.~.~ Rigid retainer* acting as, or retentively contacting a core or hub
DEFINITION
Classification: 410/48
Rigid retainer* acting as, or retentively contacting a core or hub:
(under subclass 47) Structure including rigid means retentively engaging the article along its longitudinal axis, or retentively engaging a member axially related to (generally, an axial part of) the article. [figure]