The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 1978
Filed:
Oct. 15, 1976
Richard W Steinberg, Mankato, MN (US);
Vibra-King, Inc., Mankato, MN (US);
Abstract
A crawler tractor is connected to a cable, pipe and line laying machine with a hitch assembly. The hitch assembly has a transverse drawbar secured to forwardly directed side members. The side members being pivotally mounted to the side frames of the tractor are raised and lowered with a pair of double acting hydraulic cylinders. The machine has a frame attached to the drawbar. An annular resilient and flexible member pivotally mounts a body on the frame. An attitude control cylinder connected to the frame and body adjusts the angular position of the body and a plow standard connected to the body. Plow standard is connected to the body with link and connecting members. On forward movement of the tractor, the plow standard is moved through the soil to form a slit trench for the cable, pipe or line. The connecting members are mounted on a crank shaft rotated by a hydraulic motor to provide the standard with an orbital movement. A wheel assembly having legs pivotally mounted to the body is controlled with a pair of double acting hydraulic cylinders to regulate the ground working depth of the standard.