US PATENT SUBCLASS 285 / 375
.~.~ Internal reciprocating packer

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


285 /   HD   PIPE JOINTS OR COUPLINGS

335  DF  PACKED {20}
374  DF  .~ Socket {2}
375.~.~ Internal reciprocating packer

DEFINITION

Classification: 285/375

(under subclass 374) Subject matter including internal reciprocating means coacting with the sealing means to perfect the seal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

101+, for line fluid actuated reciprocating packers.

267, for a resiliently urged packing means in a ball and socket joint.

279, for a spring biased flange in a socket type swivel coupling.