Hammer for breaking concrete

Details Hammer for breaking concrete Hammer for breaking concrete

2007-02-13

2007-02-13

Kreck, John (Department: 3673)

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Floor-working

Reexamination Certificate

active

11247861

ABSTRACT:
The hammer impact cracks the concrete, then separates the concrete from the steel and creates concrete aggregate. The hammer has a pair of arms with an angled portion for sliding on an angled portion of guide plates, which have a long surface in contact with the hammer arms to provide a stable movement of the hammer without sideways motions. The hammer can be a gravity drop hammer or a compressed gas accelerated hammer. The hammer can pivot to adjust the blows to be perpendicular to the surface being impacted. The pivot also helps in retracting the hammer from the concrete to unjam it therefrom particularly when the concrete is moving relative to the hammer. The pivotable hammer is useful for transporting the hammer and for maintenance work on the hammer. The hammer has teeth to increase the shock of impact to crack and then break the concrete along the cracks.

REFERENCES:
patent: 1891221 (1932-12-01), Cornett
patent: 3381764 (1968-05-01), Peterson et al.
patent: 3627064 (1971-12-01), Sjoberg et al.
patent: 5607022 (1997-03-01), Walker et al.
patent: 6702037 (2004-03-01), Thiessen

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