F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/19
F16B 13/14 (2006.01) F16B 13/04 (2006.01) F16B 13/10 (2006.01)
Patent
CA 1248793
ABSTRACT An improved fastening element for securement within an opening and of the type comprising (a) a head portion; (b) a connecting portion comprising a body dis- posed centrally upon and upstanding from the head portion and a pair of opposed pillar-like parts, for insertion into such opening; and (c) at the end of said connecting portion remote from the head portion, locking parts movable between a collapsed position in which the fastening ele- ment is insertable into the opening and an expanded posi- tion in which the locking parts are effective in coopera- tion with an elongated retaining element inserted into the fastening element to preclude removal of the fastening element from the opening. The improvement of the inven- tion resides in the locking parts which comprise: (i) a pair of substantially rigid arms each pivotally connected to a respective one of said pillar-like parts at radial locations substantially adjacent to or within the radius of the body portion in the expanded position and each having a distal and a proximal end portion, wherein said proximal end portions are cantilevered and adapted for en- gagement with an elongated retaining element and disposed to pivot with respect to each other in a plane which includes the longitudinal axis of said body, whereby the arms are movable toward each other to a collapsed position and away from each other to an expanded position; and (ii) a pair of substantially rigid arms with each having a proximal and a distal end, and with each being pivotally connected to a respective one of arms (i) and pivotally connected to each other on the longitudinal axis of the body portion for engagement with the elongated retaining element, whereby such arms (ii) are movable toward each other to a collapsed position and away from each other to an expanded position. Each arm is substantially longer than the maximum transverse dimension of the body. The arms (i) and (ii) are conjointly movable in symmetric pantographic con- figuration between the collapsed and expanded posi- tions in a plane which includes the longitudinal axis of the body.
359668
Mechanical Plastics Corp
Osler Hoskin & Harcourt Llp
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