Patent US3703172A successfully refreshed from Google Patents.
US3703172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heated vaporizer anesthesia machine
Assignee: Airco Inc
•
Filing: 1970-06-26
•
Granted: 1972-11-21
•
Expires: 1990-06-26
Abstract
Abstract An anesthesia machine which utilizes a plurality of vaporizers, each individually adapted to be heated to a constant temperature when in use and governed by a shut-off valve assembly. The oxygen carrier passes from a source through a pressure regulator, needle valve, flowmeter calibrated in flowrate of oxygen to a by-pass valve and, thereafter, to a gas fluid circuit in parallel, one branch of which permits unadulterated oxygen flow therethrough when the pressure exceeds a predetermined level and the other branch of which is divided into three subbranches in parallel via a manifold, each sub-branch including a needle valve, flowmeter calibrated in flowrate of vapor, and a vaporizer containing liquid anesthetic agent. All branches join for passage through an altitude compensator valve operating on a back pressure principle to maintain the pressure in the upstream side of the compensator at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream portion of the system on the upstream portion.
Inventors
- 👤 Wayne W Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:35
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/14; A61M16/18; A61M16/104; A61M16/1075; A61M16/109
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
306 words
An anesthesia machIne comprising an oxygen source, a supply line leading from said source to a by-pass valve, said supply line including a pressure regulator, a needle valve, and flow meter adapted to measure flow rate of oxygen, said by-pass valve comprising a body having a through-bore and a partial bore transverse to said through-bore, said partial bore communicating with said through-bore and an exterior surface of said valve, pressure responsive means reversibly closing said partial bore, said supply line being secured to said valve at one end of said through-bore, a first outlet line being secured at one end to said valve at the other end of said through-bore, a second outlet line being secured at one end to said valve at the point of communication of said partial bore with said valve exterior surface, said first outlet line including a needle valve, a flow meter adapted to measure flow rate of oxygen, said first line being secured at its other end to a first opening in a vaporizer, said vaporizer including a liquid anesthetic agent, means for introducing said agent into said vaporizer, means maintaining said agent at a given constant temperature, means for bubbling oxygen received from said first outlet line through said agent, and a second opening in said vaporizer, a third outlet line being secured at one end in said second opening for removal of oxygen and vaporized agent, said third outlet line merging with said second outlet line, said merged line communicating with a breathing circuit directly feeding a patient and altitude compensator means in said merged line for maintaining the pressure in said merged line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 2
Dependent Claim
306 words
An anesthesia machIne comprising an oxygen source, a supply line leading from said source to a by-pass valve, said supply line including a pressure regulator, a needle valve, and flow meter adapted to measure flow rate of oxygen, said by-pass valve comprising a body having a through-bore and a partial bore transverse to said through-bore, said partial bore communicating with said through-bore and an exterior surface of said valve, pressure responsive means reversibly closing said partial bore, said supply line being secured to said valve at one end of said through-bore, a first outlet line being secured at one end to said valve at the other end of said through-bore, a second outlet line being secured at one end to said valve at the point of communication of said partial bore with said valve exterior surface, said first outlet line including a needle valve, a flow meter adapted to measure flow rate of oxygen, said first line being secured at its other end to a first opening in a vaporizer, said vaporizer including a liquid anesthetic agent, means for introducing said agent into said vaporizer, means maintaining said agent at a given constant temperature, means for bubbling oxygen received from said first outlet line through said agent, and a second opening in said vaporizer, a third outlet line being secured at one end in said second opening for removal of oxygen and vaporized agent, said third outlet line merging with said second outlet line, said merged line communicating with a breathing circuit directly feeding a patient and altitude compensator means in said merged line for maintaining the pressure in said merged line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 3
Dependent Claim
306 words
An anesthesia machIne comprising an oxygen source, a supply line leading from said source to a by-pass valve, said supply line including a pressure regulator, a needle valve, and flow meter adapted to measure flow rate of oxygen, said by-pass valve comprising a body having a through-bore and a partial bore transverse to said through-bore, said partial bore communicating with said through-bore and an exterior surface of said valve, pressure responsive means reversibly closing said partial bore, said supply line being secured to said valve at one end of said through-bore, a first outlet line being secured at one end to said valve at the other end of said through-bore, a second outlet line being secured at one end to said valve at the point of communication of said partial bore with said valve exterior surface, said first outlet line including a needle valve, a flow meter adapted to measure flow rate of oxygen, said first line being secured at its other end to a first opening in a vaporizer, said vaporizer including a liquid anesthetic agent, means for introducing said agent into said vaporizer, means maintaining said agent at a given constant temperature, means for bubbling oxygen received from said first outlet line through said agent, and a second opening in said vaporizer, a third outlet line being secured at one end in said second opening for removal of oxygen and vaporized agent, said third outlet line merging with said second outlet line, said merged line communicating with a breathing circuit directly feeding a patient and altitude compensator means in said merged line for maintaining the pressure in said merged line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 4
Dependent Claim
306 words
An anesthesia machIne comprising an oxygen source, a supply line leading from said source to a by-pass valve, said supply line including a pressure regulator, a needle valve, and flow meter adapted to measure flow rate of oxygen, said by-pass valve comprising a body having a through-bore and a partial bore transverse to said through-bore, said partial bore communicating with said through-bore and an exterior surface of said valve, pressure responsive means reversibly closing said partial bore, said supply line being secured to said valve at one end of said through-bore, a first outlet line being secured at one end to said valve at the other end of said through-bore, a second outlet line being secured at one end to said valve at the point of communication of said partial bore with said valve exterior surface, said first outlet line including a needle valve, a flow meter adapted to measure flow rate of oxygen, said first line being secured at its other end to a first opening in a vaporizer, said vaporizer including a liquid anesthetic agent, means for introducing said agent into said vaporizer, means maintaining said agent at a given constant temperature, means for bubbling oxygen received from said first outlet line through said agent, and a second opening in said vaporizer, a third outlet line being secured at one end in said second opening for removal of oxygen and vaporized agent, said third outlet line merging with said second outlet line, said merged line communicating with a breathing circuit directly feeding a patient and altitude compensator means in said merged line for maintaining the pressure in said merged line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 5
Dependent Claim
63 words
The combination set forth in claim 1 wherein said first outlet line further includes secondary outlet lines connected thereto and being secured to a plurality of vaporizers, each vaporizer having first means independent of the other vaporizers to open and close said first vaporizer opening, and second means joining said first means and preventing use of more than one vaporizer at a time.
Claim 6
Dependent Claim
22 words
The combination set forth in claim 1 wherein said predetermined amount above average sea level atmospheric pressure is about 40 mm. Hg.
Claim 7
Dependent Claim
169 words
An anesthesia machine comprising an oxygen source, a gas fluid system supply line running from said source into at least one vaporizer and from said at least one vaporizer to a breathing circuit, said supply line including at least one needle valve, by-pass means associated with said gas fluid system supply line adapted to direct a portion of the oxygen from said oxygen source to the breathing circuit, a flow meter adapted to measure total flow rate of oxygen from said oxygen source, a flow meter in said supply line adapted to measure flow rate of oxygen for vaporizing liquid anesthetic agent, means maintaining said liquid agent at a predetermined constant temperature, and altitude compensator means located between said at least one vaporizer and said breathing circuit for maintaining the pressure in said supply line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 8
Dependent Claim
169 words
An anesthesia machine comprising an oxygen source, a gas fluid system supply line running from said source into at least one vaporizer and from said at least one vaporizer to a breathing circuit, said supply line including at least one needle valve, by-pass means associated with said gas fluid system supply line adapted to direct a portion of the oxygen from said oxygen source to the breathing circuit, a flow meter adapted to measure total flow rate of oxygen from said oxygen source, a flow meter in said supply line adapted to measure flow rate of oxygen for vaporizing liquid anesthetic agent, means maintaining said liquid agent at a predetermined constant temperature, and altitude compensator means located between said at least one vaporizer and said breathing circuit for maintaining the pressure in said supply line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 9
Dependent Claim
195 words
An anesthesia machine comprising an oxygen source, a gas fluid system supply line running from said source into a plurality of vaporizers and from said plurality of vaporizers to a breathing circuit, first means associated with each of said plurality of vaporizers for permitting flow therethrough, second means joining said first means and preventing use of more than one of said plurality of vaporizers at a time, said supply line including at least one needle valve, by-pass means associated with said gas fluid system supply line adapted to direct a portion of the oxygen from Said oxygen source to the breathing circuit, a flow meter adapted to measure total flow rate of oxygen, a flow meter adapted to measure flow rate of oxygen for vaporizing liquid anesthetic agent, means maintaining said liquid agent at a predetermined constant temperature; and altitude compensator means in said gas fluid supply system immediately upstream of said breathing circuit for maintaining the pressure in said supply line at a predetermined amount above sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 10
Dependent Claim
195 words
An anesthesia machine comprising an oxygen source, a gas fluid system supply line running from said source into a plurality of vaporizers and from said plurality of vaporizers to a breathing circuit, first means associated with each of said plurality of vaporizers for permitting flow therethrough, second means joining said first means and preventing use of more than one of said plurality of vaporizers at a time, said supply line including at least one needle valve, by-pass means associated with said gas fluid system supply line adapted to direct a portion of the oxygen from Said oxygen source to the breathing circuit, a flow meter adapted to measure total flow rate of oxygen, a flow meter adapted to measure flow rate of oxygen for vaporizing liquid anesthetic agent, means maintaining said liquid agent at a predetermined constant temperature; and altitude compensator means in said gas fluid supply system immediately upstream of said breathing circuit for maintaining the pressure in said supply line at a predetermined amount above sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 11
Dependent Claim
227 words
An anesthetic machine comprising a gas fluid system supply line adapted to receive oxygen from an oxygen source and to supply an anesthetic fluid combined with the oxygen to a breathing circuit, said supply line including at least one valve means adapted to control the total flow of oxygen from the oxygen source, by-pass means associated with said gas fluid system supply line adapted to direct a portion of the oxygen from the oxygen source to the breathing circuit, a flow meter in said supply line adapted to measure total flow rate of oxygen from the oxygen source, an anesthetic vaporizer in said supply line containing a liquid anesthetic agent, a flow meter in said supply line adapted to measure flow rate of oxygen for vaporizing the liquid anesthetic agent, an electrical resistance heater adapted to heat the liquid agent within said vaporizer, control means adapted to sense the temperature of the liquid agent for controlling the resistance heater whereby the liquid agent is maintained at a predetermined constant temperature and, altitude compensator means in said gas fluid supply system immediately upstream of the breathing circuit for maintaining the pressure in said supply line at a predetermined amount above sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 12
Dependent Claim
227 words
An anesthetic machine comprising a gas fluid system supply line adapted to receive oxygen from an oxygen source and to supply an anesthetic fluid combined with the oxygen to a breathing circuit, said supply line including at least one valve means adapted to control the total flow of oxygen from the oxygen source, by-pass means associated with said gas fluid system supply line adapted to direct a portion of the oxygen from the oxygen source to the breathing circuit, a flow meter in said supply line adapted to measure total flow rate of oxygen from the oxygen source, an anesthetic vaporizer in said supply line containing a liquid anesthetic agent, a flow meter in said supply line adapted to measure flow rate of oxygen for vaporizing the liquid anesthetic agent, an electrical resistance heater adapted to heat the liquid agent within said vaporizer, control means adapted to sense the temperature of the liquid agent for controlling the resistance heater whereby the liquid agent is maintained at a predetermined constant temperature and, altitude compensator means in said gas fluid supply system immediately upstream of the breathing circuit for maintaining the pressure in said supply line at a predetermined amount above sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 13
Dependent Claim
23 words
An anesthetic machine as defined in claim 6 wherein said predetermined amount above average sea level atmospheric pressure is about 40 mm. Hg.
Claim 14
Dependent Claim
296 words
An anesthetic machine comprising a vaporizer adapted to contain an anesthetic liquid therein, said vaporizer having an inlet and an outlet, an electrical resistance heater within said vaporizer, means responsive to the temperature of the anesthetic liquid within said vaporizer to control said heater to maintain the anesthetic liquid at a predetermined constant temperature, a first supply line having one end thereof adapted to connect to a source of oxygen and having the other end thereof connected to said vaporizer inlet, valve means in said first supply line for controlling the total flow of oxygen from the oxygen source, a flow meter in said first supply line adapted to measure the total flow rate of oxygen from the oxygen source, a flow meter in said first supply line adapted to measure flow rate of oxygen for vaporizing the liquid anesthetic agent, an outlet line having one end connected to said vaporizer outlet to receive anesthetic vapor therefrom for delivery to a patient circuit, by-pass means in said first supply line adapted to direct a portion of the oxygen from the oxygen source to said outlet line, a second supply line having one end adapted to be connected to a source of second fluid and the other end communicating with said outlet line, said second supply line having a valve means to control the flow of the second fluid and a flow meter to measure the flow of said second fluid, and altitude compensator means in said outlet line immediately upstream of the patient circuit for maintaining the pressure in said outlet line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 15
Dependent Claim
296 words
An anesthetic machine comprising a vaporizer adapted to contain an anesthetic liquid therein, said vaporizer having an inlet and an outlet, an electrical resistance heater within said vaporizer, means responsive to the temperature of the anesthetic liquid within said vaporizer to control said heater to maintain the anesthetic liquid at a predetermined constant temperature, a first supply line having one end thereof adapted to connect to a source of oxygen and having the other end thereof connected to said vaporizer inlet, valve means in said first supply line for controlling the total flow of oxygen from the oxygen source, a flow meter in said first supply line adapted to measure the total flow rate of oxygen from the oxygen source, a flow meter in said first supply line adapted to measure flow rate of oxygen for vaporizing the liquid anesthetic agent, an outlet line having one end connected to said vaporizer outlet to receive anesthetic vapor therefrom for delivery to a patient circuit, by-pass means in said first supply line adapted to direct a portion of the oxygen from the oxygen source to said outlet line, a second supply line having one end adapted to be connected to a source of second fluid and the other end communicating with said outlet line, said second supply line having a valve means to control the flow of the second fluid and a flow meter to measure the flow of said second fluid, and altitude compensator means in said outlet line immediately upstream of the patient circuit for maintaining the pressure in said outlet line at a predetermined amount above average sea level atmospheric pressure by damping the effect of pressure fluctuations occurring in the downstream side of said compensator means upon the upstream side of said compensator means.
Claim 16
Dependent Claim
23 words
An anesthetic vAporizer as defined in claim 8 wherein said predetermined amount above average sea level atmospheric pressure is about 40 mm. Hg.
References Cited (Backward Citations)
US2046633A
Cited
US2156823A
Cited
US2407221A
Cited
US2586677A
Cited
US2866455A
Cited
US2870764A
Cited
US3021840A
Cited
US3128764A
Cited
US3215140A
Cited
FR1375946A
Cited
US3420232A
Cited
US3521634A
Cited
US3502077A
Cited
US3528418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |