Expansible chamber devices – With guide or seal on cylinder end portion for piston or... – Non-metallic seal means between piston or member and end...
Patent
1993-11-30
1996-05-07
DuPumpo, Daniel G.
Expansible chamber devices
With guide or seal on cylinder end portion for piston or...
Non-metallic seal means between piston or member and end...
277115, 277166, 277181, 277189R, F16J 1532
Patent
active
055135560
ABSTRACT:
An improved packing gland construction for a fluid cylinder that includes an angular elongated resilient sealing member disposed in contact with the piston rod of the cylinder. An end of the sealing member facing the interior of the cylinder is provided with a flexible lip and the internal pressure within the cylinder acts to urge the lip inwardly into sealing engagement with the piston rod. The outer end of the sealing member is provided with a tapered wiper which rides on the piston rod and acts to remove foreign material from the rod. The outer surface of the sealing member is formed with a circumferential groove which receives a ring, and the inner end of the ring bears against an abutment on the cylinder while the outer end of the ring is engaged by a cap that is secured to the end of the cylinder. The cap has an annular inclined surface which engages and urges the wiper inwardly against the piston rod.
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patent: 4717161 (1988-01-01), Stremechus
patent: 4813343 (1989-03-01), Schaefer
patent: 5165700 (1992-11-01), Stoll et al.
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