Tool for enlarging the bore in a workpiece

Claim 3

A device according to claim 1 wherein means are included for pivotally mounting said handle on said plate.

Claim 4

A device according to claim 2 wherein said slot is arcuate whereby said cutting tool receiving means traverses an arcuate path when moving to a position against the surface of the bore that is to be enlarged, the arcuate path of said cutting tool receiving means having a single, constant radius emanating from the rotational axis of said pivotal mounting means for said handle.

Claim 5

A device according to claim 1 wherein said plate includes integral stop means and said handle includes abutment means cooperating with said stop means for limiting the movement of said cutting tool receiving means in a direction towards the surface of the bore that is to be enlarged.

Claim 6

A device according to claim 4 wherein said abutment means is adjustably mounted on said handle.

Claim 7

A device according to claim 4 wherein said adjustment means is threaded into said handle and is thereby adjustable relative to said stop means whereby the position representing the limit of movement of said cutting tool receiving means, in a direction towards the surface of the bore that is to be enlarged, may be varied.

Claim 8

A device according to claim 1 further including retaining means for holding the plate on said collar means.

Claim 9

A device according to claim 7 further including fastener means for securing said retaining means to said collar means, said retaining means in combination with said collar means defining a channel for receiving a peripheral portion of said plate.

Claim 10

A device according to claim 8 wherein said collar means includes locating means cooperating with a surface of the workpiece for positioning said plate relative to the bore in the workpiece.

Claim 11

A device according to claim 9 wherein said collar means is a ring and said locating means comprises a lip extending inwardly from the inside surface thereof, said lip being arranged to abut the transverse end surface of the workpiece when the inside surface of said ring is closely adjacent the outside surface of the workpiece.

Claim 12

A device according to claim 9 wherein said collar means is a ring and wherein said locating means comprises a removable adapter sleeve sized to fit intermediate the inside surface of said ring and the outside surface of the workpiece, said adapter sleeve including first interfitting means for engaging a portion of said ring and second interfitting means for engaging a portion of the workpiece.

Claim 13

A device according to claim 11 wherein said first interfitting means comprises a radially inwardly extending lip on said ring and a cooperating seat on the outside surface of said adapter sleeve, said second interfitting means comprising a radially inwardly extending lip on said adapter sleeve that is arranged to engage the transverse end face of the workpiece.

Claim 14

A device according to claim 1 wherein said cutting tool receiving means comprises a housing, means for securing said housing to said plate for movement together therewith and means for supporting a cutting tool in said housing for rotation relative thereto.

Claim 15

A device according to claim 13 wherein said means for supporting the cutting tool for rotation relative to said housing comprises bearing means.

Claim 16

A device according to claim 13 wherein there is further included adjustment means for axially varying the position of the cutting tool with respect to the workpiece.

Claim 17

A device according to claim 15 wherein said adjustment means comprises fastener means for releasably securing said housing to said plate.

Claim 18

Cutting apparatus for at least partially removing a first tubular member that is rigidly secured internally of a second tubular member, said apparatus comprising: a collar; means for non-rotatably securing said collar to the second tubular member; a plate rotatably mounted on said collar, said plate including an arcuate, elongated slot therethrough with one end of said slot terminating proximate the center of said plate and with the other end of said slot terminating proximate the periphery of said plate; a handle pivotally mounted on said plate, the pivot axis of said handle defining the radius of said arcuate slot, said handle being further arranged to rotate said plate about the longitudinal axis of the first tubular member; and a cutting tool receiving housing slidably received in said slot and coupled to said handle, said housing being arranged for movement along the length of said slot by said handle, said housing being further arranged to be rotated by said plate about the longitudinal axis of the first tubular member when said plate is rotated by said handle, said housing being on the same radius as said slot with respect to the pivot axis of said handle whereby the cutting tool extends through said slot and is arranged to be brought into cutting engagement with the inside surface of the first tubular member when said housing is moved through said slot by said handle.

Claim 19

Cutting apparatus for at least partially removing a first tubular member that is rigidly secured internally of a second tubular member, said apparatus comprising: a collar; means for non-rotatably securing said collar to the second tubular member; a plate rotatably mounted on said collar, said plate including an arcuate, elongated slot therethrough with one end of said slot terminating proximate the center of said plate and with the other end of said slot terminating proximate the periphery of said plate; a handle pivotally mounted on said plate, the pivot axis of said handle defining the radius of said arcuate slot, said handle being further arranged to rotate said plate about the longitudinal axis of the first tubular member; and a cutting tool receiving housing slidably received in said slot and coupled to said handle, said housing being arranged for movement along the length of said slot by said handle, said housing being further arranged to be rotated by said plate about the longitudinal axis of the first tubular member when said plate is rotated by said handle, said housing being on the same radius as said slot with respect to the pivot axis of said handle whereby the cutting tool extends through said slot and is arranged to be brought into cutting engagement with the inside surface of the first tubular member when said housing is moved through said slot by said handle.

Claim 20

Apparatus according to claim 17 further including means for limiting the pivotal movement of said handle in the direction of travel thereof whereby the position at which the cutting tool engages the inside surface of the first tubular member may be accurately determined.

Claim 21

Apparatus according to claim 18 wherein said limiting means comprises a projection extending from said plate into the path of said handle when said housing moves through said slot and an adjustable member secured to said handle and arranged to abut said projection at a position that corresponds to the desired position of the cutting tool.

Claim 22

Apparatus according to claim 19 wherein said adjustable member is in threaded mating engagement with said handle and is adapted to be axially displaced relative thereto.

Claim 23

Apparatus according to claim 17 wherein means are included for rotatably receiving the cutting tool in said housing.

Claim 24

Apparatus according to claim 17 wherein means are included for axially adjusting the position of the cutting tool relative to said housing.