AN EGRESS HINGE

• Main Author: ANDREW COLIN DEANE
• Format: Patent
• Language: English
• Published: 16.06.1993
• Subjects: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS ORWINDOWS; FIXED CONSTRUCTIONS; HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS; INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICESFOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTOOPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOTOTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THEWING; KEYS; LOCKS; SAFES; WINDOW OR DOOR FITTINGS

An egress hinge for supporting a vent between a closed position in which it lies within a fixed frame and an open position in which it extends substantially perpendicularly to the fixed frame comprises a first slider 3 and a second slider 5 mounted in a support track 1, a vent arm 7 attached to the first slider 3 via a thrust link 9 and to the second slider 5 via a control link 11 and a brace 13 joining the first slider 3 to a midpoint of the control link 11, wherein restricting means 31 act between the first slider 3 and the support track 1 to limit motion of the first slider 3 along the support track 1 during opening of the hinge, thereby dictating the position of the vent arm 7 in relation to the support track 1 when the hinge is fully open, the restricting means 31 being releasable to allow the first slider 3 and hence the vent arm 7 to move relative to the support track 1 when the hinge is in an open position, and wherein stop means 39 are provided against which the second slider 5 bears as the hinge is closed such that the restricting means 31 automatically relocates in its active position.