Rotary harrows

Details Rotary harrows Rotary harrows

1975-03-27

1977-08-16

Marlo, George J.

Earth working

With drive means for tool or cleaner

With non-driven tool

172 78, 172 80, 172112, 172 59, 172 49, 172767, 111 63, 111 69, A01B 3306

Patent

active

040420418

ABSTRACT:
A rotary harrow has soil-working members that are protected and, to some extent, supported from the ground by an elongated transverse beam that is pivoted to the front of the frame. The beam is spring biased to an operative location adjacent the soil-working member connections and vertically adjustable with respect to those members. The beam is rounded off at its lower surfaces to level the ground and ride along the ground. If debris becomes lodged between the beam and soil-working members, the beam can pivot forwardly against spring opposition to release the debris. The pivot axis for the beam is substantially directly above the beam itself.

REFERENCES:
patent: 1054609 (1913-02-01), Perry
patent: 1186375 (1916-06-01), Burrows
patent: 1611507 (1926-12-01), Biddle
patent: 1871026 (1932-08-01), Belli
patent: 3367425 (1968-02-01), Heeren
patent: 3604513 (1971-09-01), Tassone
patent: 3638539 (1972-02-01), Lewis
patent: 3774689 (1973-11-01), VAN DER Lely et al.
patent: 3930542 (1976-01-01), VAN DER Lely et al.

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