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US 4,319,857 AGranted
Vibrator devices in a roadroller
OwnerLionel A. Reynoldsinventor
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OwnerLionel A. Reynoldsinventor
Estimating the term…
A vibratory road roller has a drum adapted to be vibrated as it rolls along the ground, to this end the drum containing a vibrator device of the type which produces a vibratory effect as a result of rotation of an out-of-balance mass. The vibrator device comprises a casing, fixed to an end plate of the drum, and a rotor which has a fluid-containing cavity with the contained body of fluid contacting a swept internal annular surface of the casing. A piston movable radially in the rotor and/or the body of fluid provides the out-of-balance mass, and the vibratory force is transmitted to the casing and hence to the drum by the fluid pressure acting on the swept annular surface of the casing. The rotor structure itself is mechanically balanced so that substantially no vibratory force is transmitted through the rotor shaft and bearings.
A vibratory road roller comprising a vibratory drum and a hydraulic vibrator device mounted coaxially with said drum, said vibrator device comprising a rotor mounted for rotation relative to said drum about the longitudinal axis of the drum, said rotor having a cavity open at a peripheral region of the rotor and adapted to contain a body of fluid which is eccentric of said axis, the rotor being surrounded by a swept annular surface fixed relative to said drum and so as to be contacted by and to contain said body of fluid in said cavity, and an out-of-balance mass to produce on rotation of the rotor a centrifugal force transmitted to said drum as a vibratory force by the pressure of said body of fluid on said swept annular surface.
A vibratory road roller comprising a vibratory road-contacting drum and a hydraulic vibrator device mounted coaxially with said drum, said vibrator device comprising a rotor mounted for rotation relative to said drum about a longitudinal axis of the drum and coaxially surrounded by a swept annular surface fixed relative to said drum, an out-of-balance mass and drive means for rotating said rotor, said rotor having a cavity open at a peripheral region of the rotor and adapted to contain a body of fluid which is eccentric of said axis, contacts said swept annular surface and is contained thereby in said cavity, said out-of-balance mass producing on rotation of said rotor a centrifugal force transmitted to said drum as a vibratory force by the pressure of said body of fluid on said swept annular surface.
Dependencies are inferred from the claim text.