(under subclass 190) Subject matter wherein the component is specially adapted for supporting a internally threaded fastener or an annular element adapted to be placed beneath the bearing surface of a bolt head, nut, or similar article during a forming operation.
SEE OR SEARCH CLASS
82, Turning,
168+, for work driving and supporting mandrels placed between the centers of a lathe and driving hollow work pieces by engaging their interior surfaces.
269, Work Holders, appropriate subclasses. Class 269 is the residual locus for patents to a device for clamping, supporting and/or holding an article (or articles) in position to be operated on or treated. See notes there-under for other related loci.
