Stone working – Splitting – shearing – and punching
Patent
1976-04-30
1977-08-30
Whitehead, Harold D.
Stone working
Splitting, shearing, and punching
138 97, B28D 132
Patent
active
040447499
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.
REFERENCES:
patent: 2165118 (1939-07-01), White
patent: 2657681 (1953-11-01), Gatzke
patent: 3727599 (1973-04-01), Sugiki et al.
patent: 3933519 (1976-01-01), Koch et al.
Ames Thomas J.
Barrington Claud C.
Bowen Burlie R.
Lochte Glen E.
HydroTech International, Inc.
Whitehead Harold D.
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