Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1997-06-18
1999-08-10
Weiss, John G.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820921, A61M 1600
Patent
active
059342749
ABSTRACT:
The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure. A demand valve is alternatively provided for reducing the pressure of the first selected gas supplied before mixing, but a pressure sensor is also provided downstream of the demand valve for detecting failure of the demand valve, to shut off the supply of the first selected gas to prevent overpressurization.
REFERENCES:
patent: 1488171 (1924-03-01), Savidge
patent: 1498471 (1924-06-01), Miller
patent: 3527213 (1970-09-01), Schreiber
patent: 3599633 (1971-08-01), Beasley
patent: 3889669 (1975-06-01), Weigl
patent: 4023587 (1977-05-01), Dobritz
patent: 4121578 (1978-10-01), Torzala
patent: 4340044 (1982-07-01), Levy et al.
patent: 4380233 (1983-04-01), Caillot
patent: 4587967 (1986-05-01), Chu et al.
patent: 4702240 (1987-10-01), Chaoui
patent: 4823593 (1989-04-01), Furlong et al.
patent: 4832014 (1989-05-01), Perkins
patent: 4932401 (1990-06-01), Perkins
patent: 5014694 (1991-05-01), DeVries
patent: 5107830 (1992-04-01), Younes
patent: 5237990 (1993-08-01), Psaros et al.
patent: 5299568 (1994-04-01), Forare et al.
patent: 5664560 (1997-09-01), Merrick et al.
Gee Glen N.
Merrick Edwin B.
O'Dea John
O'Mahony John
Anderson Charles W.
Puritan-Bennett Corporation
Weiss John G.
LandOfFree
Gas mixing apparatus for a ventilator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas mixing apparatus for a ventilator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas mixing apparatus for a ventilator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1109598