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US 4,050,701 AGranted
Fluid seal
AssigneeIngersoll-Rand Company
InventorPaul Dale Webb
Life of this patent
Estimating the term…
Abstract
The novel seal comprises a non-contacting, floating ring seal formed, by injection molding, of carbon fiber-reinforced polyphenylene sulfide, for use in fluid-sealing a rotary steel shaft. The reinforced polyphenylene sulfide exhibits thermal expansion which is substantially equal to that of steel; thus a predetermined radial clearance is maintained, between the seal and the shaft without the need for a circumferential steel band, or the like, shrunk onto the seal.
Claims3
A fluid seal, for fluid sealing a steel shaft having a given outside diameter, comprising:
- a sealing element;
- said element being formed of a moldable polymer material having a coefficient of expansion substantially equal to the coefficient of expansion of steel;
- and wherein
- said element has carbon fibers and polytetrafluoroethylene particles dispersed therewithin.
1 more element
Dependencies are inferred from the claim text.