Portable concrete hammer

Details Portable concrete hammer Portable concrete hammer

1987-05-26

1989-08-01

Yost, Frank T.

Tool driving or impacting

Means to control advance and cyclically reciprocate a...

Hammer or tool cyclically disconnected from cable

173 89, B25D 900

Patent

active

048526614

ABSTRACT:
A portable concrete hammer including a wheeled carriage, a mast movable between a vertical operating position and a horizontal transport position, and an automatic ratchet drive that advances the concrete hammer over a concrete surface during the portion of the operating cycle when the weight is being raised.

REFERENCES:
patent: 2659583 (1953-11-01), Dorkins
patent: 3117635 (1964-01-01), Deerkoski
patent: 3189104 (1965-06-01), Jamer et al.
patent: 3509723 (1970-05-01), Dorn
patent: 3819144 (1974-06-01), Hatlevoll et al.
patent: 4155527 (1979-05-01), Sjoberg

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