Earth working – Lawn aerator or perforator – or plug remover – Earth removing
Patent
1980-03-25
1981-08-11
Shapiro, Paul E.
Earth working
Lawn aerator or perforator, or plug remover
Earth removing
172713, 172771, 30365, A01B 4502
Patent
active
RE0307050
ABSTRACT:
Disclosed herein is a soil aerating device including a frame, a hollow cylindrical drum supported from the frame for rotation about a horizontally extending axis and for folling travel along the surface of the ground or turf to be aerated. Fixedly mounted on the exterior of the drum in registry with respective apertures provided in the drum are a plurality of hollow core-forming tines which are arranged to act much like involute gear teeth, while cutting and removing a plug or core from the ground or turf as the drum is rolled over the surface thereof, and to leave a "rack-like" pattern of holes. Each tine includes a pair of generally V-shaped, opposed side walls having an apex located on or near a radial plane extending radially from the drum axis. At least a part of the leading end portions of the side walls terminates in a sharpened cutting edge segment and the trailing end portions of the side walls are connected by a transverse trailing end wall which cooperates with the side wall cutting edge segments to form a generally U-shaped cutting edge.
REFERENCES:
patent: 2063333 (1936-12-01), Nolte
patent: 2580236 (1951-12-01), Mascaro
patent: 3022833 (1962-02-01), Reaser
patent: 3171498 (1965-03-01), Logan
patent: 3221822 (1965-12-01), Dedoes
patent: 3264877 (1966-08-01), Boxrud
patent: 3650332 (1972-03-01), Dedoes
patent: 3739857 (1973-06-01), Little
patent: 3794121 (1974-02-01), Drozak
patent: 3881553 (1975-05-01), Angeski
Outboard Marine Corporation
Shapiro Paul E.
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