Internally mounting pipe beveling machine

Claim 2

A pipe beveling machine comprising: a body having first and second end portions; an input shaft having a first end portion and a second end portion and having the first end portion thereof journaled in the first end portion of said body and having the second end portion thereof extending outwardly from the first end portion of said body; a supporting shaft having a first end portion and a second end portion and having the first end portion thereof journaled in the second end portion of said body and having the second end portion thereof extending outwardly from the second end portion of said body in coaxial alignment with said input shaft; securing means operatively engaging said supporting shaft for rigidly securing said supporting shaft to the inner periphery of a pipe to be beveled in substantial coaxial alignment with the longitudinal axis of the pipe; planetary gear train means journaled in said body and coupling said input shaft and said supporting shaft for rotating said body relative to said supporting shaft in response to rotation of said input shaft relative to said body; a tool post having an inner end portion and an outer end portion and slidably supported in said body for rotational movement therewith and linear translation relative thereto along a line substantially normal to the axis of said supporting shaft; a cutting tool fixedly secured to the outer end portion of said tool post; and means coupling said supporting shaft and said tool post for imparting linear translation to said tool post relative to said body in response to rotation of said body relative to said supporting shaft.

Claim 3

The pipe beveling machine as defined in claim 1 wherein said planetary gear train means is characterized further as rotating said body relative to said supporting shaft at an angular velocity less than the angular velocity of the rotation of said input shaft relative to said body.

Claim 4

A pipe beveling machine comprising: a body having first and second end portions; an input shaft having a first end portion and a second end portion and having the first end portion thereof journaled in the first end portion of said body and having the second end portion thereof extending longitudinally outwardly from the first end portion of said body; a supporting shaft having a first end portion and a second end portion and having the first end portion thereof journaled in the second end portion of said body and having the second end portion thereof extending longitudinally outwardly from the second end portion of said body in coaxial alignment with said input shaft; securing means operatively engaging said supporting shaft for rigidly securing said supporting shaft to the inner periphery of a pipe to be beveled in substantial coaxial alignment with the longitudinal axis of the pipe; a longitudinal shaft having a first end portion and a second end portion and journaled in said body in parallel alignment with said supporting shaft; a primary input gear formed on the first end portion of said input shaft; a primary follower gear formed on the first end portion of said longitudinal shaft and meshingly engaging said primary input gear; a secondary follower gear formed on the second end portion of said longitudinal shaft; a reaction gear formed on the first end portion of said supporting shaft and meshingly engaging said secondary follower gear; an idler gear journaled in said body and meshingly engaging said reaction gear; a longitudinal drive shaft having a first end portion and a second end portion and journaled in said body in parallel alignment with said supporting shaft; a drive gear formed on the first end portion of said longitudinal drive shaft and meshingly engaging said idler gear; a tool post having an inner end portion and an outer end portion and slidably supported in said body for rotation therewith and linear translation relative thereto along a line substantially normal to the axis of said supporting shaft; a cutting tool fixedly secured to the outer end portion of said tool post; and means interconnecting the second end portion of said longitudinal drive shaft and the inner end portion of said tool post for imparting linear translation to said tool post relative to said body in response to rotation of said body relative to said supporting shaft.

Claim 5

A pipe beveling machine comprising: a body having first and second end portions; an input shaft having a first end portion and a second end portion and having the first end portion thereof journaled in the first end portion of said body and having the second end portion thereof extending longitudinally outwardly from the first end portion of said body; a supporting shaft having a first end portion and a second end portion and having the first end portion thereof journaled in the second end portion of said body and having the second end portion thereof extending longitudinally outwardly from the second end portion of said body in coaxial alignment with said input shaft; securing means operatively engaging said supporting shaft for rigidly securing said supporting shaft to the inner periphery of a pipe to be beveled in substantial coaxial alignment with the longitudinal axis of the pipe; a longitudinal shaft having a first end portion and a second end portion and journaled in said body in parallel alignment with said supporting shaft; a primary input gear formed on the first end portion of said input shaft; a primary follower gear formed on the first end portion of said longitudinal shaft and meshingly engaging said primary input gear; a secondary follower gear formed on the second end portion of said longitudinal shaft; a reaction gear formed on the first end portion of said supporting shaft and meshingly engaging said secondary follower gear; an idler gear journaled in said body and meshingly engaging said reaction gear; a longitudinal drive shaft having a first end portion and a second end portion and journaled in said body in parallel alignment with said supporting shaft; a drive gear formed on the first end portion of said longitudinal drive shaft and meshingly engaging said idler gear; a tool post having an inner end portion and an outer end portion and slidably supported in said body for rotation therewith and linear translation relative thereto along a line substantially normal to the axis of said supporting shaft; a cutting tool fixedly secured to the outer end portion of said tool post; and means interconnecting the second end portion of said longitudinal drive shaft and the inner end portion of said tool post for imparting linear translation to said tool post relative to said body in response to rotation of said body relative to said supporting shaft.

Claim 6

The pipe beveling machine as defined in claim 3 characterized further to include: at least one additional longitudinal shaft having a first end portion and a second end portion and journaled in said body in parallel alignment with said input shaft and said supporting shaft; a primary follower gear formed on the first end portion of each additional longitudinal shaft and meshingly engaging said primary input gear; and a secondary follower gear formed on the second end portion of each additional longitudinal shaft and meshingly engaging said reaction gear.

Claim 7

The pipe beveling machine as defined in claim 3 wherein said means interconnecting said longitudinal drive shaft and said tool post is characterized further to include: a threaded shaft extending from the inner end portion of said tool post along a line substantially normal to the axis of said supporting shaft. a threaded member journaled in said body coaxial with said threaded shaft and threadedly engaging said threaded shaft; a worm gear journaled in said body coaxial with said threaded shaft; means coupling said worm gear and said threaded member for providing rigid engagement therebetwEen; and a worm formed on the second end portion of said drive shaft and meshingly engaging said worm gear.

Claim 8

The pipe beveling machine as defined in claim 3 wherein: said primary input gear includes a lesser number of teeth than said primary follower gear; and said secondary follower gear includes a lesser number of teeth than said reaction gear.

Claim 9

The pipe beveling machine as defined in claim 3 wherein said tool post is characterized further as being non-circular in cross-section and being slidably disposed in a non-circular channel formed in said body and conforming to the cross-sectional shape of said tool post.

Claim 10

The pipe beveling machine as defined in claim 3 wherein said securing means is characterized further to include: a first polygonal member formed on said supporting shaft adjacent to said body, said polygonal member including a plurality of planar surfaces formed on periphery thereof with each planar surface being parallel to and perpendicularly equidistant from the longitudinal axis of said supporting shaft; a second polygonal member formed on said supporting shaft distal from said body, said second polygonal member including the same number of planar surfaces formed on the periphery thereof as said first polygonal member, with each planar surface thereof being parallel to and perpendicularly equidistant from the longitudinal axis of said supporting shaft and coplanar with a corresponding planar surface on said first polygonal member; a plurality of elongated cylindrically shaped members disposed about the peripheries of said first and second polygonal members and extending therebetween in parallel alignment with the axis of said supporting shaft, each cylindrically shaped member being in rolling contact with a respective pair of coplanar surfaces of said first and second polygonal members; and resilient means for retaining said plurality of cylindrically shaped members in rolling contact with the respective coplanar surfaces of said first and second polygonal members.