US3604415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patient ventilator
Assignee: Foregger Co Inc
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Filing: 1969-04-14
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Granted: 1971-09-14
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Expires: 1989-04-14
Abstract
Abstract A ventilator for artificial respiration is automatically controlled by a fluid logic circuit comprising three pneumatic logic cells, all fed directly with ventilating gas under pressure, and two delay cells for separately adjusting gas flow to the periods of inhalation and exhalation of a patient.
Inventors
- 👤 Richard J Hoenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:51
CPC Classifications
A; A61; A61M; A61M16/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
218 words
A respirator system comprising: a. a source of breathing gas under pressure, b. an applicator device for supplying said breathing gas to a patient, c. a first fluid logic cell having an inlet connected to said source of breathing gas and an outlet connected to said applicator device, said first fluid logic cell having actuator means for opening and closing said cell to the passage of breathing gas therethrough to said applicator device, d. a pair of second and third fluid logic cells, one of said pair of fluid logic cells being normally open and including actuator means to close said cell, the other of said pair being normally closed and including actuator means to open said cell, e. a pair of fluid pressure signal delay means, f. passage means operatively connecting said pair of second and third fluid logic cells to each other and to said pair of pressure signal delay means for applying delayed fluid pressure signals to said actuator means for alternately opening and closing said second and third fluid logic cells, and g. passage means connecting one of said pair of fluid logic cells to the actuator means of said first logic cell for alternately opening and closing said first fluid logic cell and thereby intermittently passing breathing gas therethrough to said applicator device.
Claim 2
Dependent Claim
218 words
A respirator system comprising: a. a source of breathing gas under pressure, b. an applicator device for supplying said breathing gas to a patient, c. a first fluid logic cell having an inlet connected to said source of breathing gas and an outlet connected to said applicator device, said first fluid logic cell having actuator means for opening and closing said cell to the passage of breathing gas therethrough to said applicator device, d. a pair of second and third fluid logic cells, one of said pair of fluid logic cells being normally open and including actuator means to close said cell, the other of said pair being normally closed and including actuator means to open said cell, e. a pair of fluid pressure signal delay means, f. passage means operatively connecting said pair of second and third fluid logic cells to each other and to said pair of pressure signal delay means for applying delayed fluid pressure signals to said actuator means for alternately opening and closing said second and third fluid logic cells, and g. passage means connecting one of said pair of fluid logic cells to the actuator means of said first logic cell for alternately opening and closing said first fluid logic cell and thereby intermittently passing breathing gas therethrough to said applicator device.
Claim 3
Dependent Claim
40 words
The respirator system as claimed in claim 1 further including variable fluid flow means for varying the rate of fluid flow to each of said delay means for varying the time periods of each of said delayed fluid pressure signals.
Claim 4
Dependent Claim
41 words
The respirator system as claimed in claim 1 wherein said first fluid logic cell is normally open, and said normally closed fluid logic cell is connected to the actuator means of said first fluid logic cell by said passage means (g).
Claim 5
Dependent Claim
79 words
The respirator system as claimed in claim 3 wherein each of said second and third fluid logic cells include fluid outlets, the outlet of said normally open fluid logic cell being connected through one of said delay means to the actuator means of said normally closed fluid logic cell, and the outlet of said normally closed fluid logic cell being connected through the other of said delay means to the actuator means of said normally open fluid logic cell.
Claim 6
Dependent Claim
71 words
The respirator system as claimed in claim 1 wherein said second and third fluid logic cells include vent means, said vent means being operatively connected to said delay means by said passage means (f) for alternately venting fluid pressure from one of said delay means when said normally open fluid logic cell is closed, and from the other of said delay means when said normally closed fluid logic cell is closed.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |