Through hole rotating cylinder
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United States of America Patent
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-
Mar 5, 1991
Grant Date -
N/A
app pub date -
Nov 30, 1988
filing date -
Nov 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A through hole rotating cylinder for controlling a workpiece gripping chuck associated with a rotary machine tool. The cylinder includes a cylinder body assembly, piston tube and fluid distributor section rotatable within a housing and defining a central axial opening. Bearings supported between the housing and cylinder body assembly are lubricated by flow from a hydraulic system used to move the piston tube in the cylinder body assembly. A coolant collector receives coolant liquid travelling through the central axial opening. A seal assembly between the coolant collector and the bearings prevents coolant from contaminating the hydraulic fluid in the hydraulic system.
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