Appeal No. 2002-1038
Application 09/122,022
Figure 6. This mold has the opening 10 through which
fusible metal is admitted to form the bolster 3, its
tail piece 4 and the ribs 11, which ribs, filling the
lateral branches or grooves 8, will, when the metal has
cooled, form a perfect anchorage to prevent accidental
withdrawal of said tail piece 4 from the handle [page
1, lines 53 through 72].
Beere discloses a surgical screwdriver handle 10 comprising
a solid metallic core piece 19 and an elastomeric silicone rubber
gripping cover 26. As explained by Beere,
[t]he cover 26 is applied to the core piece 19 in
a molding process and of course molten form to where it
hardens to a rubbery condition which adheres to the
core 19. In the molding process, the elastomer is
caused to flow into grooves 27 extending around and
throughout the length of the core piece 19, as shown in
FIG. 3. . . . As seen in FIG. 3, the groove 27 is
actually one continuous spiral groove from the butt end
22 to the head or cylindrical end 21, and the width of
the grooves 27 is approximately one third of the lands
designated 28 and extending circularly between every
two grooves 27. Thus, in the total length of the core
piece 19, and that may be a length of approximately 4
inches, there are twenty grooves 27 seen on each of the
side elevational view[s] of the core piece 19. FIGS. 9
and 10 show enlarged views of a fragment of the piece
19 and those views particularly show the grooves 27
which are shown to be undercut so that the groove base
29 is wider than the opening of the groove at the
curved surfaces 23 and 24, as particularly seen in FIG.
10. Thus, the molten cover material 26 will flow into
the groove 27 and fill the groove so that the undercut
or wedge-shape groove 27 will trap the portion 31 of
the cover material in the groove 27. With that
arrangement, the cover is secured to the core piece 19
without the need of cement or the like. Thus, the
cover 26 is completely secure and stable on the core 19
and the user can hand grip the cover 26 and apply
rotation torque without having the cover 26 slip
relative to the core piece 19 since the two become
integral by means of the grooving 27 and particularly
5
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 Next
Last modified: November 3, 2007