Seal for gas springs and the like
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United States of America Patent
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Jul 13, 1999
Issued Date -
N/A
app pub date -
Oct 4, 1996
filing date -
Oct 4, 1996
priority date (Note) -
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Abstract
A seal that is particularly suitable for use in a gas spring and other high pressure hydraulic and pneumatic sealing applications and that minimizes the leakage of relatively high pressure gas and lubricating oil from the rod end of the gas spring or other application. The generally annular seal body includes a number of convex sealing lobes on its radially inwardly and outwardly facing surfaces. All of the sealing lobes have a predetermined radius and project radially beyond the plane of their respective surfaces. The axial facing surfaces of the seal body are generally flat or non-concave. The seal also includes a wiper insert secured in a recess in one corner of the radially inwardly facing surface of the seal body. When the seal body is compressed between the relatively movable, annularly spaced piston rod and cylinder of a gas spring or application, the compression induced stress in the seal causes the seal body and insert to form an effective gas and oil seal.
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