B - Operations – Transporting – 26 – B
Patent
B - Operations, Transporting
26
B
30/65
B26B 5/00 (2006.01) B26B 1/00 (2006.01) B26B 1/04 (2006.01)
Patent
CA 1331278
ABSTRACT OF THE DISCLOSURE A utility knife comprises a lower elongate part shell and an upper such part shell forwardly fitted with interengaging wedging surfaces whereby they clamp together on relative longitudinal movement. This movement is achieved by turning a nut on a shank which extends rearwardly from one part shell through the rear wall of the other part shell, so that the nut bears upon this rear wall. Loosening of the nut unclamps the part shells and thus permits a blade carried on a slider within the part shells to be pushed forward by a protruding pushbutton. Such loosening does not separate the part shells since an end spur of the shank still rides on a transverse arresting web of the upper part shell. Maximum unscrewing of the nut, however, permits separation e.g. for access to stack of spare blades resiliently held in the rearward part of the lower part shell 1 (now unencumbered by the conventional screw-shank), but does not lead to loss of the nut because a complementary detent configuration at the end of the shank and in the end wall of the nut prevents complete nut/shank separation. The end spur can be upwardly sloping at its underside and thus constitute an auxiliary clamping means for the lower part shell against the upper part shell.
566209
Marks & Clerk
Stanley Works Limited (the)
LandOfFree
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