Pneumatically-operated gas demand apparatus
First Claim
1. In combination with a nebulizer for producing a medicament-containing aerosol and a source of pressurized gas, an intermittent gas delivery device disposed between and in intermittent fluid communication with the nebulizer and the source of pressurized gas, comprising:
- (a) a regulator mechanism in continuous fluid communication with and disposed downstream of the source of pressurized gas;
(b) a bolus chamber structure defining a bolus chamber therein and disposed downstream of and in fluid communication with said regulator mechanism;
(c) a supply orifice element having a supply orifice formed therethrough, said supply orifice element disposed between said regulator mechanism and said bolus chamber, said supply orifice providing fluid communication between said regulator mechanism and said bolus chamber; and
(d) a supply valve in downstream fluid communication with said supply orifice and operative to move between a flow-blocking position whereby the pressurized gas is prevented from flowing from the source to the nebulizer and a flow-supplying position whereby the pressurized gas flows from the source to the nebulizer such that a high flow pulse of pressurized gas first generates a fine-mist plume of the medicament-containing aerosol in the nebulizer and subsequently a steady state flow of pressurized gas continues to produce the fine-mist plume of the medicament-containing aerosol in the nebulizer until said supply valves moves to the flow-blocking position.
1 Assignment
0 Petitions
Accused Products
Abstract
A pneumatically-operated gas demand apparatus coupled in interruptible fluid communication between a recipient and a first source of a pressurized first gas controls delivery of the first gas to the recipient as the recipient inhales and exhales and comprises a supply valve and a sensing valve. The supply valve has a first interior chamber divided by a flexible first diaphragm into a supply chamber region and a control chamber region. The supply chamber region is in interruptible fluid communication between the first source of the first gas and the recipient. The control chamber region is in continuous fluid communication with a second source of a pressurized second gas. The sensing valve has a second interior chamber divided by a flexible second diaphragm into a venting chamber region and a sensing chamber region. The venting chamber region is in interruptible fluid communication between the control chamber region and an ambient air environment. The sensing chamber region is in continuous fluid communication with the recipient. When the recipient inhales, the second diaphragm moves to a flow-causing position to cause the second gas to flow into the ambient air environment and causes the first diaphragm to move to a flow-supplying position thereby delivering the first gas to the recipient. When the recipient exhales, the second diaphragm moves to a flow-stopping position to prevent the second gas to flow into the ambient air environment and causes the first diaphragm to move to a flow-blocking position thereby preventing delivery of the first gas to the recipient.
-
Citations
13 Claims
-
1. In combination with a nebulizer for producing a medicament-containing aerosol and a source of pressurized gas, an intermittent gas delivery device disposed between and in intermittent fluid communication with the nebulizer and the source of pressurized gas, comprising:
-
(a) a regulator mechanism in continuous fluid communication with and disposed downstream of the source of pressurized gas; (b) a bolus chamber structure defining a bolus chamber therein and disposed downstream of and in fluid communication with said regulator mechanism; (c) a supply orifice element having a supply orifice formed therethrough, said supply orifice element disposed between said regulator mechanism and said bolus chamber, said supply orifice providing fluid communication between said regulator mechanism and said bolus chamber; and (d) a supply valve in downstream fluid communication with said supply orifice and operative to move between a flow-blocking position whereby the pressurized gas is prevented from flowing from the source to the nebulizer and a flow-supplying position whereby the pressurized gas flows from the source to the nebulizer such that a high flow pulse of pressurized gas first generates a fine-mist plume of the medicament-containing aerosol in the nebulizer and subsequently a steady state flow of pressurized gas continues to produce the fine-mist plume of the medicament-containing aerosol in the nebulizer until said supply valves moves to the flow-blocking position. - View Dependent Claims (2, 3, 4)
-
-
5. A pneumatically-operated gas demand apparatus coupled in interruptible fluid communication between a recipient and a first source of a pressurized first gas and adapted for controlling delivery of the first gas to the recipient as the recipient inhales and exhales, comprising:
-
(a) a supply valve including a supply valve housing defining a first interior chamber formed therein and a flexible first diaphragm member disposed within said first interior chamber and connected to said supply valve housing in a manner to divide said first interior chamber into a supply chamber region and a control chamber region, said supply chamber region being in interruptible fluid communication with and between the first source of the first gas and the recipient, said control chamber region being in continuous fluid communication with a second source of a pressurized second gas, said first diaphragm member operative to hermetically seal said supply chamber region and said control chamber region from one another and to move between a flow-blocking position and a flow-supplying position; (b) a sensing valve including a sensing valve housing defining a second interior chamber formed therein and a flexible second diaphragm member disposed within said second interior chamber and connected to said sensing valve housing in a manner to divide said second interior chamber into a venting chamber region and a sensing chamber region, said venting chamber region being in interruptible fluid communication with and between said control chamber region of said first interior chamber of said supply valve and an ambient air environment, said sensing chamber region being in continuous fluid communication with the recipient, said second diaphragm member operative to hermetically seal said venting chamber region and said sensing chamber region from one another and responsive when the recipient inhales and exhales to move between a flow-stopping position and a flow-causing position whereby, when the recipient inhales, said second diaphragm member is in the flow-causing position thereby causing the second gas to flow from said control chamber region, through said venting chamber region and into the ambient air environment which, in turn, causes said first diaphragm member to be in the flow-supplying position thereby delivering the first gas from the first source of pressurized first gas to the recipient and, when the recipient exhales, said second diaphragm member is in the flow-stopping position thereby preventing the second gas to flow from said control chamber region, through said venting chamber region and into the ambient air environment which, in turn, causes said first diaphragm member to be in the flow-blocking position thereby preventing delivery of the first gas to the recipient; (c) a pilot orifice element having a pilot orifice extending therethrough, said pilot orifice element disposed between the second source of pressurized second gas and said control chamber region of said supply valve, said pilot orifice providing fluid communication between the second source of pressurized second gas and said control chamber region; (d) a regulator mechanism disposed between and in interruptible fluid communication with the first source of the first gas and said supply chamber region of said supply valve; and (e) a bolus chamber structure defining a bolus chamber therein and disposed between and in fluid communication with said regulator mechanism and said supply chamber region of said supply valve. - View Dependent Claims (6, 7, 8, 9, 10)
-
-
11. A pneumatically-operated gas demand apparatus coupled in interruptible fluid communication between a recipient and a first source of a pressurized first gas and adapted for controlling delivery of the first gas to the recipient as the recipient inhales and exhales, comprising:
-
(a) a supply valve including a supply valve housing defining a first interior chamber formed therein and a flexible first diaphragm member disposed within said first interior chamber and connected to said supply valve housing in a manner to divide said first interior chamber into a supply chamber region and a control chamber region, said supply chamber region being in interruptible fluid communication with and between the first source of the first gas and the recipient, said control chamber region being in continuous fluid communication with a second source of a pressurized second gas, said first diaphragm member operative to hermetically seal said supply chamber region and said control chamber region from one another and to move between a flow-blocking position and a flow-supplying position; (b) a sensing valve including a sensing valve housing defining a second interior chamber formed therein and a flexible second diaphragm member disposed within said second interior chamber and connected to said sensing valve housing in a manner to divide said second interior chamber into a venting chamber region and a sensing chamber region, said venting chamber region being in interruptible fluid communication with and between said control chamber region of said first interior chamber of said supply valve and an ambient air environment, said sensing chamber region being in continuous fluid communication with the recipient, said second diaphragm member operative to hermetically seal said venting chamber region and said sensing chamber region from one another and responsive when the recipient inhales and exhales to move between a flow-stopping position and a flow-causing position whereby, when the recipient inhales, said second diaphragm member is in the flow-causing position thereby causing the second gas to flow from said control chamber region, through said venting chamber region and into the ambient air environment which, in turn, causes said first diaphragm member to be in the flow-supplying position thereby delivering the first gas from the first source of pressurized first gas to the recipient and, when the recipient exhales, said second diaphragm member is in the flow-stopping position thereby preventing the second gas to flow from said control chamber region, through said venting chamber region and into the ambient air environment which, in turn, causes said first diaphragm member to be in the flow-blocking position thereby preventing delivery of the first gas to the recipient; (c) a supply orifice element having a supply orifice formed therethrough, said supply orifice element disposed between said first source of the first gas and said supply chamber region of said supply valve, said supply orifice providing fluid communication between said first source of pressurized first gas and said supply chamber region of said supply valve; and (d) a bolus chamber structure defining a bolus chamber therein and disposed between and in fluid communication with supply orifice element and said supply chamber region of said supply valve.
-
-
12. A pneumatically-operated gas demand apparatus coupled in interruptible fluid communication between a recipient and a first source of a pressurized first gas and adapted for controlling delivery of the first gas to the recipient as the recipient inhales and exhales, comprising:
-
(a) a supply valve including a supply valve housing defining a first interior chamber formed therein and a flexible first diaphragm member disposed within said first interior chamber and connected to said supply valve housing in a manner to divide said first interior chamber into a supply chamber region and a control chamber region, said supply chamber region being in interruptible fluid communication with and between the first source of the first gas and the recipient, said control chamber region being in continuous fluid communication with a second source of a pressurized second gas, said first diaphragm member operative to hermetically seal said supply chamber region and said control chamber region from one another and to move between a flow-blocking position and a flow-supplying position; (b) a sensing valve including a sensing valve housing defining a second interior chamber formed therein and a flexible second diaphragm member disposed within said second interior chamber and connected to said sensing valve housing in a manner to divide said second interior chamber into a venting chamber region and a sensing chamber region, said venting chamber region being in interruptible fluid communication with and between said control chamber region of said first interior chamber of said supply valve and an ambient air environment, said sensing chamber region being in continuous fluid communication with the recipient, said second diaphragm member operative to hermetically seal said venting chamber region and said sensing chamber region from one another and responsive when the recipient inhales and exhales to move between a flow-stopping position and a flow-causing position whereby, when the recipient inhales, said second diaphragm member is in the flow-causing position thereby causing the second gas to flow from said control chamber region, through said venting chamber region and into the ambient air environment which, in turn, causes said first diaphragm member to be in the flow-supplying position thereby delivering the first gas from the first source of pressurized first gas to the recipient and, when the recipient exhales, said second diaphragm member is in the flow-stopping position thereby preventing the second gas to flow from said control chamber region, through said venting chamber region and into the ambient air environment which, in turn, causes said first diaphragm, member to be in the flow-blocking position thereby preventing delivery of the first gas to the recipient; (c) a regulator mechanism disposed between and in interruptible fluid communication with the source of pressurized oxygen and said supply chamber region of said supply valve; and (d) a bolus chamber structure defining a bolus chamber therein and disposed between and in fluid communication with said regulator mechanism and said supply chamber region of said supply valve. - View Dependent Claims (13)
-
Specification