VALVE FOR INFLATABLE CHAMBER OF MEDICAL DEVICE
First Claim
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1. A medical device comprising an inflatable chamber, an inlet port for inflation fluid, and a one-way valve located in the chamber and communicating with the inlet port for controlling the flow of inflation fluid through the inlet port, the valve comprising:
- a. a wall portion having an opening therein communicating with the inlet port; and
b. a film panel comprising;
a first portion attached to the wall portion for anchoring the film panel; and
a second portion that (i) overlaps the inlet port and at least a part of the wall portion, (ii) is unattached to the wall portion so as to be displaceable relative to the wall portion in response to a differential fluid pressure between the pressure in the inflatable chamber and the pressure at the inlet port, (iii) has a chamber facing surface that is exposed to fluid pressure in the inflatable chamber such that said fluid pressure in the inflatable chamber urges the second portion of the film panel into sealing contact with the wall portion to obstruct escape of inflation fluid from the inflatable chamber, and (iv) has an inlet facing surface that is exposed to fluid pressure at the inlet port such that said fluid pressure at the inlet port urges the second portion of the film panel to lift away from the wall portion for admitting inflation fluid through the inlet port.
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Accused Products
Abstract
A medical device such as an ostomy appliance has an inflatable seal for sealing an opening in a patient'"'"'s body. A non-return valve is provided at an inlet port for admitting inflation fluid into the inflatable seal and for preventing escape of the inflation fluid.
37 Citations
43 Claims
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1. A medical device comprising an inflatable chamber, an inlet port for inflation fluid, and a one-way valve located in the chamber and communicating with the inlet port for controlling the flow of inflation fluid through the inlet port, the valve comprising:
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a. a wall portion having an opening therein communicating with the inlet port; and
b. a film panel comprising;
a first portion attached to the wall portion for anchoring the film panel; and
a second portion that (i) overlaps the inlet port and at least a part of the wall portion, (ii) is unattached to the wall portion so as to be displaceable relative to the wall portion in response to a differential fluid pressure between the pressure in the inflatable chamber and the pressure at the inlet port, (iii) has a chamber facing surface that is exposed to fluid pressure in the inflatable chamber such that said fluid pressure in the inflatable chamber urges the second portion of the film panel into sealing contact with the wall portion to obstruct escape of inflation fluid from the inflatable chamber, and (iv) has an inlet facing surface that is exposed to fluid pressure at the inlet port such that said fluid pressure at the inlet port urges the second portion of the film panel to lift away from the wall portion for admitting inflation fluid through the inlet port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A one-way valve for an inflatable seal of a medical device, the one-way valve comprising:
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a. an inlet port for inflation fluid;
b. a wall portion having an opening therein communicating with the inlet port; and
c. a film panel comprising;
a first portion attached to the wall portion for anchoring the film panel, and a second portion that (i) overlaps the inlet port and at least a part of the wall portion, (ii) is unattached to the wall portion so as to be displaceable relative to the wall portion in response to a differential fluid pressure between the pressure in the inflatable seal and the pressure at the inlet port, (iii) has a seal facing surface that is exposed to fluid pressure in the inflatable seal such that said fluid pressure in the inflatable seal urges the second portion of the film panel into sealing contact with the wall portion to obstruct escape of inflation fluid from the inflatable seal, and (iv) has an inlet facing surface that is exposed to fluid pressure at the inlet port such that said fluid pressure at the inlet port urges the second portion of the film panel to lift away from the wall portion for admitting inflation fluid into the inflatable seal.
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41. An inflatable seal for an ostomy appliance, the inflatable seal comprising:
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a. a substrate;
b. an inflatable membrane supported by the substrate and defining an inflatable chamber, the inflatable membrane having a stoma engaging surface for engaging a stoma to obstruct stomal discharge when the inflatable membrane is inflated in use;
c. an inlet port in the substrate; and
d. a one-way valve located in the chamber and communicating with the inlet port for controlling the flow of inflation fluid through the inlet port, the valve comprising;
a wall portion having an opening therein communicating with the inlet port; and
a film panel comprising;
a first portion attached to the wall portion for anchoring the film panel, and a second portion that (i) overlaps the inlet port and at least a part of the wall portion, (ii) is unattached to the wall portion so as to be displaceable relative to the wall portion in response to a differential fluid pressure between the pressure in the inflatable chamber and the pressure at the inlet port, (iii) has a chamber facing surface that is exposed to fluid pressure in the inflatable chamber such that said fluid pressure in the inflatable chamber urges the second portion of the film panel into sealing contact with the wall portion to obstruct escape of inflation fluid from the inflatable chamber, and (iv) has an inlet facing surface that is exposed to fluid pressure at the inlet port such that said fluid pressure at the inlet port urges the second portion of the film panel to lift away from the wall portion for admitting inflation fluid through the inlet port. - View Dependent Claims (42, 43)
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Specification