F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 23/00 (2006.01)
Patent
CA 2308662
A screw includes a shank and a head. The head includes a driving socket having a long slot. A first short recess is defined in a bottom wall defining the long slot and extended along a longitudinal axis of the long slot. A second short recess extends along a normal axis normal to the longitudinal axis of the long slot. The short recesses together defining a cross-shape recess for receiving a Phillips type screw driver. A square recess for receiving a square socket type driver is located with an area defined by four ends of the short recesses. The square recess includes four apexes and two diagonal axes that intersect at an intersection that is coincident with an intersection of the longitudinal axis and the normal axis. One of the diagonal axes is at an angle not equal to 0°, 45°, or 90° with the normal axis.
Bull Housser & Tupper Llp
Lu Cheng Chuan
LandOfFree
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