US4994722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automated door locking system for aircraft lavatory
Assignee: Boeing Co
•
Filing: 1989-10-02
•
Granted: 1991-02-19
•
Expires: 2009-10-02
Abstract
Abstract A system for automatically locking a lavatory door on an aircraft from a remote location comprises means for activating the system, means for sensing the presence of a person in the lavatory, means for locking the lavatory when it is unoccupied and means for selectively overriding the system to allow entry by authorized personnel.
Inventors
- 👤 David C. Dolan
- 👤 Jimmie L. Grimes
- 👤 David C. Broman
- 👤 Kwan-Ho Bae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
E; E05; E05B; E05B47/00; B; B64; B64D; B64D11/00; B64D11/02; E05B2047/0084; E05B63/00; E05B63/0052; Y; Y10; Y10S; Y10S292/00; Y10S292/25; Y10S70/00; Y10S70/51
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A system for locking a door from a remote location comprising: a system switch for activating said system; means for sensing the presence of a person in the area behind said door; means for locking said door when the presence of said person is not sensed by said sensing means; means for overriding said locking means to open said door; and wherein said system remains active until said system switch is turned off.
Claim 2
Independent Claim
73 words
A system for locking a door from a remote location comprising: a system switch for activating said system; means for sensing the presence of a person in the area behind said door; means for locking said door when the presence of said person is not sensed by said sensing means; means for overriding said locking means to open said door; and wherein said system remains active until said system switch is turned off.
References Cited (Backward Citations)
US2237658A
Cited
US2519386A
Cited
US2665129A
Cited
US3753316A
Cited
US4009476A
Cited
JPS5255498A
Cited
US4101886A
Cited
US4415893A
Cited
US4560912A
Cited
US4590410A
Cited
US4458446A
Cited
WO1984001404A1
Cited
US4652862A
Cited
US4577437A
Cited
US4742245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |