Latch mechanism

E - Fixed Constructions – 05 – C

Patent

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Details

E05C 7/00 (2006.01) B64D 11/00 (2006.01) E05B 51/02 (2006.01)

Patent

CA 2374826

A compact, lightweight latch (38) especially adapted for use which an emergency deployment oxygen mask container (20) is provided which made up of a minimum of parts and which can be delatched in multiple ways. The latch (38) includes a latch assembly (40) designed to be mounted in the oxygen mask container box (22) and a cooperating latch pin (44) secured to a cover (24). The assembly (40) has a primary latch body (46) supporting a diaphragm (48), latch member (50) and shiftable piston (52); the latch member (50) includes a plurality of laterally displaceable, hook-shaped locking legs (86) configured to interfit with latch pin (44). The piston (52) is shiftable in opposite axial directions within latch member (52), and cooperating surfaces on the member (50) and piston (52) serve to positively displace the latching legs (86) in response to piston movement. During pneumatic operation, the piston (52) is shifted within latch member (50) under the influence of diaphragm (48). The latching member (50), piston (52) and latch pin (44) are preferably in substantial axial align-ment, and a passageway (116) in the latch pin (44) allows use of push or pull rods (126, 128) for manual delatching.

L'invention concerne un verrou (38) compact léger convenant spécialement à un récipient (20) de masque à oxygène à déploiement d'urgence. Ce verrou comporte un nombre de composants minimal et peut être ouvert de multiples façons. Le verrou (38) comprend un ensemble (40) de verrouillage conçu pour être monté dans une boîte (22) recevant le masque à oxygène et un axe (44) de verrouillage concourant fixé sur le couvercle (24). Cet ensemble (40) comprend un corps (46) de verrou principal qui reçoit un diaphragme (48) et un piston (52) capable de se déplacer. L'organe (50) de verrouillage comprend plusieurs éléments (86) de verrouillage en forme de crochets à déplacement latéral, formés de manière à venir s'appliquer contre l'axe (44) de verrouillage. Le piston (52) peut se déplacer dans des directions axiales opposées à l'intérieur de l'organe (52) de verrouillage, et des surfaces coopérantes de cet organe (50) et du piston (52) provoquent un déplacement positif des éléments (86) de verrouillage en réponse au mouvement du piston. Sous l'effet de la pression pneumatique, le piston (52) se déplace à l'intérieur de l'organe (50) de verrouillage, poussé par le diaphragme (48). L'organe (50) de verrouillage, le piston (52) et l'axe (44) de verrouillage sont de préférence sensiblement alignés dans une direction axiale, et un passage (116) dans l'axe (44) de verrouillage permet d'utiliser des tiges (126, 128) de poussée ou de traction pour une ouverture manuelle.

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