04131162 is referenced by 13 patents and cites 8 patents.

An earth working apparatus comprising a main frame having a hitch for detachably connecting the apparatus to a prime mover, a first ground working implement mounted on the main frame, a pair of support arms operatively connected at forwardly disposed ends thereof to the main frame for pivotal movement about a first transverse axis, ground engaging wheels mounted on the support arm, a lift arm operatively connected to each of the support arms for pivotal movement about a second transverse axis, a second earthworking implement mounted on the lift arms, chains interconnecting each of the lift arms and the main frame, a ground engaging wheel mounted on one of the frames and hydraulic cylinders operatively interconnecting each of the support arms and the main frame for angularly displacing the support arms relative to the main frame whereby upon actuation of the hydraulic cylinders when the ground engaging wheel is not in engagement with the ground, the working implements will be caused to move into and out of engagement with the ground, and upon actuation of the hydraulic cylinders when the wheel is in engagement with the ground, which will be caused to move substantially vertically to permit the apparatus to be attached and detached from the prime mover. This invention relates to an earth working apparatus and more particularly to an earth working apparatus which may be converted into a condition both permitting and facilitating the transportation of the apparatus both on and off public highways from one working site to another.

Title
Earth working apparatus
Application Number
5/639884
Publication Number
4131162
Application Date
December 11, 1975
Publication Date
December 26, 1978
Inventor
James E Schmitz
5521 Le Juene Rd., Orlando, 32808
FL, US
Agent
Mason Fenwick & Lawrence
IPC
A01B 15/16
A01B 63/16
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