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US 4,305,252 AGranted
Centering and cooling equipment for a hydraulic vibration generator
AssigneeKoehring GmbH - Bomag Division
InventorsUdo Carle, Gulertan Vural
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AssigneeKoehring GmbH - Bomag Division
InventorsUdo Carle, Gulertan Vural
Estimating the term…
Centering and cooling equipment for a hydraulic vibration generator, with a pulsation generator pressurizing a cylinder containing a movable piston, composed of a feed system and a flushing system. The feed system includes spring-loaded non-return valves connecting a fluid reservoir to feed pipes connecting the pulsation generator to the cylinder chambers, and operates to supply cool pressure fluid from the reservoir when pressure in the cylinder chambers falls below a predetermined level. The flushing system includes a control bush/control plunger unit, bush and plunger of which are respectively connected to the piston and cylinder or vice versa, the plunger cooperating with channels in the bush to connect either feed pipe to a return passage according to the off-center position of the plunger in the bush. This system operates to withdraw a quantity of pressure fluid, dependent on pressure and stroke, from the cylinder chambers with each piston stroke.
Centering and cooling equipment for a hydraulic vibration generator driven by a pulsation generator the vibration generator including a cylinder containing a movable piston which divides the interior of the cylinder into cylinder chambers at opposite sides of the piston, in which heated pressure fluid is withdrawn from each cylinder chamber and cool pressure fluid fed to it, comprising a feed system operatively connected to said chambers to supply pressure fluid to each said chamber when the pressure therein falls below a predetermined level, and a flushing system operatively connected to said chambers to withdraw a quantity of pressure fluid, dependent on pressure and stroke, from said chambers with each stroke of the piston, wherein said flushing system comprises a control unit composed of a control bush and a control plunger cooperating with said bush.
Dependencies are inferred from the claim text.