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:
Mar. 11, 1997
Filed:
May. 15, 1995
The Boeing Company, Seattle, WA (US);
Abstract
A thrust reverser synchronization shaft lock system that includes a sync lock control valve (50) and two hydraulically controlled sync locks (60) attached to the synchronization shafts (5) of a jet engine thrust reverser system, is disclosed. The thrust reverser system further comprises an isolation valve (45), a directional control valve (47), a plurality of actuators (19), and synchronization shafts (5). The sync locks (60) are capable via the synchronization shafts (5) of preventing the actuators (19) from deploying the thrust reversers of the jet engines. The sync locks (60) remain in a locked state until an independent control signal sent from the flight deck positively instructs the sync lock control valve (50) to unlock the sync locks (60), ensuring that the unlocking of the sync locks (60) corresponds to a valid thrust reverser deploy signal. The sync locks (60) each comprise a housing (65), a connection means to one of the synchronization shafts (5), a rotating jaw (75) for connection to one of the synchronization shafts (5), a sliding jaw (81), an unlock latch (106), a lock spring (87), and a manual release mechanism (99). Normally the lock spring (87) causes teeth on the sliding jaw (81) to engage teeth on the rotating jaw (75). Hydraulic pressure forces the sliding jaw (81) to move away from the rotating jaw (75) to unlock the sync locks 60.