US3630197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Respiratory valve of nonrebreathing type for use in anaesthesia apparatus
Assignee: Individual
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Filing: 1968-11-29
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Granted: 1971-12-28
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Expires: 1988-11-29
Abstract
Abstract This respiratory valve of nonrebreathing type consists of a oneway inspiratory valve for gas coming from the gas-feeding mouth and a expiratory valve capable to close gas exhaust induction holes in a expiratory valve seat when pressed by the spring, both provided in a valve casing which includes at one end a gasfeeding mouth connected with a anesthesia apparatus and at the other end a delivery mouth to be connected with a patient. When the patient inhales the inspiratory valve opens while the expiratory valve closes so that the anesthetic gas is fed to the patient from the apparatus, and when the patient exhales the inspiratory valve closes while the expiratory valve opens to release the breathing out into the open.
Inventors
- 👤 Tukiko Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/20; A61M16/208; F; F16; F16K; F16K15/00; F16K15/14; F16K15/141; F16K15/142; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7841
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
382 words
A respiratory valve assembly of the nonrebreathing type for use in an anesthesia apparatus, comprising: a valve housing having an internal valve chamber and an inlet passage, one end of said inlet passage communicating with said chamber and the other end of said inlet passage being connectable to a gas-feeding source; said housing further having a flow passage therein, one end of said flow passage communicating with said chamber and the other end of said flow passage being adapted for communication with a patient''s mouth; said housing still further including a discharge passage having an inlet end communicating with said chamber and an outlet end communicating with a location disposed externally of said housing; first one-way check valve means biased to a normally closed position and coacting with said inlet passage for permitting flow of gas through said inlet passage into said chamber when the pressure in said inlet passage exceeds the pressure in the chamber by a predetermined amount, said first one-way check valve means preventing flow of gas in the opposite direction; second one-way check valve means biased to a normally closed position and coacting with said discharge passage for permitting flow of gas from said chamber into said discharge passage whenever (1) exhaust gases are supplied to said chamber through said flow passage due to exhaling and (2) excess inlet gases are supplied to said chamber through said inlet passage, said second one-way check valve means including first biasing means for opening said second one-Way check valve means only when the pressure in said chamber downstream of said first oneway check valve means exceeds a predetermined maximum; and control valve means including a movable control valve member coacting with said discharge passage for preventing flow of gas from said chamber into said discharge passage when said first check valve means is open and gases are flowing from said inlet passage into said flow passage, said control valve means including second biasing means for moving said control valve member to an open position when the pressure in the inlet passage exceeds the pressure in the chamber by said predetermined differential and the pressure within said chamber exceeds said predetermined maximum for permitting excess inlet gases supplied to said chamber through said inlet passage to be discharged through said discharge passage.
Claim 2
Dependent Claim
382 words
A respiratory valve assembly of the nonrebreathing type for use in an anesthesia apparatus, comprising: a valve housing having an internal valve chamber and an inlet passage, one end of said inlet passage communicating with said chamber and the other end of said inlet passage being connectable to a gas-feeding source; said housing further having a flow passage therein, one end of said flow passage communicating with said chamber and the other end of said flow passage being adapted for communication with a patient''s mouth; said housing still further including a discharge passage having an inlet end communicating with said chamber and an outlet end communicating with a location disposed externally of said housing; first one-way check valve means biased to a normally closed position and coacting with said inlet passage for permitting flow of gas through said inlet passage into said chamber when the pressure in said inlet passage exceeds the pressure in the chamber by a predetermined amount, said first one-way check valve means preventing flow of gas in the opposite direction; second one-way check valve means biased to a normally closed position and coacting with said discharge passage for permitting flow of gas from said chamber into said discharge passage whenever (1) exhaust gases are supplied to said chamber through said flow passage due to exhaling and (2) excess inlet gases are supplied to said chamber through said inlet passage, said second one-way check valve means including first biasing means for opening said second one-Way check valve means only when the pressure in said chamber downstream of said first oneway check valve means exceeds a predetermined maximum; and control valve means including a movable control valve member coacting with said discharge passage for preventing flow of gas from said chamber into said discharge passage when said first check valve means is open and gases are flowing from said inlet passage into said flow passage, said control valve means including second biasing means for moving said control valve member to an open position when the pressure in the inlet passage exceeds the pressure in the chamber by said predetermined differential and the pressure within said chamber exceeds said predetermined maximum for permitting excess inlet gases supplied to said chamber through said inlet passage to be discharged through said discharge passage.
Claim 3
Dependent Claim
153 words
A valve assembly according to claim 1, wherein said control valve member is movably disposed in said chamber and said second biasing means comprising spring means urging said control valve member into a first position, said control valve member being movable from said first position to a second position preventing communication between said chamber and said discharge passage in response to flow through said inlet passage; and said first one-way check valve means including a first valve member disposed within said chamber and mounted for movement relative to said control valve member, said first valve member being normally maintained in a closed position for preventing flow from said inlet passage to said chamber and being movable to an open position in response to said predetermined pressure differential thereacross for permitting flow from said inlet passage into said chamber and through said discharge passage when said control valve member is in said first position.
Claim 4
Dependent Claim
69 words
A valve assembly according to claim 1, wherein said control valve member comprises a rigid platelike valve member movably disposed within said chamber and said second biasing means comprising spring means resiliently urging said platelike valve member toward one end position; and said second one-way check valve means including a rigid platelike valve member and said first biasing means comprising spring means normally urging same to a closed position.
Claim 5
Dependent Claim
118 words
A valve assembly according to claim 1, wherein said valve housing includes means defining first and second opposed valve seats, said first valve seat being disposed in surrounding relationship to said one end of said inlet passage, and said second valve seat being disposed in surrounding relationship to the inlet end of said discharge passage; and said valve member being disposed within said chamber and movable between a first position wherein said control valve member is in seating engagement with said first valve seat and a second position wherein said control valve member is in seating engagement with said second valve seat, and second biasing means comprising resilient means urging said control valve member toward said first position.
Claim 6
Dependent Claim
102 words
A valve assembly according to claim 4, wherein said housing includes a seat member having said discharge passage extending therethrough, said second one-way check valve means comprising a check valve member movably mounted on said housing, and said first biasing means comprising spring means resiliently urging said check valve member into seating engagement with said seat member for closing one end of said discharge passage, and said control valve member being adapted to sealingly contact a further surface of said seat member for closing the other end of said discharge passage when said control valve member is moved to said second position.
Claim 7
Dependent Claim
76 words
A valve assembly according to claim 4, wherein said first one-way check valve means includes an opening extending through said control valve member and communicating with said inlet passage and a first valve member mounted on and movable relative to said control valve member for normally closing said openiNg, said first valve member being movable to an open position so as to uncover said opening in response to the flow of gas through said inlet passage.
Claim 8
Dependent Claim
60 words
A valve assembly according to claim 6, wherein said control valve member comprises a rigid platelike disk provided with a plurality of openings in the center thereof, and said first valve member comprises a thin flexible plastic disk fixedly secured to said platelike disk substantially adjacent the center thereof and disposed for normally overlapping and closing said plurality of openings.
Claim 9
Dependent Claim
66 words
A valve assembly according to claim 6, wherein said housing includes means defining a third valve seat in surrounding relationship to a portion of said discharge passage, and said second one-way check valve means includes a second movable valve member and said first biasing means comprising resilient means coacting with said second valve member for normally urging same into seating engagement with said third valve seat.
Claim 10
Dependent Claim
188 words
A valve assembly according to claim 6, wherein said housing is comprised of first and second housing members having first and second flange portions, respectively, which are spaced from one another, with said inlet passage and said flow passage being provided in said first and second housing members, respectively, and said passages being substantially coaxially aligned; said housing further including a cylindrical ringlike member extending between and fixedly secured to said first and second flange portions, and a seat member disposed axially between said first and second flange portions and fixedly secured to at least one of said second housing member and said ringlike member, whereby said seat member and said first flange portion define said chamber therebetween, and said seat member and said second flange portion defining a compartment therebetween with said compartment comprising a portion of said discharge passage; and said discharge passage includes a first plurality of ports extending through said seat member to provide communication between said chamber and said compartment, and a second plurality of circumferentially spaced ports extending through said ringlike member for providing communication between said compartment and said external location.
Claim 11
Dependent Claim
88 words
A valve assembly according to claim 9, wherein said second one-way check valve means comprises an annular ringlike valve member movably disposed within said compartment, and said first biasing means comprising spring means resiliently urging said ringlike valve member into seating engagement with said seat member for closing said first plurality of ports, and said control valve member being adapted to sealingly contact the opposite side of said seat member for closing said first plurality of ports when said control valve member is moved to said second position.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |