F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 21/18 (2006.01) F16B 39/00 (2006.01) F16B 41/00 (2006.01)
Patent
CA 2328222
A captive screw (10) attachable to an upper panel (60), for attaching the upper panel (60) to a lower surface (62), the lower surface (62) having a threaded hole, the capture screw (10) having a screw (20), a ferrule (50) that attaches to the upper panel (60), a thin-walled, cylindrical hollow knob (30) and protrusions (26) integral to the outer perimeter (25) of the head portion of the screw (20) to rigidly secure the perimeter of the head of the screw to the inner surface of the knob (30), the protrusions (26) providing a press-fit of the screw to the inner surface of the knob where the screw is pressed into the knob from the underside of the knob.
L'invention concerne une vis imperdable susceptible d'être fixée à un panneau supérieur, pour assembler ledit panneau et une surface inférieure. La surface en question comporte un trou taraudé. La vis imperdable est constituée d'une vis, d'une virole qui se fixe au panneau supérieur, d'un bouton cylindrique creux à fines parois et de protubérances intégrées au pourtour de la tête de la vis, de manière à assurer la rigidité de fixation entre ce pourtour et la surface intérieure du bouton. En l'occurrence, les protubérances assurent une insertion à la force de la vis dans la surface interne du bouton lorsque ladite vis est poussée en force vers l'intérieur du bouton depuis le dessous de celui-ci.
Dickerson Harry L.
Ellis Thomas J.
Mccormack Edward A.
Bereskin & Parr
Dickerson Harry L.
Ellis Thomas J.
Mccormack Edward A.
Southco Inc.
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