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Class Information
Number: 277/542
Name: Seal for a joint or juncture > Seal between relatively movable parts (i.e., dynamic seal) > Circumferential contact seal for other than piston > Contained or compressed by gland member in packing box > Consisting of loose-fill type packing
Description: Seal for the gland and packing box wherein the seal is a free unshaped packing material.

Patents under this class:

Patent Number Title Of Patent Date Issued
8528912 Method and apparatus for injecting packing into stuffing boxes for reciprocating rods Sep. 10, 2013
5518255 Carbon-based composite ceramic sealing material May. 21, 1996
4540184 Sand-filled sealing structure between at least one tube and a tube support plate Sep. 10, 1985
4062551 Cable seal unit for earth-boring drill strings Dec. 13, 1977

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