Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closure checks
Patent
1995-05-02
1997-11-18
Howell, Daniel W.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Closure checks
137493, 188312, E05F 502
Patent
active
056874529
ABSTRACT:
A snubber is disclosed for use on an airplane translating door hinge arm (13) comprising a hydraulic device (41) and a flow regulation system (40). The hinge arm (13) includes sprockets (25, 27) placed at the ends (15, 17) of the hinge arm (13). Roller chain pieces (31) rotate partially about the sprockets (25, 27). A pneumatic actuator (33) having a through-rod (37) and housing (35) is located on one side of the hinge arm (13). The actuator housing (35) is supported by a support member (23) integral with the hinge arm (13). The ends of the actuator through-rod (43) are each coupled to first ends of each of the roller chain pieces (31). The hydraulic device (41) comprising a housing (47), a through-rod (43), a piston 45, a first compartment (49), a second compartment (51), and hydraulic fluid, is also supported by the support member (23). The ends of the hydraulic device through-rod (43) are each coupled to second ends of each of the roller chain pieces (31). The hydraulic device (41) is located on the side of the hinge arm (13) opposite the side having the actuator (33). Also provided is a snubber fluid flow regulation system (40) comprising first and second flow regulators (59, 65) and first and second high pressure relief valves (61, 67), one each for use during door opening and door closing. A compensator (71) is also provided in the fluid flow regulation system (40) to hydraulically compensate the snubber (41) during temperature changes and to supply make-up fluid in case there is external leakage.
REFERENCES:
patent: 3561574 (1971-02-01), Dickinson et al.
patent: 3638885 (1972-02-01), Reed
patent: 3739808 (1973-06-01), Landherr
patent: 4084668 (1978-04-01), Rybicki
patent: 5178240 (1993-01-01), Houghton
patent: 5529152 (1996-06-01), Hamilton et al.
Conner Michael P.
Franklin Donald K.
Hamatani Tomio
Kim Sun Gil
Howell Daniel W.
Kirkman Christopher
The Boeing Company
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