Soil aeration and cultivation tine

Details Soil aeration and cultivation tine Soil aeration and cultivation tine

2004-08-27

2009-02-03

Will, Thomas B (Department: 3671)

Earth working

Lawn aerator or perforator, or plug remover

C172S122000, C172S540000

Reexamination Certificate

active

07484568

ABSTRACT:
A tine for mounting on a rotatable shaft of soil aeration and cultivation equipment, comprising: mounting means at an attachment end of the tine; a tip at a ground-engaging end of the tine opposite the attachment end; leading and trailing convex curvilinear edges disposed opposite each other and converging toward the attachment end and the tip; and bevelled sections on each of the leading and trailing convex curvilinear edges. The unique shape of the tine has been found to create a wider range of soil disturbance than is the case with conventional straight-edge tines, requires less material to manufacture, and penetrates the ground surface more easily than conventional straight-edge tines due to the convex leading edge.

REFERENCES:
patent: 260342 (1882-06-01), Williamson
patent: 545545 (1895-09-01), Spitzenberg
patent: 1858749 (1932-05-01), Paterson et al.
patent: D263233 (1982-03-01), Van der Lely
patent: 4383580 (1983-05-01), Huxford
patent: 4467874 (1984-08-01), Wittrock
patent: 4840232 (1989-06-01), Mayer
patent: D483464 (2003-12-01), Tai
patent: D485609 (2004-01-01), Tai
patent: 6691791 (2004-02-01), Bjorge
patent: 6854525 (2005-02-01), Martindale
patent: 6923266 (2005-08-01), McLeod

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