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US 4,045,892 AGranted
Hydraulically operated front and rear wing hangers for snow plows
AssigneeFrink Sno-Plows
InventorEugene A. Farrell
Life of this patent
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AssigneeFrink Sno-Plows
InventorEugene A. Farrell
Estimating the term…
A truck has a pusher frame secured to its front end and has a space between its cab and its body at the rear. A front post is secured to the pusher frame and a rear post is secured to the vehicle frame between the cab and body. Each post includes a vertically disposed rectangular tubular way having a slot along one side and a double acting hydraulic cylinder having its piston rod secured to the bottom end of the way and the lower end of its cylinder secured to the rectangular portion of a pair of spaced plates adapted to slide within the posts. The cylinder has a piston secured to the upper end of a double tubed piston rod, one tube being telescoped within the other and having an annular space therebetween, the central tube extending beyond the other at each end. Both connecting rod tubes have means for admitting fluid under pressure at their lower ends, the space between the tubes being sealed at this end, the inner tube extending through the piston at its top for expanding the device and the outer tube having openings below the piston for connecting the space between the tubes to the cylinder for lowering the cylinder. The pair of spaced plates of the slide have a narrow tongue portion projecting through the post slots and connected to a vertically extending slide portion slidable on the exterior of the post. A patrol wing plow blade has its front end pivotally connected to the front post slide and its trailing end pivotally and adjustably connected by a plurality of arms to the rear post slide.
Hanger means for a patrol wing plow blade on a snow plow vehicle comprising substantially vertically extending front and rear tubular ways, each way tube being secured to the vehicle and having a single longitudinally extending slot therein, slide means for each way partially within and partially without the way and having portions extending through the way slot, a double action hydraulic cylinder in each way, the cylinder being secured to the portion of the slide within the way, a piston within the cylinder having a piston rod extending downward in the way and having its lower end secured to the lower end of the way, the rod having a first passage therein extending from the bottom end up through the piston and in communication with the interior of the cylinder above the piston and a second passage extending from a point adjacent the bottom of the way to a point adjacent the piston and in communication with the interior of the cylinder below the piston, each passage having means at the bottom of the way for connecting the passage with a source of fluid under pressure, the respective portion of each slide outside the way being operatively connected to opposite ends of the plow blade, whereby the plow ends are raised and lowered by the selective admission of fluid under pressure to the passages.
Hanger means for a patrol wing plow blade on a snow plow vehicle comprising substantially vertically extending front and rear tubular ways, the ways being polygonal in cross section and secured to the vehicle, each way having one longitudinally slotted side, each way having slide means partially within and partially without the tubular way, portions of each slide extending through the side slot, a double action hydraulic cylinder in each way, the cylinder being secured to the portion of the slide within the way, a piston within the cylinder having a piston rod extending downward in the way and having its lower end secured to the lower end of the way, the rod having a first passage therein extending from the bottom end up through the piston and in communication with the interior of the cylinder above the piston and a second passage extending from a point adjacent the bottom of the way to a point adjacent the piston and in communication with the interior of the cylinder below the piston, each passage having means at the bottom of the way for connecting the passage with a source of fluid under pressure, the portion of each slide outside the way being operatively connected to opposite ends of the plow blade, whereby the plow ends are raised and lowered by the selective admission of fluid under pressure to the passages.
Lift means for a small plow blade carried by a vehicle requiring powered movement from a position in contact with the ground to a position above the chassis of the vehicle comprising an elongated hollow tubular way secured in a substantially vertical position to the chassis, the way being rectangular in cross section and having a longitudinally extending central slot through one side;
Dependencies are inferred from the claim text.