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US 4,044,749 AGranted
Concrete removal tool
AssigneeHydroTech International, Inc.
InventorsBurlie R. Bowen, Claud C. Barrington, Thomas J. Ames, Glen E. Lochte
Life of this patent
Estimating the term…
Abstract
Method and apparatus for breaking concrete from a concrete coated pipe comprising; a frame mounted on the pipe; means supported by the frame for engaging the concrete to break the concrete from the pipe and means for driving the engaging means against the pipe to impart massive forces thereto exceeding the strength of the concrete to thereby break the concrete from the pipe.
Claims19
Apparatus for breaking concrete from a concrete coated pipe comprising:
- a frame mountable on said pipe;
- bit means rotatably supported by said frame for disengageably engaging said concrete to break said concrete from said pipe,
- means for moving said bit means relative to said pipe;
- and means for simultaneously driving said bit means against said concrete to impart massive force thereto exceeding the strength of said concrete to thereby break said concrete from said pipe as aforesaid.
1 more element
Method for breaking concrete from a concrete-coated pipe comprising the steps of:
- providing a frame having rotatable bit means for engaging said concrete to break the latter from said pipe;
- mounting said frame on said pipe with said bit means being in engagement with said concrete,
- moving said bit means circumferentially and axially relative to said pipe;
- and simultaneously driving said bit means radially against said concrete to impart massive forces thereto exceeding the strength of said concrete to thereby break said concrete from said pipe as aforesaid.
1 more element
Dependencies are inferred from the claim text.