Thatch loosening rake

Details Thatch loosening rake Thatch loosening rake

1981-02-20

1982-05-18

Hirsch, Paul J.

Earth working

Plural relatively movable tools

Plural tool groups relatively vertically movable because of...

56400, 172643, A01B 3100

Patent

active

043300421

ABSTRACT:
A thatch rake consisting of a frame carrying a multiplicity of downwardly projecting spring teeth dragging the ground and supporting the frame, said teeth being biased forwardly and downwardly but sprung rearwardly by forward motion of the frame, each tooth having a stop member intermediate its ends engageable with the frame after partial springing thereof to reduce its effective length so that portion between the stop and its free end, so as to increase its effective stiffness, and being so supported as to provide a pronounced downward movement thereof if allowed by ground contour to recover forwardly, so as to be enabled to follow uneven ground contours accurately, all of the teeth being connected loosely to allow only limited relative forward and rearward movement thereof, so as to prevent possible bouncing or "leapfrogging" movements of the rake.

REFERENCES:
patent: 689595 (1901-12-01), Lindgren
patent: 711956 (1902-10-01), Furthmiller
patent: 835879 (1906-11-01), Bowman
patent: 2333586 (1943-11-01), Rude
patent: 3765159 (1973-10-01), Neff
patent: 4151701 (1979-05-01), Marto
patent: 4256185 (1981-03-01), Duckworth

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