F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/86
F16B 39/282 (2006.01)
Patent
CA 1135090
ABSTRACT OF THE DISCLOSURE A fastening device comprising, a body having an en- gaging surface and threads concentric with the axis thereof, a plurality of ratchet-like projections formed on the engaging surface in the form of a sawtooth in cross section, each of the projection having a first side edge and a second side edge with a leading point which forms high end of the projections, the points being faced to the opposite direction in relation to the direction of tightening of the fastening device, each of the first edges being lain on an appropriate first tangent line extended tangentially with respect the axis of the device and each of the second edges being lain on an appropriate second tangent line which is crossed to the first line, the first lines and second lines being formed at regular interval and such interval being so arranged that a plurality of inter- secting points of the first and second lines are formed between the outer edge and an inner edge of the engaging end surface thereby forming a plurality of the leading point between the outer and inner edge of the engaging surface.
333410
Nakae Isoji
Swabey Ogilvy Renault
LandOfFree
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