Stone working – Dressing – Pick-action cutter
Patent
1976-08-05
1979-04-17
Whitehead, Harold D.
Stone working
Dressing
Pick-action cutter
B28D 122
Patent
active
041495136
ABSTRACT:
A pneumatically-powered hammer for giving concrete surfaces a rough texture and an efficient method for using the hammer. The hammer comprises a pneumatic riveting hammer with a uniquely short and blunt-ended accessory secured thereto. The pneumatic riveting hammer uses, for example, a 11/2 inch piston and is activated by increased air pressure thus assuring a rapid, forceful stroke. Operation of the hammer includes holding the blunt end of the accessory securely against the concrete surface to be textured while moving the hammer horizontally across the surface in short vertical strokes during the entire time the hammer is activated. Excessive gouging and corner chipping caused by the hammer are repaired by partially filling such gouges or chips with wet, fast-setting concrete and securing leavings broken away by the hammering process to the wet concrete such that the repaired gouges and chips match the remainder of the surface in color and texture.
REFERENCES:
patent: 328197 (1885-10-01), Cullingworth
patent: 376296 (1888-01-01), Cummings
patent: 702037 (1902-06-01), Stigliz
patent: 1537358 (1925-05-01), Lartique
patent: 3968843 (1976-07-01), Shotwell
Ostfeld David M.
Whitehead Harold D.
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