Cylinder apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Sep 5, 2002
app pub date -
Dec 21, 2001
filing date -
Dec 27, 2000
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A piston connected with a piston rod is slidably fitted in a cylinder having a hydraulic fluid sealed therein. The piston rod extends to the outside of the cylinder through a rod guide fitted to an end portion of the cylinder. An annular seal member is inserted into an annular groove formed on the inner peripheral surface of the rod guide. The piston rod extends through the seal member. A wave washer is inserted into a gap between one end of the annular groove and the seal member. With its spring force, the wave washer urges the seal member to be pressed against the sealing surface of the annular groove. Because the seal member is constantly held in the state of being pressed against the sealing surface irrespective of the stroke direction of the piston rod, stable sealing performance can be obtained, and the leakage of hydraulic fluid can be surely prevented.
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