Portable pipe machining tool

A method of operating a parting tool assembly of a portable pipe machining tool to progressively cut a pipe with ends without requiring access to the ends of the pipe, comprising the steps of:

• a) grabbing a first pin of a flat and elongated arm of a engagement assembly of said parting tool assembly in one hand of a user;
• b) grabbing a flat and circular-shaped disk of said engagement assembly in another hand of the user;
• c) rotating said flat and circular-shaped disk;
• d) causing a cammed part of a distal surface of said flat and circular-shaped disk to ride along a cammed proximal end of a rotatable and cylindrically-shaped cam part of said engagement assembly, until flats of said cammed part abut against, for rotation with, flats of said cammed proximal end of said cylindrically-shaped cam part;
• e) causing a second pin of said flat and elongated arm to leave an arcuate-shaped throughslot in said flat and circular-shaped disk;
• f) causing said rotatable and cylindrically-shaped cam part to separate from said cammed part of said flat and circular-shaped disk, against biasing of a first spring of said engagement assembly and against biasing of a second spring of said engagement assembly;
• g) causing said first spring to compress;
• h) causing said second spring to compress;
• i) causing a serrated distal end of said rotatable and cylindrically-shaped clutch part to engage, for rotation with, a serrated proximal end of a fixed and cylindrically-shaped clutch part of said engagement assembly, so that said parting tool assembly is now engaged and ready to progressively cut the pipe;
• j) rotating a rotatable cylindrically-shaped frame of said portable pipe machining tool relative to a fixed cylindrically-shaped frame of said portable pipe machining tool;
• k) causing a first gear of said parting tool assembly to rotate, by virtue of its rotative engagement with gear teeth in a circumferentially-disposed track in a circular-shaped and open distal end of said fixed cylindrically-shaped frame;
• l) causing a second gear of said parting tool assembly to rotate, by virtue of its rotative engagement with said first gear;
• m) causing an eccentric of said parting tool assembly to rotate, by virtue of it being fixedly attached to said second gear;
• n) causing a reciprocating rod of said parting tool assembly to reciprocate in an elongated, slender, and cylindrically-shaped guide bore in a rectangular-parallelepiped-shaped housing of said parting tool assembly, by virtue of it being pivotally mounted at one end to said eccentric;
• o) causing a reciprocating block of said parting tool assembly to reciprocate in a cubic-shaped internal chamber in said rectangular-parallelepiped-shaped housing, by virtue of it being pivotally attached to another end of said reciprocating rod;
• p) causing a pin of said reciprocating block to reciprocate in said cubic-shaped internal chamber, by virtue of it being attached to said reciprocating block;
• q) causing a cylindrically-shaped collar of said parting tool assembly to reciprocate in a centrally-disposed and cylindrically-shaped longitudinal throughbore in said rectangular-parallelepiped-shaped housing of said parting tool assembly, by virtue of a threaded yoke of said parting tool assembly threadably engaging a radially-oriented and threaded bore in a cylindrically-shaped outer surface of said cylindrically-shaped collar which is pivotally mounted to said pin of said reciprocating block by a pivot pin;
• r) causing said rotatable and cylindrically-shaped clutch part to rotate, via reciprocating movement of said cylindrically-shaped collar, by virtue of a plunger of a resistance assembly of said parting tool assembly being biased, by a spring of said resistance assembly, against said cylindrically-shaped clutch part and thereby preventing said rotatable and cylindrically-shaped clutch part from rotating back and reciprocating with said cylindrically-shaped collar as a ratchet surface on a cylindrically-shaped inner surface of said cylindrically-shaped collar reciprocates;
• s) causing said fixed and cylindrically-shaped clutch part to rotate, by virtue of its engagement with said rotatable and cylindrically-shaped clutch part;
• t) causing an elongated, slender, and cylindrically-shaped shaft of said parting tool assembly to rotate, by virtue of it being fixedly attached to said fixed and cylindrically-shaped clutch part;
• u) causing an end gear on a distal end of said elongated, slender, and cylindrically-shaped shaft to rotate, by virtue of it being fixedly attached to said elongated, slender, and cylindrically-shaped shaft;
• v) causing a large gear of said parting tool assembly to rotate, by virtue of its rotatable engagement with said gear on said distal end of said elongated, slender, and cylindrically-shaped shaft;
• w) causing a gear shaft of said parting tool assembly to rotate, by virtue of it being fixedly attached to said large gear;
• x) causing a small gear of said parting tool assembly to rotate, by virtue of it being fixedly attached to said gear shaft;
• y) causing a rack gear of said parting tool assembly to traverse radially inwardly, by virtue of its engagement with said small gear;
• z) causing a generally trapezoidal-shaped upper cover of said parting tool assembly to slide radially along a rectangular-shaped and T-shape in profile intermediate plate of said parting tool assembly, by virtue of it being fixedly attached to said rack gear and having a T-shaped track thereacross that slidingly engages said rectangular-shaped and T-shape in profile intermediate plate;
• aa) causing a parting tool bit of said parting tool assembly to move radially inwardly, by virtue of it being fixedly attached to said generally trapezoidal-shaped upper cover;
• bb) causing a wide portion of a cylindrically-shaped release assembly of said parting tool assembly to move radially outwardly in an elongated and slender stop recess in said trapezoidal-shaped upper cover, against biasing of a spring of said cylindrically-shaped release assembly, until said wide portion of said cylindrically-shaped release assembly reaches a tapered portion therein;
• cc) causing said wide portion of said cylindrically-shaped release assembly to move, against said biasing of said spring of said cylindrically-shaped release assembly;
• dd) causing said spring of said cylindrically-shaped release assembly to compress;
• ee) causing a narrow portion of said cylindrically-shaped release assembly to extend past a throughbore in a rectangular-shaped upper cover of said rectangular-parallelepiped-shaped housing;
• ff) causing said narrow portion of said cylindrically-shaped release assembly to obstruct said flat and elongated arm, and stop its rotation;
• gg) causing said flats of said cammed part of said distal surface of said flat and circular-shaped disk to ride along said flats of said cammed proximal end of said rotatable and cylindrically-shaped cam part;
• hh) causing said cammed part of said distal surface of said flat and circular-shaped disk to engage said cammed proximal end of said rotatable and cylindrically-shaped cam part;
• ii) causing said second pin of said flat and elongated arm to enter said arcuate-shaped throughslot in said flat and circular-shaped disk;
• jj) causing said second spring of said parting tool assembly to expand;
• kk) causing said first spring of said parting tool assembly to expand;
• and
• ll) causing said serrated distal end of said rotatable and cylindrically-shaped clutch part to disengage from said serrated proximal end of said fixed and cylindrically-shaped clutch part, by virtue of said first spring of said parting tool assembly expanding, so that said parting tool assembly is now disengaged and the pipe has been progressively cut.

A method of operating a scrapping and finishing tool assembly of a portable pipe machining tool to scrap and finish a longitudinal outer surface of a pipe with ends without requiring access to the ends of the pipe, comprising the steps of:

• a) loosening a pair of wing nuts of a scrapping and finishing tool bit assembly of said scrapping and finishing tool assembly;
• b) rotating a crank of said scrapping and finishing tool bit assembly;
• c) causing a crank gear of said scrapping and finishing tool bit assembly to rotate, by virtue of it being fixedly attached to said crank;
• d) causing a generally rectangular-parallelepiped-shaped body of said scrapping and finishing tool bit assembly to move radially inwardly on a rectangular-shaped and T-shape in profile plate of said scrapping and finishing tool assembly, by virtue of a rack gear of said scrapping and finishing tool bit assembly being fixedly attached to said generally rectangular-parallelepiped-shaped body which in turn engages said crank gear, until a guide roller of said scrapping and finishing tool bit assembly contacts the longitudinal outer surface of the pipe and a generally square-shaped scrapping and finishing tool bit of said scrapping and finishing tool bit assembly pierces the longitudinal outer surface of the pipe, by virtue of it extending slightly past said guide roller;
• e) tightening said pair of wing nuts so as to secure said scrapping and finishing tool bit assembly to said rectangular-shaped and T-shape in profile plate;
• f) grabbing a first pin of a flat and elongated arm of an engagement assembly of said scrapping and finishing tool assembly in one hand of a user;
• g) grabbing a flat and circular-shaped disk of said engagement assembly in another hand of the user;
• h) rotating said flat and circular-shaped disc;
• i) causing a cammed part of a distal surface of said flat and circular-shaped disk to ride along a cammed proximal end of a rotatable and cylindrically-shaped cam part of said engagement assembly, until flats of said cammed part abut against, for rotation with, flats of said cammed proximal end of said rotatable and cylindrically-shaped cam part;
• j) causing a second pin of said flat and elongated arm to leave an arcuate-shaped throughslot in said flat and circular-shaped disk;
• k) causing said cammed proximal end of said rotatable and cylindrically-shaped cam part to separate from said cammed part of said distal surface of said flat and circular-shaped disk, against biasing of a first spring OL said engagement assembly and against biasing of a second spring of said engagement assembly;
• l) causing said first spring to compress;
• m) causing said second spring to compress;
• n) causing a flat distal end of said rotatable and cylindrically-shaped cam part to abut against, for rotation with, a flat proximal end of a rotatable and cylindrically-shaped clutch part of said engagement assembly;
• o) causing a serrated distal end of said rotatable and cylindrically-shaped clutch part to engage, for rotation with, a serrated proximal end of a fixed and cylindrically-shaped clutch part of said engagement assembly, so that the scrapping and finishing tool assembly is engaged;
• p) rotating a rotatable cylindrically-shaped frame of said portable pipe machining tool relative to a fixed cylindrically-shaped frame of said portable pipe machining tool;
• q) causing a first gear of said scrapping and finishing tool assembly to rotate, by virtue of its rotative engagement with gear teeth in a circumferentially-disposed track in a circular-shaped and open distal end of said fixed cylindrically-shaped frame;
• r) causing a second gear of said scrapping and finishing tool assembly to rotate, by virtue of its rotative engagement with said first gear;
• s) causing an eccentric of said scrapping and finishing tool assembly to rotate, by virtue of it being fixedly attached to said second gear;
• t) causing a reciprocating rod of said scrapping and finishing tool assembly to reciprocate in a space in said scrapping and finishing tool assembly, by virtue of it being pivotally mounted at one end to said eccentric;
• u) causing a reciprocating flat arm of said scrapping and finishing tool assembly to reciprocate in said space in said scrapping and finishing tool assembly, by virtue of it being pivotally attached to another end of said reciprocating rod;
• v) causing a tab of said scrapping and finishing tool assembly to reciprocate in said space in said scrapping and finishing tool assembly, by virtue it being pivotally attached to said reciprocating flat arm;
• w) causing a cylindrically-shaped collar of said scrapping and finishing tool assembly to reciprocate in a centrally-disposed and cylindrically-shaped longitudinal throughbore in a rectangular-parallelepiped-shaped housing of said scrapping and finishing tool assembly, by virtue of it being attached to said tab of said scrapping and finishing tool assembly;
• x) causing said rotatable and cylindrically-shaped clutch part to rotate, via reciprocating movement of said cylindrically-shaped collar, by virtue of a plunger of a resistance assembly of said scrapping and finishing tool assembly being biased, by a spring of said resistance assembly, against said rotatable and cylindrically-shaped clutch part and thereby preventing said rotatable and cylindrically-shaped clutch part from reciprocating with said cylindrically-shaped collar as a ratchet surface on a cylindrically-shaped inner surface of said cylindrically-shaped collar reciprocates;
• y) causing a fixed and cylindrically-shaped clutch part of said engagement assembly to rotate, by virtue of its engagement with said rotatable and cylindrically-shaped clutch part of said engagement assembly;
• z) causing a threaded distal portion of an elongated, slender, and cylindrically-shaped shaft of said engagement assembly to rotate, by virtue of it being fixedly attached to said fixed and cylindrically-shaped clutch part;
• aa) causing a collar of said rectangular-shaped and T-shape in profile plate to thread along said threaded distal portion of said elongated, slender, and cylindrically-shaped shaft, by virtue of it threadably receiving said threaded distal portion of said elongated, slender, and cylindrically-shaped shaft, and slide longitudinally in a narrow and rectangular-parallelepiped-shaped recess in said rectangular-parallelepiped-shaped housing, by virtue of it being longitudinally slidably mounted in said narrow and rectangular-parallelepiped-shaped recess in said rectangular-parallelepiped-shaped housing;
• bb) causing said rectangular-shaped and T-shape in profile plate to slide longitudinally in a wide and rectangular-parallelepiped-shaped recess in said rectangular-parallelepiped-shaped housing, by virtue of it being fixedly attached to said collar of said rectangular-shaped and T-shape in profile plate and being longitudinally slidable in said wide and rectangular-parallelepiped-shaped recess in said rectangular-parallelepiped-shaped housing;
• cc) causing said scrapping and finishing tool bit assembly to slide longitudinally in said wide and rectangular-parallelepiped-shaped recess in said rectangular-parallelepiped-shaped housing, by virtue of it being secured to said rectangular-shaped and T-shape in profile plate;
• dd) causing a guide roller of said scrapping and finishing tool bit assembly to move longitudinally and roll along the longitudinal outer surface of the pipe, by virtue of it being rotatably mounted in a tool bit head of said scrapping and finishing tool bit assembly;
• ee) causing a generally square-shaped scrapping and finishing tool bit of said scrapping and finishing tool bit assembly to move longitudinally and rotate and scrap and finish the longitudinal outer surface of the pipe, by virtue of it being rotatably mounted in said tool bit head of said tool bit assembly of said scrapping and finishing tool assembly, until said generally rectangular-parallelepiped-shaped body contacts a cylindrically-shaped rod of a release assembly;
• ff) causing said cylindrically-shaped rod to move longitudinally in a elongated, slender, and cylindrically-shaped guide bore in said rectangular-parallelepiped-shaped housing and to move longitudinally in a corner longitudinal throughbore in a rectangular-shaped plate of said scrapping and finishing tool assembly, and extend past said rectangular-shaped plate, against the biasing of a spring of said release assembly;
• gg) causing said spring of said release assembly to compress;
• hh) causing said cylindrically-shaped rod of said release assembly to obstruct said flat and elongated arm, and stop its rotation;
• ii) causing said flats of said cammed part of said distal surface of said flat and circular-shaped disk to ride along said flats of said cammed proximal end of said rotatable and cylindrically-shaped cam part;
• jj) causing said cammed part of said distal surface of said flat and circular-shaped disk to engage said cammed proximal end of said rotatable and cylindrically-shaped cam part;
• kk) causing said second pin of said flat and elongated arm to enter said arcuate-shaped throughslot in said flat and circular-shaped disk;
• ll) causing said second spring to expand;
• mm) causing said first spring to expand;
• and
• nn) causing said serrated distal end of said rotatable and cylindrically-shaped clutch part to disengage from said proximal end of said fixed and cylindrically-shaped clutch part, by virtue of the first spring expanding, so that said scrapping and finishing tool assembly is disengaged and the longitudinal outer surface of the pipe is scrapped and finished.

A method of selectively simultaneously cutting a pipe and scraping and finishing a longitudinal outer surface of the pipe that has a pair of ends without requiring access to the pair of ends of the pipe, comprising the step of selectively simultaneously cutting the pipe and scraping and finishing the longitudinal outer surface of the pipe with a portable pipe machining tool which comprises:

• a) a fixed cylindrically-shaped frame fixedly attachable to a portion of the pipe and having a circular-shaped and open distal end with a circumferentially-disposed track disposed circumferentially therearound, a first semi-cylindrically-shaped portion, and a second semi-cylindrically-shaped portion being pivotally mounted to said first semi-cylindrically-shaped portion of said fixed cylindrically-shaped frame;
• said circumferentially-disposed track in said circular-shaped and open distal end of said fixed cylindrically-shaped frame having gear teeth disposed circumferentially therearound and extending longitudinally therein;
• b) fixed frame pivoting means for pivotally mounting said second semi-cylindrically-shaped of said fixed cylindrically-shaped frame to said first semi-cylindrically-shaped portion of said fixed cylindrically-shaped frame and allowing said fixed cylindrically-shaped frame to have an open position where said fixed cylindrically-shaped frame is placable around the pipe without having to have an end of the pipe accessible and a closed portion where said fixed cylindrically-shaped frame is fixedly abutted against, and supported only by, the pipe;
• c) fixed frame securing means for selectively maintaining said fixed cylindrically-shaped frame in said closed position;
• d) a rotatable cylindrically-shaped frame rotatably attachable to an adjacent portion of the pipe and rotatably connected to said fixed cylindrically-shaped frame and having a first semi-cylindrically-shaped portion, a second semi-cylindrically-shaped portion being pivotally mounted to said first semi-cylindrically-shaped portion of said rotatable cylindrically-shaped frame, and a circular-shaped and open proximal end with a collar disposed circumferentially therearound and extending longitudinally outwardly therefrom;
• e) a ring gear disposed circumferentially around, and extending coaxially and longitudinally from, said collar on said circular-shaped and open proximal end of said rotatable cylindrically-shaped frame;
• f) a track disposed circumferentially around, and extending coaxially and longitudinally from, said ring gear and having at least a portion thereof rotatably engaging said circumferentially-disposed track in said circular-shaped and open distal end of said fixed cylindrically-shaped frame so as to allow said rotatable cylindrically-shaped frame to rotate relative to said fixed cylindrically-shaped frame;
• g) rotatable frame pivoting means for pivotally mounting said second semi-cylindrically-shaped portion of said rotatable cylindrically-shaped frame to said first semi-cylindrically-shaped portion of said rotatable cylindrically-shaped frame and allowing said rotatable cylindrically-shaped frame to have an open position where said rotatable cylindrically-shaped frame is placable around the adjacent portion of the pipe without having to have an end of the pipe accessible and a closed portion where said rotatable cylindrically-shaped frame is rotatably abutted against, and supported only by, the adjacent portion of the pipe;
• h) rotatable frame securing means for selectively maintaining said rotatable cylindrically-shaped frame in said closed position;
• i) a parting tool assembly extending radially along said first semi-cylindrically-shaped portion of said rotatable cylindrically-shaped frame and being selectively engagable and disengagable, and when engaged having a portion thereof moving radially inwardly through said first semi-cylindrically-shaped portion of said rotatable cylindrically-shaped frame and progressively cutting into the adjacent portion of the pipe as said rotatable cylindrically-shaped frame rotates relative to said fixed cylindrically-shaped frame until the pipe has been cut;
• and
• j) a scrapping and finishing tool assembly extending radially along said second semi-cylindrically-shaped portion of said rotatable cylindrically-shaped frame, diametrically opposing said parting tool assembly, and being selectively engagable and disengagable, and when engaged having a portion thereof moving longitudinally through said second semi-cylindrically-shaped portion of said rotatable cylindrically-shaped frame and longitudinally along the longitudinal outer surface of the adjacent portion of the pipe and scraping and finishing the longitudinal outer surface of the adjacent portion of the pipe as said rotatable cylindrically-shaped frame rotates relative to said fixed cylindrically-shaped frame so as to facilitate the bonding of the pipe, and being selectively simultaneously operable with said parting tool assembly if so desired, so as to cut, scrape, and finish the adjacent portion of the pipe simultaneously as said rotatable cylindrically-shaped frame rotates relative to said fixed cylindrically-shaped frame.