Pipe beveling machine

Claim 2

A pipe beveling apparatus comprising: a. an elongate band encircling a pipe, said band having an elongate track extending longitudinally between opposite ends of said band and circumferentially of the pipe, said band having overlapping ends; b. said track being a rib extending upwardly from an upper surface of said band and said rib having an upwardly directed recess extending thereinto from the lower surface of said band whereby said upwardly extending rib on one end of said band interengages with said inwardly directed recess on the other end of said band thereby circumferentially aligning said track; c. means connected to the band and operative to draw same into clamping engagement with said pipe with said track extending continuously circumferentially around the pipe; d. a carriage having wheel means for rolling movement circumferentially around said pipe; e. said wheel means including a pair of tandem circumferentially spaced rotatably mounted wheels each having grooved rims for engaging said rib, and a rotatably mounted support wheel spaced laterally of said tandem wheels; f. an endless flexible member encircling said band; g. power means mounted on said carriagE and having a driven member with said flexible member extending over and engaging same, means tensioning said flexible member around the band driven member, said power means being operative to rotate said driven member and drive said carriage around said pipe through engagement with said flexible member; and h. torch supporting means mounted on said carriage for positioning a cutting torch at a uniform radial distance outwardly from the exterior of said pipe and at an angular position relative to the longitudinal axis of said pipe.

Claim 3

The pipe beveling apparatus as set forth in claim 1 wherein said carriage includes: a. an elongate frame having said tandem wheels and said support wheel rotatably mounted thereon, b. an elongate platform having one end adjustably mounted on said frame; and c. an adjustment device mounted on the other end of said platform and having a movable plunger with one end engaged with said frame operative to position said platform selected angular relation with said frame.

Claim 4

Apparatus for beveling ends of metal pipe, said apparatus comprising: a. an elongate band encircling a pipe, said band having a plurality of laterally spaced longitudinal ribs extending upwardly from an exterior surface of said band with each rib having a recess extending upwardly into said respective rib from an interior surface of said band, said band having overlapping ends whereby said ribs interengage with respective recesses thereby forming circumferentially aligned tracks encircling said band and said pipe; b. a clamping device having a first portion mounted on one end of said band and a second portion mounted on the other end of said band, said first portion of said clamping device being adjustable and interengageable with said second portion to effect clamping engagement between said band and said pipe; c. a carriage having an elongate frame with circumferentially spaced rotatably mounted tandem wheels each having grooved rims for engaging one of said ribs, said carriage frame having at least one rotatably mounted support wheel laterally spaced from said tandem wheels, d. an endless chain having a diameter substantially greater than the diameter of said band, said chain encircling said band; e. a plurality of circumferentially spaced guide members mounted on said band for positioning said chain relative to opposed edges of said band; f. power means mounted on said carriage and engageable with said chain, said power means being operative to drive said carriage around said pipe through engagement with said chain, said power means having a drive shaft extending outwardly therefrom, said drive shaft having a drive sprocket wheel mounted on said shaft, said sprocket wheel engaging said chain whereby said carriage travels circumferentially around said band; and g. a torch rack mounted on said carriage frame for positioning a cutting torch at a uniform radial distance outwardly from the exterior of said pipe, said torch rack having a pivotally mounted torch holding member and fastening means for securing said torch holding member at a selected angular position relative to the longitudinal axis of said pipe whereby an angle of bevel is adjustable.

Claim 5

Apparatus for beveling ends of metal pipe, said apparatus comprising: a. an elongate band encircling a pipe, said band having a plurality of laterally spaced longitudinal ribs extending upwardly from an exterior surface of said band with each rib having a recess extending upwardly into said respective rib from an interior surface of said band, said band having overlapping ends whereby said ribs interengage with respective recesses thereby forming circumferentially aligned tracks encircling said band and said pipe; b. a clamping device having a first portion mounted on one end of said band and a second portion mounted on the other end of said band, said first portion of said clamping device being adjustable and interengageable with said second portion to effect clamping engagement between said band and said pipe; c. a carriage having an elongate frame with circumferentially spaced rotatably mounted tandem wheels each having grooved rims for engaging one of said ribs, said carriage frame having at least one rotatably mounted support wheel laterally spaced from said tandem wheels, d. an endless chain having a diameter substantially greater than the diameter of said band, said chain encircling said band; e. a plurality of circumferentially spaced guide members mounted on said band for positioning said chain relative to opposed edges of said band; f. power means mounted on said carriage and engageable with said chain, said power means being operative to drive said carriage around said pipe through engagement with said chain, said power means having a drive shaft extending outwardly therefrom, said drive shaft having a drive sprocket wheel mounted on said shaft, said sprocket wheel engaging said chain whereby said carriage travels circumferentially around said band; and g. a torch rack mounted on said carriage frame for positioning a cutting torch at a uniform radial distance outwardly from the exterior of said pipe, said torch rack having a pivotally mounted torch holding member and fastening means for securing said torch holding member at a selected angular position relative to the longitudinal axis of said pipe whereby an angle of bevel is adjustable.

Claim 6

The machine for beveling ends of metal pipe as set forth in claim 3 including: a. an elongate platform having one end pivotally mounted on said carriage frame; b. an internally threaded sleeve extending upwardly from said platform at the other end thereof, said sleeve having an elongate shaft threadedly engaged therein with one end of said shaft engageable with a plunger, said plunger being engageable with said carriage frame; and c. a handle mounted on the other end of said shaft for rotating said shaft in said sleeve whereby tension is adjusted in said chain by rotating said handle thereby adjusting the position of said sprocket wheel relative to said carriage frame.