 26 is held centrally of the wall 12, in this embodiment, by means of the radial supports 32 and 34. An advantage of this aspect of the invention is that these parts can be formed of ordinary metal pipe and bar stock, welded together or otherwise joined in the configuration illustrated. Any number of radial supports can be used or other means for affixing the seat 26 therein can be applied.

In FIG. 1 the adapter or shoe 10 is shown in position engaging the elbow 36 at its bell end 38 where it encompasses the outer curved portion or heel 40 in a nested relationship. The elbow 26 is of commercial manufacture provided with the bell or flange 38, the heel 40 defining the bend and the straight section 42 which terminates in the spigot end 44 (see FIG. 7) to be joined with the bell 38a of the pipe section 46 which can be either a straight or curved section of pipe representing the end portion of the pipe system already assembled. The pipe sections shown in FIG. 1 can be considered to be either horizontally or vertically oriented.

Means for compressing the adapter 10 against the elbow 36 to seat the spigot 44 in the bell 38a are represented by the ram 50 operated through the hydraulic hose 52 communicating to the inside chamber 53 (FIG. 7) and having the radial arms 54 on each side forming a yoke 'with the bifurcated cleats 56 at their ends held by the bolts or rivets 58. The cleats 56 have the spaced curved claws 60 adapted to receive a link 62 of the chain 64 placed edgewise therein, whereby the end of the next successive link, being at right angles thereto, is cradledby the curved fingers or claws 60 to lock the chain therein. The bight end 66 of the chain 64 is left to hang free.

The chain 64 has the clevis 68 or other attaching means at the other end. In place of the clevis a pear-shaped link can be used. The objective of either a clevis or a link being to provide means to slidably engage the second chain 70', and, when under tension, catch upon a link so as to lock therein.

The chains 64 and 70 form a harness which is easily and quickly wrapped around the pipe 46 and to provide a straight-line pull against the bell 38a. The chain 70 has the hook 72 at the end (FIG. 7) so that it is easily wrapped around the pipe and engaged. The hook 72 is made large enough to prevent the disengagement of the clevis 68 from the chain 70 and form a harness means. As seen from FIG. 7 the harness can be assembled with the hook 72 on either side. The other end of the chain 70 adjustably engages the corresponding cleat 56 on the other side of the yoke in the same manner as the chain 64. The yoke of the ram means 50 is also reversible and thus easily applied.

Referring to FIGS. 1 and 7, the assembly shown is attained by simply applying the chain harness around the plpe section 46 against the bell 38a, placing the spigot 44 into the entrance of the bell 38a of pipe section 46 for receipt by the lubricated gasket therein (not shown), and, placing the adapter 10 in position with the lip 18 at the bottom of the heel 40 and with the tongue 22 into the open end of the bell 38. In this position the edges 25 at the corners 20 engage across the end of the bell. The width of the tongue 22 is less than the diameter of the inside opening of the bell 38. The inner end of the ram 50 is placed in the seat 26, abutting against the bottom 28. Hydraulic pressure, as through a simple hand or foot-operated pump (not shown) is applied through the hose 52 to the chamber 73. This causes the sealed piston 74 to extend the ram 75 and pull the yoke (64-70) so that the elbow 36 is thrust into the bell 38a. The line of force is substantially axial because of the manner in which the adapter 10 centers the housing of the ram on the axis of the straight section 42. A movement of about 3 inches as indicated by the arrow 76 accomplishes the seating of the joint.

In FIG. 8, the ram has been replaced by the lever 80, the details of which are also shown in FIGS. 9 and 10. The lever 80 can be of any configuration, e.g., tubular or a solid bar adapted to be slidably retained in the sleeve 82 and is provided with the radial yoke arms 54a and 54b affixed to the bottom end, similar to the yoke arrangement on the ram 50. These arms also carry the pair of bifurcated cleats 56a which function in the same manner to selectively engage the chain harness on either side of the pipe. The sleeve 82 carries a pair of spaced arms 84,

at the ends of which the ram member 86 is pivoted by the means of the transverse pin 88. The ram 86 is adapted to slidably fit within and be centered by the seat 26 and engage the bottom 28 of the adapter 10a. In FIG. 7 the adapter 10 is shown engaging a quarter elbow 36 for assembly with the fixed pipe section 46. The adapter 10a (FIG. 8) is modified over that of FIGS. 1-4 in that the face end 14 is foreshortened and the seat 26 is lengthened so as to protrude therebeyond.

In the embodiment so far described the diameter of the adapter is preferably slightly smaller than the diameter of the pipe and elbow being assembled. The adapter can be made from a pipe section or cast in a solid piece so as to fit elbows of any angular bend including one-fifth bend (72.5") and one-sixth bend (22.5).

In this connection reference is made to FIGS. 5 and 6 wherein the adapter 10b is shown having the protruding seat 26a and the contoured recess 89 and the modified tongue 22a, with the top handle 90 formed as an integral cast unit. This adapter body 91 can be formed of aluminum or other light metal or metal alloy or plastic such as fiber glass or resin compositions such as an epoxy containing reinforcing materials such as glass wool or metal chips to form a light weight high strength tool. Color coding can be used to identify the adapter size or elbow angle with which it is to be used. The concavity 89 is readily contoured to fit exactly against the heel 40 of an elbow bend. This can be done inexpensively by using a cut-out heel section as part of the mold in the casting of the working face 89 of the adapter 1012. In this manner the concavity can be formed with the arcuate recess 92 at the top to receive the outer flange of the heel of an elbow. The handle 90 can be separately attached if desired and forms a convenient hand hold in orienting the adapter between the elbow and the ram.

In FIG. 10 the lever 80 is shown in use with a doubleended adapter 10c wherein the tongue 22 and lip 18 have the same configurations of the corresponding parts of the adapter 10 of FIG. 2 to fit and shown fitted against a quarter elbow 36. The other end of the adapter 10c may be contoured in accordance with this invention to fit a sixteenth bend as desired. This is shown by the modified tongue 22b and lip 18b. The adapter 10c can be formed by casting as described in FIGS. 5 and 6. The details of this kind of double-ended modified adapter are shown in FIG. 17 wherein the seats 26 at each end are recessed sufficiently inside the edges 16 so as not to interfere with the seating of the heel of an elbow therein. As shown, the double ended adapter can be provided with a handle 90. In this instance the contoured ends can be adapted to fit and make with a 45 and a 60 elbow, as an illustration.

The adapters so far described can be contoured to fit any of the commercial elbow bends. This is particularly true where the adapters are formed as a casting. As the angle subtended by the elbow bend increases beyond 45, e.g., to a 60 bend, it is desirable to move the axis of the seat 26 down and larger diameter adapters can be used. Thus, FIGS. 11, 12 and 13 illustrate another form of adapter 10d which has a diameter larger than the pipe section being assembled and is used for sharper contoured elbows 96. Thus, the elbow 96 (FIG. 11) a 60 elbow, can be a four-inch pipe while the adapter 10d can be a five or six inch pipe. In this embodiment the seat 26 is afiixed to the inside wall of the adapter as by weldments 98. The relationship of the center of thrust 100 (FIG. 13) and the center 102 of the straight section of the elbow 96 (shown in dotted lines) is shown to be practically coincident. Also since, in this instance, a ram 50 can be used in place of the lever 80, the line of pull by the harness would coincide with or be in a plane including the center 100, or a plane approaching the center 102. Thus, axial thrust by the assembly is assured. Even when using the lever 80 (FIG. 11), by raising the lever in the sleeve 82 the fulcrum point represented by the cleat 56a, is moved upward to a plane approaching the thrust point represented by the pin 88. The adapter 10a is cut so that the lip ends at the bottom of the curve of the elbow and the cut edge 16' is such that the opening cradles the flatter counter of a 60 elbow. The larger diameter adapter 10d places a thrust point above the fulcrum, illustrated by the cleat 56a to further balance these forces.

Referring to FIG. 14, there is shown another modification of the adapter 10:: which is contoured, formed or out along the edge 16 to fit the elbow 110. In this instance the tongue has been omitted so that the adapter fits the contour of the elbow as at 112. The modified adapter 102 has a hook member 114 which is affixed to the top center of the adapter as by means of the small plate 116 carrying the hinge 118. The hook 114 can be formed in two pieces and 117 slidably and adjustably joined by a bolt 120 and a wing nut 122 engaging the slots therethrough. The contiguous surfaces 124 of the parts 115 and 117 are serrated to form a firm clamping action.

FIG. 15 shows a modified adapter 10 in which the collar and contour parts are omitted and the seat 26 abuts to the end plate 126 to serve as a bottom for ram 50 (FIG. 15), and, also acts as a seat to press against the other square end of a straight pipe section 46a, here being assembled to another straight pipe section 46. In all of the embodiments thus far described it is to be understood that the various elbows being assembled can be fitted to either a straight section 46 or any other elbow bend, as in assembly of an S-bend.

In FIG. 19 a modified form of cleat 56b is shown which can be used with either the ram 50 or the lever 80. A cleat 56b can be used on each end of a yoke member. In this embodiment the cleat has the shaft 130 aflixed thereto and extending in the line of pull on the harness through the sleeve 132 at the end of the yoke arm 54 with the threaded end 134 extending therethrough and engaged by the small hand wheel 136. The threads 134 are coarse so that a half twist of the wheel 136 will take up the length of a link or a fraction of the length of a link to take up any small amount of slack that may be present in the harness as first applied to the assembly. Thus, the harness can be quickly assembled and initially tightenend on both sides with facility.

In FIG. 20, a modified form of harness is shown which can be used with any of the yoke arrangements so far described, and is characterized by its greater adjustability and ease in handling. Here, for purposes of illustration, the chain 62 has the pear-shaped link at the end. The chain 70 wraps around the elbow bead 36, shown in phantom, passes through the link 138 and fastens upon itself by means of the spring hook 140. The spring hook 140 is large enough to engage over the outside of the chain 70 and engage itself around a link to provide an adjustable clasp. The hook 140 can have a spring 142 or other arrangement which when depressed or withdrawn opens the hook so that it can slide to another position or be removed and again engaged over the chain. The harness, thus constituted is adapted to be used with any size of pipe.

Referring to FIG. 18, there is shown a four-ended tool 10g having contoured ends or edges 16a-d adapted to be used with a one-sixteenth bend, a one-sixth bend, or a oneififth bend, a one-eighth bend and a 90 bend respective y.

From the description it is apparent that the apparatus of the invention includes an adapter having a contoured end adapted to engage the outer curved heel end of an elbow bend and a seat at the other end adapted to receive or be received by and axially orient a workpiece of an applied force and maintain this orientation with the axis of the spigot end of the elbow bend. It is apparent that a number of modifications can be made in the parts without departing from the invention. The seat 26 can be a bar received by a tubular ram shoe. Also, the ram means and the adapter do not have to be separable parts and these portions of the apparatus can be afiixed to each other in any suitable manner. The harness 64-70 can be a cable or any other suitable attaching means.

What is claimed is: 1. A pipe assembly tool for joining the spigot end of a curved section of pipe with the bell end of another section of pipe comprising:

an elongated adapter member having seat means at one end and a concavity at the other end; said concavity including and defined by a protruding tongue member on one side of said concavity and a lip member along the other side of said concavity; said tongue being adapted to engage over the edge of the bell opening of said curved section of pipe and said lip being adapted to nest about the curved heel of said curved section of pipe; and means to apply a force upon said seat and hold said other section of pipe thereagainst whereby the spigot end of said curved section of pipe is moved into the bell end of said other section of pipe. 2. A pipe assembly tool in accordance with claim 1 in which:

said adapter member has a tubular Wall; said protruding tongue and lip members are defined by edge portions of said wall; and said seat means comprises a tubular recess supported substantially centrally from the inside of said wall. 3. A pipe assembly tool in accordance with claim 1 in which:

said adapter member has a tubular wall having a diameter larger than said section of pipe to be joined; and said seat means comprises a tubular recess supported on a side of said tubular wall diametrically opposite said protruding tongue, the diameter of said tubular recess being greater than the radius of said tubular wall of said adapter member. 4. A pipe assembly tool in accordance with claim 1 in which:

said adapter has a tubular wall and is provided with a concavity at each of its ends; said seat means comprises a tubular member supported substantially centrally from the inside of said wall intermediate said concavities and is provided with a transverse base wall intermediate its ends to receive said force means. 5. A pipe assembly tool in accordance with claim 1 in which:

said adapter is a solid member with said seat means comprising a blind bore hole at said one end; and said concavity comprises a shallow curved recess in the surface of the end with a transverse curved groove thereacross; said recess conforming to the heel of said curved section of said pipe and the groove adapted to nest about the outer surface of the bell end of said curved pipe section. 6. A pipe assembly tool in accordance with claim 1 in which:

said force applying means comprises an extensible member adapted to detachably engage within said seat;

detachable harness means to connect between said extensible member and said other section of pipe whereby actuation of said extensible member applies an axial compression force to move the spigot end of said curved section of pipe into the bell end of said other section of pipe.

7. A pipe assembly tool in accordance with claim 1 in which:

said force applying means comprises a body member adapted to detachably engage within said seat with one end thereof extending outward from said seat;

a lever member pivotally attached to the extended end of said body member; and

detachable harness means to connect between said lever member and said other section of pipe whereby pivotal movement of said lever member applies an axial compression force to move the spigot end of said curved section of pipe into the bell end of said other section of pipe.

8. A pipe assembly tool in accordance with claim 7 in which:

the pivotal mount for said lever member includes a pivot pin carried by the extended end of said body member; a yoke member carried by said pivot pin; said yoke member carrying a tubular housing; and said lever member is slidably received in said tubular housing whereby the effective mechanical advantage of said lever member is adjustable. 9. A pipe assembly tool in accordance with claim 7 in which:

said detachable harness means comprises a chain adapted to circumferentially engage said other section of pipe and including a pair of side chains adapted to adjustably engage said lever member. 10. A pipe assembly tool in accordance with claim 1 in which:

said tongue of said adapter member comprises a cleat member pivotally mounted at one end to said adapter member and having a hook end to engage over the edge of the bell end of said other section of pipe, said cleat member and hook ends being adjustable longitudinally in relation to each other whereby said tool is adapted to seat upon and engage the bell end of a curved section of pipe having an elbow bend of to References Cited UNITED STATES PATENTS 331,147 11/1885 Mallinckrodt 29237 1,655,640 1/1928 Altfather 29-237 3,096,876 7/1963 Scudieri 29237X 3,181,234 5/1965 Gill 29237 3,483,608 12/1969 Madden 29-237 ROBERT C. RIORDON, Primary Examiner J. C. PETERS, Assistant Examiner

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