초록 ▼

A latch-lock mechanism for an airplane cargo door (34) is disclosed. The latch-lock mechanism includes straight-through drive shafts rotated by a common powered drive unit (61). Affixed to the outer ends of the drive shafts are pull-in hooks (67) that co-act with pull-in pins affixed to the fuselage

A latch-lock mechanism for an airplane cargo door (34) is disclosed. The latch-lock mechanism includes straight-through drive shafts rotated by a common powered drive unit (61). Affixed to the outer ends of the drive shafts are pull-in hooks (67) that co-act with pull-in pins affixed to the fuselage of the airplane adjacent to the sides of the cargo door opening. The co-action between the pull-in hooks and the pull-in pins pulls the cargo door into a closed position against a distorted fuselage cargo door opening. During opening, the co-action between the pull-in hooks and the pull-in pins force the door open against ice jams. After being pulled into a closed position, latch cams (89) rotated by the drive shafts are closed around latch pins (131). Thereafter, lock pawls (159) are moved into a closed position. The latch-lock mechanism also includes witness ports (193) located in the cargo door (34) that enable a mechanic to verify that the lock pawls (159) are in the closed position. The lock pawls (159) are prevented from closing unless they "feel" that the associated latch cam (89) is closed. The latch-lock handle mechanism also includes a lock handle housing (141) that must be opened in order to access a manual drive 90.degree. gear box (71) used to manually operate the power drive unit (61) and, thus, rotate the drive shafts. Further, mechanical fusing is provided to prevent the application of excessive manual force to the latch-lock mechanism. The lock handle housing (141) is closed by a lock handle (203) having latch whose holding force must be overcome by a pull force, which eliminates the possibility of the door being opened by hydrodynamic water pressure.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] In a latch-lock mechanism for a load carrying airplane cargo door that includes a plurality of latch cams located along the closing edge of the cargo door, a plurality of latch pin

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] In a latch-lock mechanism for a load carrying airplane cargo door that includes a plurality of latch cams located along the closing edge of the cargo door, a plurality of latch pins located along the closing edge of the cargo door's doorway in alignment with the latch cams, a power drive unit (PDU) mounted on the cargo door for rotating the latch cams between an unlatched position whereat said latch cams do not prevent said cargo door from opening and a latched position whereat said latch cams engage said latch pins and prevent said door from opening, first mechanical coupling for coupling the PDU to the latch cams, a plurality of lock elements associated with said plurality of latch cams and latch pins, a lock handle for moving said plurality of lock elements between a locked position and an unlocked position and second mechanical coupling for coupling the latch handle to the plurality of lock elements, the improvement comprising:said first mechanical coupling including straight-through drive shafts mounted on said cargo door and extending outwardly from either side of said PDU to the sides of the cargo door, ending at the latch cams; andsaid lock elements comprising lock pawls positioned and constructed such that said lock pawls cannot be moved into a locked position unless said latch cams are in their latched position.