Disclosed is an increased strength dogging mechanism operable by a handle for releasably securing a door on each side of the door to a structure. The dogging mechanism includes a plurality of dog keepers each having a ramp portion and a seating portion mounted to each side of the door. A dog having a...http://www.google.es/patents/US6123370?utm_source=gb-gplus-sharePatente US6123370 - Increased strength dogging mechanism
