2,408,517 Oct l', 1946. P. A. HOWARD y PIPE CUTTING APPARATUS l Filedl Sept. 4, 1943 ` 73 v'/07 . 7W: 95 37 / if / i2 Z6 INVENTOR.Z P05551?. Howard. _JI ATTORNEYS. l ,Oct l, 1946.r ' p, A_'HOWARD ~ 2,408,517 PIPE CUTTING APPARÁTUS Filed sept. 4, /001943.A ' 95' 28 ,0g2 sheets-sheet . I 2 - l 0 5 Í "Y 7o 7/ 4/ 46 / ATTORNEYS. l 2,408,517 Patented Oct. 1, 1946 ' ï UNITED STATE s PATENTI OFFICE Posy A. Howard, Tulsa, Okla., assignor of one-half ¿ C. A. Mathey and onc-'half to C. B. Harter, ` 1 Tulsa, Okla. ` n to `Application September 4, 1943, Serial No. 501,271 '2 Claims. (Cl. 33-21) 1 >6 is> an end elevation ofthe pipecutting I . - This invention relates to pipe cutting appa ratus »and more particularly to a pipe cutting apparatus for effecting selected cuts in the wall apparatus.v . y ` v _ of a pipe, and has for its principal object to vpro vide for supporting a cutting device for circum ferential movement about the periphery of a pipe of the torch, said templet being for saddle kcuts Fig. '1 is a detail perspectiveview- of one form of >templet__ for controlling longitudinal movement or the like. . » - l , Fig. 8 is an enlarged «detail section through the While controlling longitudinal movement of said ring gear and shank members on the line 8-78, ycutting device relative 19e-said pipe. Fig. „ ` >Other objects of the invention are to provide a 6. 1 ' v ~ f ~ Referring more in detail to the drawings: longitudinally reciprccable cutting device mount v I- designates a pipe ycutting apparatus embody >ing the features ci the present invention and ing on guidesv rotatable around a pipe to beA cut; to provide for controlling longitudinal movement which includes a saddle member 2 adapted to of said cuttingV device for effecting selected cuts engage over theupper portion of a pipe 3 for in the pipe; to provide a guide for moving a cut supporting a cutting torch 4 for planetary move ting torch longitudinally of the pipe during cir 15 ment about said pipe. The saddle member 2 in cludes a semi-cylindrical body 5 having laterally cumferential movement `of said torch about the pipe for effecting cuts in said pipe in the shape extending end flanges 6 and 1 connected by longi of said guide; to provide.- for moving a cutting tudinal ribs 8, 9 and I0 on the respective sides of torch relative to a pipe to be cut for cutting openings I I for lightening the weight of the cast 20 shapes such Vas saddles, degrees, et cetera, in the ing and facilitating its application to the pipe. nature of fabricating pipe; t0 provider a templet In order to support the saddle on the pipe, the for the desiredfcutaround the pipe having ra body portion carries feet I2 for spacing the axis guide for engagement by a follower 'mechanism of thesaddle concentrically 'with the axis of the controlling movement of the'torch; to provide vfor pipe, said feet preferably being> adjustable to holding the templet in fixed relation to the pipe;V adapt the sadle to nt various diameters of pipe. Y to provide for ready application and adjustment ` , Depending from the side ribs 8 .and ID, adjacent of apparatus of this character to a pipe; to pro the endsthereof, are pairs of spaced ears I3 land vide -for accurately supporting .the .torch for I4, vcarrying cross pins I5 for securing the ends'of planetary movement vabout the pipe;jtor provide 30 flexible retaining members or cinches I8 and I1, an apparatus. of this character readily adapted which engage underthe pipes to which the saddle> for mounting on various diameters of pipe and Y is applied, saidfretaining members preferably in cluding chain sections AI8 connected tol the pins to provide a convenient, economical and eflicient pipe cutting apparatus of the character and for the purpose noted. » ' . In accomplishing these and other objects of the invention, 1I have provided improved details of structure, the preferred form of'which is illus trated in the accompanying drawings, wherein: Fig. l is aperspective view of a pipe Ícutting apparatus embodying the features of the present . I5 atjone side of the saddle and their other ends . connected by means of coil springs I9 and toggle levers 2%. The springs accommodatethe length of the'ñexible members to diiîerent diameters of pipe and the toggle levers stretchvthe springs to retain the retaining'members in engagement` with 40 the pins I5. ' y’ ' Í .` Fixed to the end of the end'ñange 1 of the saddle is a segmental ring 2|, having an annular inset shoulder 22 to forman annular seat 23 and paratus particularly showing the engagement of a radial flange 24 which cooperates with anfin ~ the` followerY with the templet for controlling 45 Wardly extending flange 25 and a keeper ringZß invention. f ` - ' . Fig. 2 is a side elevation of a pipe cutting ap movement of the torch. to> form an vannular Atrack vor'groove 21 of L Fig.'3 is a plan’ view of a pipe cutting appa shaped ycross-section. The ring» 2l and the keeper ring 26 Aare secured in concentric and axial align ratus, portions of the torch mounting guidebeing v broken away to better _illustrate the mechanismy ment with - the saddle by bolts 28 extending for controlling >longitudinal movement of the . torch relatively to the pipe. , . Fig. 4 is an enlarged detail section through the torch mounting guide on the line 4-4, Fig. 3. Fig. 5 is an enlarged detail section through the `torch mounting guide on the line 5-5, Fig. k3. 66 through openings?zll on the ñange 1 and through aligning openings 3i) and 3l in the respective ring members. yThe endsof the ring> members 2l fare formed on lines tangent to the inner diameter of _the saddle ‘2 asbest ‘illustrated in Fig. 6'to 2,408,517 form a slotted throat 32 to pass the pipe 3 when the saddle is placed thereon. 4 in angular adjusted position by means of a set screw 84. The torch carrying member 55 is pref Rotatably mounted in the L-shaped groove 21 erably provided with a bore 65 substantially of is a ring gear 33 having an inner diameter adapt the same shape as the cutting torch barrel, the ed to engage the seat 23 and an inwardly ex tending flange 34 interlocking with the ñange 25 Cil lower end of the bore 65 being curved, as at 66, to provide a seat for said cutting torch and 0f the keeper ring 25 whereby the ring gear is permit the nozzle end 61 of said torch to be pro retained in guided relation with the track mem jected through the bore and in close proximity «ber for rotation about the axis of the pipe, as to the pipe to be cut. later described. ' 10 Projecting outwardly from the side of the car The ends 35 and 35 of the ring gear segment riage 41 and through the openings 50 are ears are spaced apart in conformity to the width of 63 adapted to receive one end of springs 69, hav the throat 32 as illustrated in Fig. 6, the length ing their opposite ends attached to lugs 10 on of the ring gear segment being such that when bars 1| secured to the sides of the pairs of ver one end thereof is moving across the throat the tically spaced angles forming the arm 31 whereby other end is retained in guiding relation with spring tension is applied to the carriage 41 to the track member to assure that the opposite end draw same toward the gear. The end of the car is moving in alignment to re-enter the opposite riage 41 adjacent the ring gear is preferably pro end of the track member and due to the fact that the ends are always spaced apart less distance 20 vided with an extension 12 on which is mounted an upwardly extending collar 13 having a bore than the inner diameter of the track, the ring 14 therethrough for Aslidably receiving a shank will be retained thereon in all positions about 15 of a follower 16, the lower end of said follower the periphery of the ring. ' being provided with a roller 11 adapted to be in ' Fixed to the segmental ring gear, midway the substantial engagement with the pipe to be cut ends thereof, is an arm 31 for mounting the cut ting torch 4. The arm includes a bracket 33 se cured to the ring gear by suitable fastening means such as screws 39. Mounted on the bracket 38 and extending longitudinally of the pipe on the and held in >such position by means of a set screw 18 threaded into a boss 19 on the collar 13. ’I'he roller 11 preferably is provided with a flange 89 adapted to ride on the outer surface 8| of a templet 82 having a guide edge 83 adapt ed to he engaged by the roller 11 to move the torch longitudinally of the pipe as it is moved circumferentially thereof to provide a cut in said opposite side of the ring gear 33 to the saddle 2 are pairs of vertically spaced angles 49-4l and 42-43, said pairs of angles having upper and lower inwardly directed flanges 44 and 45 which pipe corresponding tothe shape of the templet. cooperate to form tracks for engagement of roll A spring 84 preferably is provided around the ers 45 on a torch supporting carriage 41, later shank 15 of the follower having one end engaged described. The respective pairs of angles are with the roller and the other end with the car spaced horizontally as at 48 to provide an open riage 41 to normally hold the roller in. engage ing through which the torch is projected and ment -with the templet 82. the outer ends of the angles being preferably The templet is preferably formed of two semi connected by a plate 49 to support the ends there 40 circular sections 84 and 85 hinged together, as of and form a rigid arm for carrying the cut at 85, whereby the sections may be hinged apart ting torch. The vertical spacing of the angles to permit application of said templet around the 4i), 4| and 42, 43 provide slots 59 in the sides of pipe 3, the open ends ofthe respective portions the arm for accomodating outwardly dirccted of the templet being held together by means of portions of the carriage 31, as later described. a screw 81 swivelly mounted in bosses 88, pref The rollers 4S are preferably rotatably mount erably on the lower portion 85 of the templet, ed on posts 5| extending through openings 52 in said screw being adapted to project through a the carriage member 41 and are hfld in adjusted slotted opening 89 in an ear 99 on the upper position vby means of set-screws 53,` a pair of the posts 5| preferably extending upwardly above the - portion S4 of the templet and adapted to receive a wing-nut 9| for drawing the open ends of the carriage 41 at each side thereof and a pair pref templet together and holding same. erably extending below the carriage at each side _ In order to support the templet from the sad thereof to provide two rollers 46 on each side of dle 2 and hold said templet against rotation rela the carriage engaging the lower flanges 45 of the tive to the pipe, the upper portion 84 is prefer arm and two rollers engaging the upper flanges ably provided with an outwardly extending ear 44 on each side of the carriage, whereby said 92 having an aperture 93 therein, through which carriage may be supported for free rolling move a bolt 94 may be extended to secure said templet ment throughout the length of the arm but heldv to the rings 26 and 2| and saddle 2, said bolt 94 against vertical or lateral movement relative passing through the respective plates in the same thereto. manner as the bolts 28. ` Arranged in the carriage l41 and centrally 1o The arm 31 is arranged at right angles to the cated relative to the laterally spaced angles of ring gear segments and the follower roller 11 held the arms is an opening 54 adapted to receive a in engagement withthe templet face 8| by means torch supporting member 55, preferably including of the spring 59 so that when the ring gear seg an upwardly extending collar` 55 slotted as at 51 ment is rotated about the track, the pipe is cut by and provided with bosses 58 to receive an adjust the flame from the nozzle of the cutting torch as ing screw 59 for tightening the collar 55 about itis revolved around the pipe and simultaneously the barrel 60 on the torch. The torch support moved longitudinally thereof in accordance with ing member 55 is preferably provided with trun the curvature of the guiding edge 83 of the tem nions 6| and 62 adapted to be mounted in bear m plet. ings 63 on the carriage whereby the cutting torch , In order to rotate the ring gear segment, the is supported for angular adjustment relative to a ñange 1 is provided with radial brackets 95 and transverse plane through the pipe to permit a 36, spaced apart a greater distance than the spac beveled edge to be formed on the cut edge of the ing between the ends of the ring gear and rotat pipe, said torch supporting member being held “ ably mounted therein are shafts 91 and 88 car 2,408,517 rying pinions QS-l Gü meshing with the ring gear, and sprockets ||J| and |92 that are operatively connected by a chain belt |53. One of the shafts is provided with a gear |64 which is driven by a pinion gear m5 iixedon a shaft |06 rotatably mounted in a bracket extension |01, the shaft |96 being manually rotated by means of a crank or the like |63. It is apparent that when the crank |08 is rotated the gear |05 drives the gear H14 to 6 arm 3l. The iiame from the cutting torches burns through the wall of the pipe so that when said torch has made one complete revolution about the pipe the proper cut has been made thereon. After the cut has been made the ring gear is moved so that the ends thereof align with the _sides of the throat in the track. The nut 8| is loosened to permit hinging of the lower portion of the templet away from the pipe and the toggle levers 3i! are released to permit re eiîect rotation of the pinion 99 and the pinion IED 10 moval of the retaining members |55 and |'| from through the sprocket and chain connection. Ro engagement with the saddle whereby the saddle tation of the pinion gears drives the ring gear to carrying the ring gear, torches and templet is carry the cutting torch about the periphery of the lifted from the pipe completing the operation. pipe to eiîect a cut having an edge depending From the foregoing it is apparent that I have upon the angular adjustment of the cutting torch. 15 provided a'cutting apparatus which may be read Owing to the fact that the ring gear is guidingly ily attached to a pipe without diassembling the supported by the track throughout its entire . ring gear or any part of the apparatus, and that movement andthe track is securely anchored to due to the positive mounting of the templet and the pipe, the out in the pipe formed by the cut the reciprocal mounting of the torch, the cuts 20 ting torch will be in a plane at right angles to the that arev produced in the pipes are smooth and axis of the pipe except where the templet guid regular and of the selected shapes for ñtting the ing edge 83 is so shaped to move said cutting end of the pipe to other pipes as in pipe fabrica torch and carriage therefor longitudinally of the tion. . pipe to make a selected cut therein so that the What I claim and desire to secure by Letters cut end of the pipe can be abutted against other 25 Patent is: pipe sections having suitable openings therein 1. In a pipe cutting apparatus, segmental ring to receive the pipe section on which the selected and track members having ends spaced apart to shape is cut. ` pass the members over a pipe to be cut, a saddle The radial brackets 95 and 96 are preferably supporting the track member, means on the 30 `braced by a link |09 secured to ears thereon to saddle having engagement with the pipe for po provide a sturdy mounting for the gear rotating sitioning the axis of the track member concen mechanism. ' - In using a cutting apparatus constructed and tric with the axis of the pipe, clamping means Y for securing the saddle to the pipe, a pair of assembled as described, the nut 9| is loosened on driving members supported in ñxed relation to 35 the screw 81 whereby said screw may be hinged the saddle and having driving contact with the outwardly away from the ear 90 to permit hing segmental ring for moving the ring member on ing of the lower portion of theV templet away from the track member, means on the ring member the upper portion thereof which is secured to the for mounting an instrument for movement lon saddle 2 and segmental plates 26 and 2|, The gitudinally of the pipe, a templet about the pipe retaining members I6 and I1 are then released 40 adapted to ñt against one side of said segmental from the saddle to permit the saddle and templet track and provided with a guiding edge, a tem to be applied to the upper portion of a pipe and clamped thereon adjacent the point at which the cut is to be made, the spacing feet having been adjusted to concentrically align the axis of the saddle with that of the pipe so that the ring plet follower operatively engaged with the in strument and movable toward the pipe, a ñange on the follower for engagement with the templet for limiting movement of said follower toward the pipe, and means for resiliently urging said templet follower to engage with the templet for controlling the cut of the pipe in accordance with gear 33 will be rotated about the axis of the pipe when the cut is being made. .After the saddle has been adjusted to the size of the pipe it is not again necessary to adjust the spacing feet unless 50 the shape of the templet. » 2. In a pipe cutting apparatus, a ring-like it is desired to cut a pipe of different diameter, driven member, means for supporting the driven however, the templet must be changed according member for rotation coaxially of a pipe, means to the particular type of cut, i. e., saddles, bevels, fixed to the driven member for moving an in et cetera, that is desired to be made in the pipe. When the saddle is applied to the pipe, the open 55 strument over the pipe, driving means for the driven member for rotating the driven member - ing between the ends of the ring gear will have to about the axis of the pipe to effect planetation be aligned with the throat of the track to permit of the instrument moving means, aìcarrier slid mounting of the saddle on the pipe, but when able on the instrument moving means longitudi the ring gear is rotated the ends thereof will move nally of the axis of the pipe, a templet carried in guided relation across the throat of the track by the driven member'supporting means and and be retained by the track for rotation about having a guiding edge encircling the pipe coax the pipe. ially therewith, a roller movably mounted on the The angularity of the cutting torch is adjust carrier for engaging the guiding edge of the ed in the carriage 41 so the nozzle 5l of said cut templet, resilient means urging the roller to ting torch is directed to the proper angle to make ward the pipe, a ñange on the roller for engag the desired bevel on the cut. The tension of the ing the templet for limiting the movement of the springs B9 holds the follower roller '|'| in engage roller toward the pipe, and a spring connected ment with the guiding edge 83 of the templet with the carrier for urging the carrier in a di whereby rotation of the crank |08 effects a grad 70 rection to retain said roller in guided engage ual planetation of the arm 31 about the pipe. The guiding edge 83 of the templet effects longi tudinal movement of the carriage 41 on thel roll ers 46 in the track formed by the angles of the ment with said guiding edge during planetation of the instrument moving means. POSY A. HOWARD.