Land vehicles – Wheeled – Articulated vehicle
Patent
1978-07-05
1980-04-08
Pekar, John A.
Land vehicles
Wheeled
Articulated vehicle
172324, B60D 114
Patent
active
041969170
ABSTRACT:
A pull-type mobile harvesting machine includes a header supported on a main frame and an arch-like tongue swingably connected to the main frame and extending forward over the header for pivoting connection to a tractor. A double-acting hydraulic steering cylinder controlled from the tractor is connected between the frame and tongue for swinging the tongue relative to the frame while the machine is advancing so that the machine is displaced laterally selectively between a range of operating positions, offset relative to the tractor, and transport positions, generally immediately behind the tractor. A shut-off valve in one of the hydraulic lines to the cylinder makes it possible to trap oil in one side of the cylinder in any given condition of cylinder extension, thus locking the tongue in a given position relative to the frame and also preventing flow of oil to the cylinder so that inadvertent manipulation of a cylinder control valve at the tractor does not cause accidental swinging of the tongue and lateral displacement of the machine relative to the tractor.
REFERENCES:
patent: 1172748 (1916-02-01), Sparling
patent: 3124371 (1964-03-01), Weir
patent: 3369360 (1968-02-01), DeBiasi
patent: 3832837 (1974-09-01), Burkhart
patent: 4072096 (1978-02-01), Phillips
Davis Wilbur M.
Oakes Jay E.
Deere & Company
Pekar John A.
LandOfFree
Hydraulic lock for the swingable tongue of a towed machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic lock for the swingable tongue of a towed machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic lock for the swingable tongue of a towed machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-970302