Earth working – Driven from or guided by stationary object – or anchored – Rotatable about vertical axis
Patent
1983-02-24
1984-06-26
Stouffer, Richard T.
Earth working
Driven from or guided by stationary object, or anchored
Rotatable about vertical axis
172372, 172381, 30310, 175382, 175385, 175398, 294 506, A01B 116
Patent
active
044560753
ABSTRACT:
An elongated upstanding shank is provided including a ground piercing lower end and an upper end including structure for applying rotary torque to the shank. The lower end portion of the shank supports a generally horizontally disposed U-shaped blade therefrom including a pair of generally parallel upper and lower arms joined at one pair of corresponding ends by an integral curved bight portion. The other pair of corresponding ends of the arms are supported from the shank at points spaced therealong. At least the lower arm and the adjacent portion of the bight portion include a sharpened edge facing outwardly of one side of an upstanding plane containing the U-shaped blade and the shank. The blade comprises a thick elongated strap metal member bent into U-shaped configuration and the portions of the blade defining the lower arm and the adjacent portion of the bight portion are disposed with their width extents disposed generally normal to the aforementioned plane. The portion of the strap metal member defining the juncture between the upper arm and the adjacent upper portion of the bight portion has a substantially 90.degree. twist formed therein with the base end portion of the upper arm remote from the bight portion being reversely bent upon itself to define a sleeve through which the shank is received and removably secured.
REFERENCES:
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patent: 799359 (1905-09-01), Shaffer
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patent: 3548497 (1970-12-01), Bickett
patent: 3548953 (1970-12-01), Richardson, Sr.
patent: 4003436 (1977-01-01), Foster et al.
patent: 4122902 (1978-10-01), Alexander
Jacobson Harvey B.
Stouffer Richard T.
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