Patent DE2525377A1 successfully refreshed from Google Patents.
CA1052659A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Pressure responsive valve structure
Assignee: Sandoz AG
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Filing: 1975-03-26
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Granted: 1979-04-17
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Expires: 1995-03-26
Abstract
Abstract PRESSURE RESPONSIVE VALVE STRUCTURE ABSTRACT OF THE DISCLOSURE A novel pressure responsive valve structure is provided, which includes a housing having at least one aperture for enabling communication between the interior and exterior of the housing. A first duct, for carrying fluid to the valve, terminates within the housing, and a second duct, for carrying fluid from the valve, also terminates within the housing. A diaphragm is affixed in the interior of the housing between the aperture and the duct terminations. The diaphragm is moveable to cover the terminations when the pressure at the aperture exceeds the pressure in the ducts, and is moveable from off the terminations when the pressure in the ducts exceeds the pressure at the aperture.
Inventors
- 👤 Willem J. Kolff
- 👤 Stephen C. Jacobsen
- 👤 Clifford S. Kwan-Gett
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/30; F; F16; F16K; F16K7/00; F16K7/12; F16K7/14; F16K7/17
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
175 words
A pressure responsive valve comprising a housing defining a chamber, said housing have at least one aperture therein to enable communication between the chamber and a reference pressure source, first duct means, one end of which terminates within said chamber, second duct means, one end of which terminates within said chamber, each duct means ter-minating in the same substantially flat plane, and first diaphragm means affixed in said chamber between said aperture and the terminations of said duct means and being moveable to cover the terminations when the reference pressure differs from the pressure in the ducts to thereby prevent the flow of fluid from either duct to the other, and being moveable away from the terminations when the pressure in the ducts is the same as the reference pressure to thereby allow the flow of fluid from either duct to the other, and wherein the first diaphragm means includes a rigid, substantially flat portion for contacting and covering the duct means terminations when the reference pressure differs from the pressure in the duct means.
Claim 2
Dependent Claim
175 words
A pressure responsive valve comprising a housing defining a chamber, said housing have at least one aperture therein to enable communication between the chamber and a reference pressure source, first duct means, one end of which terminates within said chamber, second duct means, one end of which terminates within said chamber, each duct means ter-minating in the same substantially flat plane, and first diaphragm means affixed in said chamber between said aperture and the terminations of said duct means and being moveable to cover the terminations when the reference pressure differs from the pressure in the ducts to thereby prevent the flow of fluid from either duct to the other, and being moveable away from the terminations when the pressure in the ducts is the same as the reference pressure to thereby allow the flow of fluid from either duct to the other, and wherein the first diaphragm means includes a rigid, substantially flat portion for contacting and covering the duct means terminations when the reference pressure differs from the pressure in the duct means.
Claim 3
Dependent Claim
44 words
A valve according to claim 1, further comprising second diaphragm means affixed to the exterior of said housing over said aperture to prevent communication between the chamber and the reference pressure source, said second diaphragm means being moveable conjointly with said first diaphragm means.
Claim 4
Dependent Claim
174 words
A pressure responsive valve comprising a housing defining a chamber, first diaphragm means affixed in said chamber to divide said chamber into first and second compart-ments, said housing having at least one aperture therein to enable communication between the first compartment of the-chamber and a reference pressure source, first and second duct means, one end of each of which terminates within the second compartment of the chamber, and said first diaphragm means including a stem extending therefrom into the second compart-ment of the chamber, and a plate affixed on the end of the stem such that when the pressure in the ducts exceeds the reference pressure, the first diaphragm means is caused to move 50 that the plate covers the terminations of the ducts to thereby prevent the flow of fluid from either duct to the other, and when reference pressure exceeds the pressure in the ducts, the first diaphragm means is caused to move the plate away from the terminations to thereby allow the flow of fluid from either duct to the other.
Claim 5
Dependent Claim
174 words
A pressure responsive valve comprising a housing defining a chamber, first diaphragm means affixed in said chamber to divide said chamber into first and second compart-ments, said housing having at least one aperture therein to enable communication between the first compartment of the-chamber and a reference pressure source, first and second duct means, one end of each of which terminates within the second compartment of the chamber, and said first diaphragm means including a stem extending therefrom into the second compart-ment of the chamber, and a plate affixed on the end of the stem such that when the pressure in the ducts exceeds the reference pressure, the first diaphragm means is caused to move 50 that the plate covers the terminations of the ducts to thereby prevent the flow of fluid from either duct to the other, and when reference pressure exceeds the pressure in the ducts, the first diaphragm means is caused to move the plate away from the terminations to thereby allow the flow of fluid from either duct to the other.
Claim 6
Dependent Claim
44 words
A valve according to claim 3, further comprising a second diaphragm means affixed to the exterior of the housing over said aperture to prevent communication between the chamber and the reference pressure source, said second diaphragm means moveable conjointly with said first diaphragm means.
Claim 7
Dependent Claim
59 words
A valve according to Claim 3 or Claim 4 wherein said first diaphragm means includes a substantially rigid portion to which the stem is attached, wherein each of said duct means terminates in a substantially flat plane, and wherein said plate is substantially flat for contacting and covering the duct termination when the duct pressure exceeds the reference pressure.
Claim 8
Dependent Claim
119 words
In combination in a cannula which includes a central tube, one end of which is tapered for insertion into the body of a patient, a second tube branching from the other end of the central tube for transporting fluid to or from the central tube, and a third tube branching from the other end of the central tube for transporting fluid to or from the central tube, valve means according to claim 1 disposed in said third tube for preventing the flow of fluid when a reference pressure exceeds the pres-sure of the fluid in the third tube and for allowing the flow of fluid when the pressure of the fluid in the third tube exceeds the reference pressure.
Claim 9
Dependent Claim
167 words
The combination of claim 6 wherein said valve means comprises a housing defining a chamber, said housing having at least one aperture therein to enable communication between the chamber and a reference pressure source, first duct means, one end of which terminates within said chamber and the other end of which communicates with one portion of said third tube, second duct means, one end of which terminates within said chamber and the other end of which communicates with the other portion of said third tube, and first diaphragm means fixed inside the chamber between said aperture and the terminations of said duct means and being moveable to cover the terminations when the reference pressure exceeds the pressure in the duct means to thereby prevent the. flow of fluid from either duct means to the other, and being moveable away from the terminations when the pressure in the duct means exceeds the reference pressure to thereby allow the flow of fluid from either duct means to the other.
Claim 10
Dependent Claim
65 words
The combination of Claim 7 further comprising second diaphragm means attached to the exterior of said housing over said aperture to seal the chamber from the reference pressure source, said second diaphragm means being moveable toward said aperture as said first diaphragm means moves to cover the terminations, and being moveable away from said aperture as said first diaphragm means moves away from the terminations.
Claim 11
Dependent Claim
52 words
The combination of Claim 7 or Claim 8 wherein each of said duct means terminates in the same substantially flat plane, and wherein said first diaphragm means includes a rigid, substantially flat portion for contacting and covering the duct means terminations when the reference pressure exceeds the pressure in the duct means.
Claim 12
Dependent Claim
179 words
The combination of Claim 6 wherein said valve means comprises a housing defining a chamber, first diaphragm means affixed in said chamber to divide said chamber into first and second compartments, said housing having at least one aperture therein to enable communication between the first compartment of the chamber and a reference pressure source, first duct means, one end of which terminates within the second compartment of the chamber and the other end of which communicates with one portion of said third tube, second duct means, one end of which terminates within the second compartment of the chamber and the other end of which communicates with the other portion of said tube, said first diaphragm means being moveable to cover the terminations when the pressure in the duct means exceeds the reference pressure to thereby prevent the flow of fluid from either duct means to the other, and being moveable away from the terminations when the reference pressure exceeds the pressure in the duct means to thereby allow the flow of fluid from either duct means to the other.
Claim 13
Dependent Claim
68 words
The combination of Claim 10 further comprising second diaphragm means attached to the exterior of said housing over said aperture to seal the first compartment of the chamber from the reference pressure source, said second diaphragm means being moveable toward said aperture as said first diaphragm means moves away from the terminations, and moveable away from said aperture as said first diaphragm means moves to cover the terminations.
References Cited (Backward Citations)
No citation records indexed.
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