Curved free standing garden sieve

Details Curved free standing garden sieve Curved free standing garden sieve

1995-08-28

1997-04-29

Bollinger, David H.

Classifying, separating, and assorting solids

Sifting

Concave and convex sifters

209374, 209375, 209412, 209417, 209420, B07B 106

Patent

active

056240384

ABSTRACT:
A free standing curved garden sieve of parabolic shape to separate stones and coarse matter from garden soil as the garden soil travels from upper substantially vertical portions to lower substantially horizontal portions.

REFERENCES:
patent: 155245 (1874-09-01), Leach
patent: 311485 (1885-02-01), Gridley et al.
patent: 1424451 (1922-08-01), Crandall
patent: 1510742 (1924-10-01), Gutleben
patent: 1629149 (1927-05-01), Citrin
patent: 2037078 (1936-04-01), Levy
patent: 3307698 (1967-03-01), Haffner
patent: 4350584 (1982-09-01), Donington
patent: 4505812 (1985-03-01), Lees

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