This subclass is indented under the class definition. Device comprising an annular sleeve to line an opening which
extends through the interior of a structure to (a) prevent the abrasion
of any elements passing through the opening or the structure itself
or (b) fortify the opening.
(1)
Note. The device of this subclass may have any of a variety
of means for fastening it to the wall of the opening such as a weld
or a compression ring. The opening may be the end of a pipe or other
conduit.
(2)
Note. In a claim proper for this subclass as much of the device
having the opening (e.g., pipe) may be included as is necessary
to define the bushing.
(3)
Note. A grommet is considered appropriate for this subclass
since it includes structure that extends through an opening having
a substantially planar exterior surface.
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