US3781843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bed guard system
Assignee: Lockheed Martin Corp
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Filing: 1971-04-15
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Granted: 1973-12-25
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Expires: 1991-04-15
Abstract
Abstract Apparatus is provided for alerting nurses that a patient is attempting to leave his bed, comprising members having a fluid filled passageway therein which can be attached to the top of the side rails and footboard of a bed. The members are coupled via lines to transducers which activate an alarm when a predetermined volume of fluid is displaced.
Inventors
- 👤 W Harrison
- 👤 R Purington
- 👤 D Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:12
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/05; A61G7/0507; A61B; A61B5/00; A61B5/103; A61B5/11; A61B5/1113; A61B5/1115; A61G7/052; G; G08; G08B; G08B7/00; G08B7/04; A61B5/68; A61B5/6887; A61B5/6891; Y; Y10; Y10S; Y10S5/00; Y10S5/94
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
68 words
Apparatus for indicating that a person is attempting to leave his bed, comprising: at least one bed guard rail detector having a fluid therein; a transducer coupled to said bed guard rail detector and responsive to fluid displaced from said bed guard rail detector; and means coupled to said transducer for providing an indication when a predetermined amount of fluid is displaced from said bed guard rail detector.
Claim 2
Dependent Claim
68 words
Apparatus for indicating that a person is attempting to leave his bed, comprising: at least one bed guard rail detector having a fluid therein; a transducer coupled to said bed guard rail detector and responsive to fluid displaced from said bed guard rail detector; and means coupled to said transducer for providing an indication when a predetermined amount of fluid is displaced from said bed guard rail detector.
Claim 3
Dependent Claim
33 words
Apparatus as defined in claim 1, wherein said bed guard rail detector includes a length of resilient tubing closed at one end and means associated therewith for attaching said tubing to a bed.
Claim 4
Dependent Claim
52 words
Apparatus as defined in claim 1, wherein said bed guard rail detector includes a resilient member closed at one end and having a hollow portion filled with a fluid, said hollow portion being a predetermined size to displace a predetermined amount of fluid when a predetermined force is applied to said detector.
Claim 5
Dependent Claim
12 words
Apparatus as defined in claim 1, wherein said transducer is a bellows.
Claim 6
Dependent Claim
36 words
Apparatus as defined in claim 1, wherein said transducer includes a housing having a rolling diaphragm therein and a piston arranged in said rolling diaphragm whereby fluid entering said diaphragm will cause movement of said piston.
Claim 7
Dependent Claim
45 words
Apparatus as defined in claim 1, wherein said indicator means includes a trip arm arranged adjacent said transducer for movement therewith and a toggle device coupled to said trip arm whereby a predetermined movement of said trip arm will cause said toggle device to trip.
Claim 8
Dependent Claim
17 words
Apparatus as defined in claim 6, further including means for adjusting the sensitivity of said toggle device.
Claim 9
Dependent Claim
30 words
Apparatus as defined in claim 6, wherein said indicator means further includes contact means arranged proximate said toggle device to make electrical contact therewith when said toggle device is tripped.
Claim 10
Dependent Claim
18 words
Apparatus as defined in claim 6, wherein said indicator means further includes means for providing a distinctive alarm.
Claim 11
Dependent Claim
16 words
Apparatus as defined in claim 8, further including means coupling said contact means to an alarm.
Claim 12
Dependent Claim
77 words
Apparatus for providing a signal to a patient call-box signifying that a patient is attempting to leave his bed, comprising: at least one bed guard rail detector arranged on said bed said bed guard rail detector including a resilient member having a fluid therein; a bed guard control unit; first means for coupling said bed guard rail detector to said bed guard control unit; and second means coupling said bed guard control unit to said patient call-box.
Claim 13
Dependent Claim
77 words
Apparatus for providing a signal to a patient call-box signifying that a patient is attempting to leave his bed, comprising: at least one bed guard rail detector arranged on said bed said bed guard rail detector including a resilient member having a fluid therein; a bed guard control unit; first means for coupling said bed guard rail detector to said bed guard control unit; and second means coupling said bed guard control unit to said patient call-box.
Claim 14
Dependent Claim
79 words
Apparatus as defined in claim 11, wherein said bed guard control unit includes: at least one transducer coupled to said first coupling means; a toggle device; means coupling the motion of said transducer to said toggle device, whereby said toggle device will be tripped when a predetermined amount of fluid is displaced from said bed guard rail detector; and means closing an electrical contact upon tripping of said toggle device, said contact closure coupled to said second coupling means.
Claim 15
Dependent Claim
17 words
Apparatus as defined in claim 12, further including means for adjusting the sensitivity of said toggle device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |