US3120843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitor for mechanical respirator
Assignee: Individual
•
Filing: 1959-07-07
•
Granted: 1964-02-11
•
Expires: 1979-07-07
Abstract
No abstract record available.
Inventors
- 👤 Hyman Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:36
CPC Classifications
A; A61; A61H; A61H31/00; A61H31/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
AN ALARM DEVICE FOR A MECHANICAL RESPIRATOR HAVING A PRESSURE CHAMBER FOR CONTAINING A PATIENT IN ITS ATMOSPHERE AND PRESSURE CONTROL APPARATUS TO RAISE AND REDUCE THE PRESSURE IN THE CHAMBER BETWEEN PREDETERMINED MAXIMUM AND MINIMUM MAGNITUDES IN A PREDETERMINED TIME INTERVAL, SAID ALARM DEVICE COMPRISING, IN COMBINATION: PRESSURE-ACTUATED SWITCH MEANS ARRANGED TO MAKE PERIODIC ELECTRICAL CONTACT UPON THE OCCURRENCE OF AT LEAST TWO DIFFERENT PRESSURE MAGNITUDES IN SAID PRESSURE CHAMBER; TIME-DELAY MEANS CONNECTED TO SAID PRESSURE-ACTUATED SWITCH MEANS FOR ENERGIZATION WHENEVER ELECTRICAL CONTACT IS MADE THEREBY, THE INTERVAL BETWEEN SUCCESSIVE CONTACTS OF SAID PRESSURE-ACTUATED SWITCH MEANS BEING SOMEWHAT SMALLER THAN THE PERIOD OF SAID TIME-DELAY MEANS, SAID TIME-DELAY MEANS INCLUDING A RESISTANCECAPACITANCE NETWORK AND AT LEAST ONE DIODE ISOLATION DEVICE HAVING HIGH IMPEDANCE TO CURRENT IN ONE DIRECTION AND
Claim 2
Dependent Claim
130 words
AN ALARM DEVICE FOR A MECHANICAL RESPIRATOR HAVING A PRESSURE CHAMBER FOR CONTAINING A PATIENT IN ITS ATMOSPHERE AND PRESSURE CONTROL APPARATUS TO RAISE AND REDUCE THE PRESSURE IN THE CHAMBER BETWEEN PREDETERMINED MAXIMUM AND MINIMUM MAGNITUDES IN A PREDETERMINED TIME INTERVAL, SAID ALARM DEVICE COMPRISING, IN COMBINATION: PRESSURE-ACTUATED SWITCH MEANS ARRANGED TO MAKE PERIODIC ELECTRICAL CONTACT UPON THE OCCURRENCE OF AT LEAST TWO DIFFERENT PRESSURE MAGNITUDES IN SAID PRESSURE CHAMBER; TIME-DELAY MEANS CONNECTED TO SAID PRESSURE-ACTUATED SWITCH MEANS FOR ENERGIZATION WHENEVER ELECTRICAL CONTACT IS MADE THEREBY, THE INTERVAL BETWEEN SUCCESSIVE CONTACTS OF SAID PRESSURE-ACTUATED SWITCH MEANS BEING SOMEWHAT SMALLER THAN THE PERIOD OF SAID TIME-DELAY MEANS, SAID TIME-DELAY MEANS INCLUDING A RESISTANCECAPACITANCE NETWORK AND AT LEAST ONE DIODE ISOLATION DEVICE HAVING HIGH IMPEDANCE TO CURRENT IN ONE DIRECTION AND
References Cited (Backward Citations)
US2461075A
Cited
US2588192A
Cited
GB745307A
Cited
US2780222A
Cited
US2834953A
Cited
US2867754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |