Patent US3871371A successfully refreshed from Google Patents.
US3871371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiration supply and control
Assignee: Puritan Bennett Corp
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Filing: 1972-12-11
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Granted: 1975-03-18
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Expires: 1992-12-11
Abstract
Abstract A system including apparatus and method for supplying and controlling a selected breathing gas mixture in proper amounts at a selected cycle rate with a high degree of accuracy including a console with gas supply and control units at a substantial distance from the patient and a transfer unit in proximity to the patient. The gas supply hose from the console to the transfer unit is long and of large volume, while the delivery hose from the transfer unit to the patient is very short and of relatively small volume. Control valves for the supply and return flow paths are in the transfer unit and are actuated by remote control means in the console. Thus, the major part of the machine compliance is eliminated, and the system makes it possible to accurately control the volume of gas delivered to a patient. The transfer unit includes a pressure sensor for continually monitoring pressure and a temperature sensor.
Inventors
- 👤 James Weigl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:58
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/021; A61M16/022; A61M16/024; A61M16/20; A61M16/201; A61M16/202; A61M16/203; A61M16/204; A61M16/206; A61M16/208; A61M16/209
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A respiration supply and control system comprising: a console provided with a volume generator to supply a desired respiration gas mixture at a selected cycle rate for use by a patient located at a substantial distance from the console; a transfer unit to receive the gas and transmit it to the patient; an elongate, large volume, gas supply hose interconnecting the volume generator and the transfer unit; a relatively short, small volume, delivery hose extending from the transfer unit and adapted to be placed in flow communication with the patient; valve means in the transfer unit to control the flow of gas therefrom to the patient; an actuator on the transfer unit for the valve means; and control means on the console and connected to the actuator to control its operation.
Claim 2
Dependent Claim
131 words
A respiration supply and control system comprising: a console provided with a volume generator to supply a desired respiration gas mixture at a selected cycle rate for use by a patient located at a substantial distance from the console; a transfer unit to receive the gas and transmit it to the patient; an elongate, large volume, gas supply hose interconnecting the volume generator and the transfer unit; a relatively short, small volume, delivery hose extending from the transfer unit and adapted to be placed in flow communication with the patient; valve means in the transfer unit to control the flow of gas therefrom to the patient; an actuator on the transfer unit for the valve means; and control means on the console and connected to the actuator to control its operation.
Claim 3
Dependent Claim
86 words
A system as claimed in claim 1 further including: an elongate, large volume, gas return hose interconnecting the transfer unit and the console; a relatively short, small volume, expiration hose extending from the transfer unit and also adapted to be placed in flow communication with the patient; second valve means in the transfer unit to control the flow of gas from the expiration hose to the gas return hose; and control means on the console and connected to the second valve means to control its operation.
Claim 4
Dependent Claim
25 words
A system as claimed in claim 2 further including: a spirometer on the console flow connected to the downstream end of the gas return hose.
Claim 5
Dependent Claim
33 words
A system as claimed in claim 2 further including: a pressure sensor is flow connected to the expiration hose upstream of the second valve means; and means for displaying sensed pressure versus time.
Claim 6
Dependent Claim
228 words
A respiration supply and control system, comprising: a console provided with a volume generator to supply a desired respiration gas mixture at a selected cycle rate for use by a patient located at a substantial distance from the console; a transfer unit to receive the gas and transmit it to the patient; an elongate, large volume, gas supply hose interconnecting said volume generator and said transfer unit; a relatively short, small volume, delivery hose extending from said transfer unit and adapted to be placed in flow communication with the patient; valve means in said transfer unit to control the flow of gas therefrom to the patient; an actuator on said transfer unit for said valve means; control means on said console and connected to said actuator to control its operation; heating means for said gas supply hose; a first temperature sensor provided at said transfer unit in communication with the gas flowing through the outlet end of said hose; a second temperature sensor provided at said console in communication with the gas flowing through the inlet end of said hose; a comparator at said console, connected to both of said sensors to determine temperature differences; and a temperature controller located at said console and connected to said heating means to activate it in response to an indicated temperature drop between the inlet and outlet ends of said hose.
Claim 7
Dependent Claim
228 words
A respiration supply and control system, comprising: a console provided with a volume generator to supply a desired respiration gas mixture at a selected cycle rate for use by a patient located at a substantial distance from the console; a transfer unit to receive the gas and transmit it to the patient; an elongate, large volume, gas supply hose interconnecting said volume generator and said transfer unit; a relatively short, small volume, delivery hose extending from said transfer unit and adapted to be placed in flow communication with the patient; valve means in said transfer unit to control the flow of gas therefrom to the patient; an actuator on said transfer unit for said valve means; control means on said console and connected to said actuator to control its operation; heating means for said gas supply hose; a first temperature sensor provided at said transfer unit in communication with the gas flowing through the outlet end of said hose; a second temperature sensor provided at said console in communication with the gas flowing through the inlet end of said hose; a comparator at said console, connected to both of said sensors to determine temperature differences; and a temperature controller located at said console and connected to said heating means to activate it in response to an indicated temperature drop between the inlet and outlet ends of said hose.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |