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US 4,218,164 AGranted
Apparatus and method for perforating tubing
OwnerGerd P. H. Lupke, Manfred A. A. Lupkeinventors
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OwnerGerd P. H. Lupke, Manfred A. A. Lupkeinventors
Estimating the term…
Corrugated tubing is advanced along its axial path by rotatably driven lead screw members the screw threading of which is in meshing engagement with the corrugations of the tubing, the lead screw members being in pairs with the screw threading of the members of each pair being of opposite hand and the lead screw members each pair being rotated in opposite directions. The lead screw members of each pair present outwardly directed cutters which are synchronized substantially simultaneously to intersect the tubing thereby, in perforating the tubing, to restrain the tubing against rotation thereof about the axial path. A slide member is preferably slidably and non-rotatably mounted by a splined connection on each lead screw member with the associated cutter or cutters mounted on the slide member for rotation therewith during operative rotation of the lead screw member, the slide member being slidably moved along the lead screw member by the advancing tubing during intersection of the tubing by the associated cutter or cutters with the slide member and associated cutter or cutters being returned to the initial position thereof between intersections of the tubing by the cutter or cutters. There is also disclosed a method of producing the lead screw members with the outwardly projecting cutters mounted thereon.
Apparatus for perforating tubing, the apparatus comprising drive means for advancing tubing along an axial path thereof, at least one cutter rotatably mounted in a rotary path which intersects the tubing and which is in a plane substantially at right angles to said axial path of the tubing, for intermittent intersection of the tubing by the cutter, means mounting said cutter by means intermittently engageable with the tubing for moving the cutter by the tubing in a direction parallel to said axial path from a rearward position to a forward position during operative intersection of the tubing by the cutter, a return member for returning the cutter from the forward position to the rearward position between operative intersections of the tubing by the cutter, and support means for supporting the tubing and restraining the tubing against rotation thereof about said axial path during operative intersection of the tubing by the cutter.
Apparatus for perforating corrugated tubing, the apparatus comprising drive means for advancing tubing along an axial path thereof, at least one cutter rotatably mounted in a rotary path which intersects the tubing and which is in a plane substantially at right angles to said axial path of the tubing, for intermittent intersection of the tubing by the cutter, means mounting said cutter by means intermittently engageable with the tubing for moving the cutter in a direction parallel to said axial path from a rearward position to a forward position during operative intersection of the tubing by the cutter, a return member for returning the cutter from the forward position to the rearward position between operative intersections of the tubing by the cutter, and support means for supporting the tubing and restraining the tubing against rotation thereof about said axial path during operative intersection of the tubing by the cutter.
A method of perforating tubing, the method comprising the steps of advancing the tubing along an axial path thereof, and simultaneously rotating at least one cutter in a rotary path which is in a plane substantially at right angles to said axial path of the tubing and which intersects the tubing thereby to perforate the tubing by intermittent intersection of the tubing by the cutter, while the cutter is being moved by the tubing in a direction parallel to said axial path from a rearward position to a forward position thereof, and returning the cutter from the forward position to the rearward position between operative intersections of the tubing by the cutter, the tubing being supported and being restrained against rotation thereof about said axial path during intersection of the tubing by the cutter.
Dependencies are inferred from the claim text.