Patent US5685296A successfully refreshed from Google Patents.
US5685296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow regulating valve and method
Assignee: Respironics Inc
•
Filing: 1995-04-21
•
Granted: 1997-11-11
•
Expires: 2015-04-21
Abstract
Abstract A flow regulating system including a valve and a method for maintaining a constant gas flow rate through a patient circuit to ambient exhaust at varying gas pressure by means of differential gas pressure applied to opposed sides of a valve diaphragm.
Inventors
- 👤 Ronald J. Zdrojkowski
- 👤 Frank V. Blazek
- 👤 John Raymond Pujol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20; A61M16/201; A61M16/206; A62; A62B; A62B9/00; A62B9/02; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/0113
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
In a method of providing a supply of breathing gas under pressure for breathing by a user, the steps comprising: providing a flow of such breathing gas through a supply path which extends from a breathing gas source to the airway of the user; maintaining a varying pressure of said breathing gas flow within said supply path at selected elevated pressures which vary in magnitude over a given time interval; and passing an essentially continuous exhaust flow of said varying pressure breathing gas from said supply path to ambient pressure at an essentially constant flow rate throughout said given time interval.
Claim 2
Dependent Claim
101 words
In a method of providing a supply of breathing gas under pressure for breathing by a user, the steps comprising: providing a flow of such breathing gas through a supply path which extends from a breathing gas source to the airway of the user; maintaining a varying pressure of said breathing gas flow within said supply path at selected elevated pressures which vary in magnitude over a given time interval; and passing an essentially continuous exhaust flow of said varying pressure breathing gas from said supply path to ambient pressure at an essentially constant flow rate throughout said given time interval.
Claim 3
Dependent Claim
40 words
The method as set forth in claim 1 wherein said essentially continuous exhaust flow of gas is maintained at a flow rate essentially equal to the average flow rate of said supply flow of breathing gas within said supply path.
Claim 4
Dependent Claim
165 words
In a method of continuously supplying breathing gas at elevated pressure from a breathing gas source for breathing by a user, the steps comprising: providing a continuous flow of such breathing gas through a supply path which extends from the breathing gas source to the airway of the user; maintaining the pressure of said breathing gas flow at selected elevated pressures which vary in magnitude during a given time interval to provide a continuous flow of varying pressure breathing gas within said supply path for breathing by the user; and continuously passing a portion of said varying pressure breathing gas by way of a valve means from said supply path to an ambient pressure environment at an essentially constant flow rate throughout said given time interval; whereby said continuous supplying of breathing gas exhibits the characteristics of varying pressure of said breathing gas flow and simultaneously an essentially constant rate of flow of said breathing gas from said supply path to said ambient pressure environment.
Claim 5
Dependent Claim
165 words
In a method of continuously supplying breathing gas at elevated pressure from a breathing gas source for breathing by a user, the steps comprising: providing a continuous flow of such breathing gas through a supply path which extends from the breathing gas source to the airway of the user; maintaining the pressure of said breathing gas flow at selected elevated pressures which vary in magnitude during a given time interval to provide a continuous flow of varying pressure breathing gas within said supply path for breathing by the user; and continuously passing a portion of said varying pressure breathing gas by way of a valve means from said supply path to an ambient pressure environment at an essentially constant flow rate throughout said given time interval; whereby said continuous supplying of breathing gas exhibits the characteristics of varying pressure of said breathing gas flow and simultaneously an essentially constant rate of flow of said breathing gas from said supply path to said ambient pressure environment.
References Cited (Backward Citations)
US3429342A
Cited
US3474831A
Cited
US3473571A
Cited
US3467136A
Cited
US3592237A
Cited
US3948289A
Cited
US3951379A
Cited
US4182371A
Cited
US4280527A
Cited
US4234013A
Cited
US4354516A
Cited
US4351510A
Cited
US5148802A
Cited
US5239995A
Cited
US5148802B1
Cited
US5161525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-10 | 2001-05-12 | 2001-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-10 | 2005-05-12 | 2005-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-10 | 2009-05-12 | 2009-11-11 | $7700.00 | Window Closed / Lapsed |