Spring devices – Fluid – Expansible-contractible chamber device
Patent
1984-10-25
1987-05-12
Reger, Duane A.
Spring devices
Fluid
Expansible-contractible chamber device
92168, 18832217, 277125, 277205, 277DIG6, F16F 902
Patent
active
046643621
ABSTRACT:
A gas spring unit with an improved packing structure for providing a lubricated guide and seal with the piston rod for containing a high-pressure gas while enabling the spring unit to function for a large number of operational cycles. The packing structure includes a pair of lubricating-type bushings disposed for slidable engagement with the piston rod, which bushings are axially spaced and confine a seal ring therebetween, the latter preferably being of polyurethane. The bushings are preferably impregnated with a lubricant such as graphite. The innermost bushing abuts against a shoulder on the housing to avoid imposition of excessive compressive forces on the seal ring.
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Oberley Alvin
Rantom, Inc.
Reger Duane A.
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