.~ Central support has shoulders expanding sealing portion, or telescopes
DEFINITION
Classification: 166/196
(under subclass 179) Devices comprising either (1) a central support for the deformable sealing portion comprising telescoping sections whereby relative longitudinal movement of this section causes expansion of the sealing portion or (2) a central support for the deformable sealing portion having projecting portions relatively movable towards each other to cause expansion of the sealing portion.
(1) Note. The central support is usually a pipe which extends beyond the ends of the deformable sealing portion in a longitudinal direction.
SEE OR SEARCH THIS CLASS, SUBCLASS:
118+, especially subclasses 134 through 140, for devices in which projecting portions on a central support, which causes expansion of a deformable sealing portion, comprise expanding anchor means.
195, for packers of the telescoping support type in which the deformable portion of the packer engages a shoulder on the surrounding conduit.
