E - Fixed Constructions – 02 – F
Patent
E - Fixed Constructions
02
F
37/35
E02F 3/76 (2006.01) E02F 9/08 (2006.01)
Patent
CA 1126505
IMPROVED DUAL TRACTOR ROAD GRADER ABSTRACT OF THE DISCLOSURE A double arch center frame employs a depending center arch to mount by a bail and socket connection the leading end of a draw bar and yoke assembly. Bell cranks pivotably mounted to yoke plates borne by the arched center frame intermediate of the center arch and the rear arch have arms pivotably coupled to respective hydraulic lift cylinders disposed on opposite sides of the center frame and to a link member common to the bell cranks. A side shift hydraulic cylinder is pivotably connected at one end to one side of a subframe rotatably supporting a mold board assembly and at the other end to said link member intermediate of its pivot connections to said second arm of the bell crank members. The hydraulic lift cylinders are coupled at their opposite ends to respective sides of the subframe such that like extension and retraction of the hydraulic lift cylinders causes the subframe and the mold board assembly to be vertically raised or lowered; extension or retraction of only one of the hydraulic lift cylinders with respect to the other causes the mold board assembly to be tilted in the plane of the longitudinal axis of the mold board, and extension or retraction of the side shift hydraulic cylinder causes the subframe and the mold board assembly to be shifted laterally with respect to the longitudinal center line of the center frame. The forward arched end of the center frame is articulated to a front single axle tractor for rotation about right angle, vertical and horizontal axes, and the rear arched end of the center frame is hinge connected to a rear single axle tractor for pivoting about a horizontal axis. Multiple hydraulic crab steering cylinders force angulation of the tandem wheel tractors relative to respective ends of the double arch center frame to move the unit selectively into laterally offset crab steering conditions for the dual tractors for soft ground grading.
344735
G. Ronald Bell & Associates
Pyle Inc.
LandOfFree
Dual tractor road grader does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual tractor road grader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual tractor road grader will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-984560