Lip type end face sealing device

Details Lip type end face sealing device Lip type end face sealing device

2005-06-16

2010-10-05

Patel, Vishal (Department: 3676)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

Reexamination Certificate

active

07806412

ABSTRACT:
An objective of the present invention is to provide a lip type end face sealing device6having excellent sealability to different kinds of liquids on the both sides in the axial direction and having excellent durability. A case61tight fitted to an inner peripheral face2aof a housing2comprises case members611and612. One pair of seal lips62and63is integrally fitted to inner peripheral flange parts611band612b, positioned oppositely each other in the axial direction, and opened in a tapered shape. One pair of the seal lips62and63is slidably contacted with flange parts64band65bof slingers64and65tight fitted to an outer periphery of a rotary shaft3. Pressure in seal internal spaces S2between the both seal lips62and63and the both slingers64and65is released through a vent hole22opened on the inner peripheral face2aof the housing2, an air hole611copened on the case61, and between the case members611and612.

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International Search Report (in English) for PCT/JP2005/011015, ISA/JP, mailed Sep. 27, 2005.
Written Opinion of the International Search Authority (in Japanese) for PCT/JP2005/011015, ISA/JP, mailed Sep. 27, 2005.

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