Panel closure apparatus
A panel closure apparatus has a panel ( 14 ) for closing against a strike jamb ( 12 ). A locking element ( 100 ) is displaceable between a released position and a locked position in which contact surfaces ( 102, 104 ) of the locking element and the panel prevent opening of the panel, and are configured so that force applied to open the panel does not generate a force to disengage the locking element. Locking element ( 100 ) has an input surface ( 108 ) deployed so as to be displaced by an actuating surface ( 110 ) of panel ( 14 ) during a closing motion of the panel from the open position to the closed position. Input surface ( 108 ) moves as a unit with locking element ( 100 ) so that displacement of the input surface by the closing motion of the panel displaces the locking element towards the locked position.
1. An apparatus comprising:
(a) an opening bounded in part by a strike jamb;
(b) a panel mounted relative to said opening so as to be displaceable between an open position in which said panel is separated from said strike jamb to leave at least part of said opening open and a closed position in which said panel closes against said strike jamb; and
(c) a lock mechanism associated with said strike jamb, said lock mechanism comprising a locking element displaceable relative to said strike jamb along a path of motion from a released position in which said panel can be separated from said strike jamb to a locked position in which said locking element obstructs displacement of said panel from said strike jamb, contact surfaces of said locking element and said panel being such that a force applied to said panel directed to open said panel does not generate a force acting to displace said locking element back along said path of motion,
wherein said locking element provides an input surface deployed so as to be displaced by an actuating surface of said panel during a closing motion of said panel from said open position to said closed position, said input surface moving as a unit with said locking element such that there is no relative motion between said input surface and said locking element, such that displacement of said input surface by the closing motion of said panel displaces said locking element towards said locked position.
2. The apparatus of claim 1 , wherein said input surface and said actuating surface are deployed such that displacement of said locking element towards said locked position begins prior to said panel reaching said closed position.
3. The apparatus of claim 1 , wherein, when displaced towards said locked position, said locking element passes a critical point such that an opening force applied to said panel results in geometrical or frictional locking of said locking element with said panel and said strike jamb sufficient to oppose displacement of said locking element towards said released position.
4. The apparatus of claim 1 , wherein said lock mechanism is configured such that completion of said closing motion of said panel can only occur when said locking element assumes said locked position.
5. The apparatus of claim 1 , wherein said locking element is pivotally mounted about an axis of rotation.
6. The apparatus of claim 5 , wherein a distance from said axis of rotation to said contact surface of said locking element is greater than a distance from said axis of rotation to said input surface.
7. The apparatus of claim 5 , wherein a part of said panel overlaps a part of said strike jamb in said closed position, and wherein said input surface is located in a region of said overlap.
8. The apparatus of claim 1 , wherein said panel is hingedly mounted relative to said opening.
9. The apparatus of claim 1 , wherein said panel is slidingly mounted relative to said opening.
10. An apparatus comprising:
(a) an opening bounded in part by a strike jamb;
(b) a panel mounted relative to said opening so as to be displaceable between an open position in which said panel is separated from said strike jamb to leave at least part of said opening open and a closed position in which said panel closes against said strike jamb; and
(c) a lock mechanism associated with said panel, said lock mechanism comprising a locking element displaceable relative to said panel along a path of motion from a released position in which said panel can be separated from said strike jamb to a locked position in which said locking element obstructs displacement of said panel from said strike jamb, contact surfaces of said locking element and said strike jamb being such that a force applied to said panel directed to open said panel does not generate a force acting to displace said locking element back along said path of motion,
wherein said locking element provides an input surface deployed so as to be displaced by an actuating surface of said strike jamb during a closing motion of said panel from said open position to said closed position, said input surface moving as a unit with said locking element such that there is no relative motion between said input surface and said locking element, such that displacement of said input surface by the closing motion of said panel displaces said locking element towards said locked position.
11. The apparatus of claim 10 , wherein said input surface and said actuating surface are deployed such that displacement of said locking element towards said locked position begins prior to said panel reaching said closed position.
12. The apparatus of claim 10 , wherein, when displaced towards said locked position, said locking element passes a critical point such that an opening force applied to said panel results in geometrical or frictional locking of said locking element with said panel and said strike jamb sufficient to oppose displacement of said locking element towards said released position.
13. The apparatus of claim 10 , wherein said lock mechanism is configured such that completion of said closing motion of said panel can only occur when said locking element assumes said locked position.
14. The apparatus of claim 10 , wherein said locking element is pivotally mounted about an axis of rotation.
15. The apparatus of claim 14 , wherein a distance from said axis of rotation to said contact surface of said locking element is greater than a distance from said axis of rotation to said input surface.
16. The apparatus of claim 14 , wherein a part of said panel overlaps a part of said strike jamb in said closed position, and wherein said input surface is located in a region of said overlap.
17. The apparatus of claim 10 , wherein said panel is hingedly mounted relative to said opening.
18. The apparatus of claim 10 , wherein said panel is slidingly mounted relative to said opening.