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US 6,220,130 B1Granted
Pipe machining apparatus
OwnerLane D. Beakleyinventor
Life of this patent
Estimating the term…
Abstract
Apparatus for machining the ends of pipe, which has a clamping section insertable into a section of pipe for forcible engagement with the interior of the pipe in fixed coaxial alignment therewith and a cutting section which includes a cylindrical mast, attached to the clamping section for coaxial alignment therewith, and a cutting head assembly on which is carried one or more cutting tools. The cutting head assembly is mounted on the mast for rotation and axial movement relative thereto for moving cutting tools into and away from cutting engagement with an end of the pipe section. The apparatus cutting section mast is removably attached to the clamping section allowing removal and replacement of the clamping section.
Claims20
Apparatus for machining the ends of pipe, said apparatus comprising a clamping section and a cutting section;
- said clamping section being insertable into a section of pipe for forcible engagement with the interior of said pipe in fixed coaxial alignment therewith, said clamping section comprising a plurality of pipe engaging members disposed around said clamping section for radial movement between inward non-engaging positions and outward positions in which said pipe engaging members forcibly engage the interior of said pipe to place said clamping section in said fixed coaxial alignment therewith, said clamping section also comprising a power device operatively connected to said pipe engaging members for said movement thereof between said inward non-engaging positions and said outward engaging positions;
- said cutting section comprising a cylindrical mast, attached to said clamping section for coaxial alignment therewith and projection away from said pipe section, and a cutting head assembly on which is carried one or more cutting tools, said cutting head assembly being mounted on said mast for rotation and axial movement relative thereto for moving said one or more cutting tools into and away from cutting engagement with an end of said pipe section;
- said apparatus being further characterized in that said cutting section mast is removably attached to said clamping section allowing removal and replacement of said clamping section.
Apparatus for machining the ends of pipe, said apparatus comprising a clamping section and a cutting section;
- said clamping section being insertable into a section of pipe for forcible engagement with the interior of said pipe in fixed coaxial alignment therewith;
- said cutting section comprising a cylindrical mast, attached to said clamping section for coaxial alignment therewith and projection away from said pipe section, and a cutting head assembly on which is carried one or more cutting tools, said cutting head assembly being mounted on said mast for rotation and axial movement relative thereto for moving said one or more cutting tools into and away from cutting engagement with an end of said pipe section;
- said apparatus being further characterized in that said clamping section comprises an extendable and retractable power device coaxially mounted in said clamping section for extendable and retractable axial movement therein and at opposite ends of which are a pair of circular cylinder heads around each of which are provided a plurality of radially disposed cylinders in which are cylindrical shoes adapted for radial movement between inward nonengaging positions and outward positions in which distal ends of said shoes may engage the interior of said pipe, each of said shoes being pivotally attached at proximal ends thereof to one end of a link member, the other end of said link member being pivotally attached to one of a pair of spider members which are attached to opposite ends of said extendable and retractable power device, said spider members being moveable between close spaced positions and further spaced positions in response to said extendable and retractable axial movement of said power device, each of said link members being in inclined positions when said spider members are in close spaced positions so that said cylindrical shoes are in said inward nonengaging positions, each of said link members being in substantially less inclined positions when said spider members are in said further spaced positions so that said cylindrical shoes are in said outward positions for placing said clamping section in said forcible engagement with the interior of said pipe.
Apparatus for machining the ends of pipe, said apparatus comprising a clamping section and a cutting section;
- said clamping section being insertable into a section of pipe for forcible engagement with the interior of said pipe in fixed coaxial alignment therewith;
- said cutting section comprising a cylindrical mast attached to said clamping section for coaxial alignment therewith and projection away from said pipe section, and a cutting head assembly on which is carried one or more cutting tools, said cutting head assembly being mounted on said mast for rotation and axial movement relative thereto for moving said one or more cutting tools into and away from cutting engagement with an end of said pipe section;
- said apparatus being further characterized in that said cutting head assembly comprises a tubular hub surrounding said cylindrical mast, one end of said hub being concentrically affixed to a gear member engageable by a drive gear attached to a rotating power device for said rotation of said cutting head assembly, the opposite end of said tubular hub being concentrically affixed to a circular face plate member on which said one or more cutting tools is carried for cutting engagement with said end of said pipe section, each of said one or more cutting tools being provided by a cutting tool assembly which includes a mounting plate by which said cutting tool assembly is attached to said face plate member, a radial arm attached to said mounting plate by a pivot connection and to which said cutting tool is removably attached, and a guide roller affixed to said radial arm for engagement with the interior of said pipe section to guide said cutting tool for said cutting engagement with said end of said pipe section, one of said face plate and said tool assembly mounting plate being provided with an elongated slide groove and the other of which is provided with a cooperating slide, allowing said tool assembly and said cutting tool attached thereto to be radially positioned on said face plate for cutting pipe sections of differing diameters.
Dependencies are inferred from the claim text.