Dual tractor road grader with double arched center frame

Earth working – Scraper between front and rear ground supports of vehicle – Actuator for bodily shifting scraper subframe draft connection

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

172292, 180235, E02F 376

Patent

active

043644384

ABSTRACT:
A double arch center frame employs a depending center arch to mount by a ball 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 like 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 a link member intermediate of its pivot connections to a second arm of the bell crank members. 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. In a further embodiment, a cab is provided on the rear tractor. Also, the rear steering cylinder mounts are moved closer to the center of the cross bar and the king pin hinge joint brackets are advanced forward of the rear end of the center frame.

REFERENCES:
patent: D259045 (1981-04-01), Mende
patent: 3672460 (1972-06-01), Takata
patent: 3933216 (1976-01-01), Irwin
patent: 4279312 (1981-07-01), Pyle

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Dual tractor road grader with double arched center frame 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 with double arched center frame, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual tractor road grader with double arched center frame will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-402334

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.