Device for opening connection to lined pipe
AssigneePicote Solutions Oy Ltd.
InventorMika Lokkinen
Life of this patent
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Abstract
A device for opening a connection to a lined pipe is disclosed. The device has a body that includes a front end and a rear end and being rotatable about a rotation axis. The device also has a drill head that has multiple cutters for puncturing and enlarging a hole in a liner, and multiple side cutters have at least one cutting edge parallel to the rotation axis. A safety ring is disposed on the body between the drill head and the side cutters. The safety ring has a circular periphery extending beyond the drill head and the side cutters in a direction perpendicular to the rotation axis.
Claims2
A device having a drill head for opening a connection to a lined pipe, the drill head being rotatable about a rotation axis, comprising:
- four step-wise tapered cutting edges disposed at a front end of the device for puncturing and enlarging a hole in a liner,
- each of the four step-wise tapered cutting edges having multiple cutting edges parallel to the rotation axis and multiple cutting edges perpendicular to the rotation axis;
- and
- spacers being disposed between the four step-wise tapered cutting edges of the drill head for reducing cutting depth of the cutters.
Dependencies are inferred from the claim text.