Earth working – Towed scraper with ground support wheels
Patent
1985-12-16
1987-10-20
Johnson, Richard J.
Earth working
Towed scraper with ground support wheels
172780, 172795, 172784, 172796, 404118, E02F 376
Patent
active
047007869
ABSTRACT:
A drag-type road grader including a skewable frame and a plurality of blade assemblies extending transversely across the frame. A tongue assembly is mounted on the frame and includes hydraulic cylinders for skewing the frame to alternative parallelogram-shaped configurations whereby the blade assemblies are angled with respect to the direction of travel. Retractible wheel assemblies are provided for transporting the grader in a non-working mode.
REFERENCES:
patent: 981437 (1911-01-01), Linder
patent: 1185090 (1916-05-01), Hall
patent: 1303415 (1919-05-01), Thurston
patent: 1476263 (1923-12-01), Martin
patent: 1773431 (1930-08-01), Mosel
patent: 1812296 (1931-06-01), Jarmin
patent: 1845324 (1932-02-01), Noffsinger et al.
patent: 1994437 (1935-03-01), Reis
patent: 2348445 (1944-05-01), Bayer
patent: 2593880 (1952-04-01), Heavlin
patent: 2646850 (1953-07-01), Brown
patent: 3276153 (1966-10-01), Sorensen
patent: 3435546 (1969-04-01), Iverson
patent: 3883259 (1975-05-01), Berg et al.
Johnson Richard J.
Logan Western Road, Inc.
LandOfFree
Drag-type 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 Drag-type road grader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drag-type road grader will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1607323