The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 1990
Filed:
Mar. 02, 1989
Guenter Kallies, Hamburg, DE;
Wolfgang Lessat-Kaupat, Hamburg, DE;
Messerschmitt-Boelkow-Blohm GmbH, Munich, DE;
Abstract
The locking mechanism of an aircraft door is linked with a testing device in such a manner that the inoperability of the testing device indicates a failure in the proper locking or latching of the door in its closed position. The testing device may, for example, be a lever which is actuated last in a sequence of door closing and locking or latching steps. Such a lever could, for instance, be the lever for bringing an emergency chute into a ready or stand-by condition. The linkage assures that the testing lever for operating the emergency chute can be activated only if the door is properly closed and latched. As a result, a door that is incompletely closed and/or incompletely latched will provide an immediate indication of that situation.