Controllable valve and inhalation device
First Claim
1. An inhalation device comprising a control means having a flow channel therethrough, the control means keeping the inhalation flow essentially constant during an entire aerosol inhalation by reducing a cross-section of the flow channel, wherein the control means comprises a controllable valve includinga housing,a closure element,a membrane forming a wall of the flow channel, the membrane arching into the flow channel, thereby reducing the cross-section of the flow channel, in response to a lowered pressure within the housing,a pressure plate,a set piston andan adjusting screw secured to the set piston and axially adjustable relative to the housing in order to adjust the flow rate through the controllable valve.
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Accused Products
Abstract
The present invention relates to an improved controllable valve, in particular for an inhalation device, which, e.g., comprises a container for a predetermined aerosol volume, a means for disbursing an aerosol from an aerosol dispenser into the container and a control means that keeps the inhalation flow essentially constant during the entire inhalation. The control means comprises an either continuously or gradually controllable valve so as to limit the flow rate.
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Citations
29 Claims
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1. An inhalation device comprising a control means having a flow channel therethrough, the control means keeping the inhalation flow essentially constant during an entire aerosol inhalation by reducing a cross-section of the flow channel, wherein the control means comprises a controllable valve including
a housing, a closure element, a membrane forming a wall of the flow channel, the membrane arching into the flow channel, thereby reducing the cross-section of the flow channel, in response to a lowered pressure within the housing, a pressure plate, a set piston and an adjusting screw secured to the set piston and axially adjustable relative to the housing in order to adjust the flow rate through the controllable valve.
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16. A controllable valve having a flow channel therethrough for use in an inhalation device, comprising:
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a housing, a membrane, a pressure plate, a closure element, a set piston and an adjusting screw for adjusting a flow rate through the controllable valve, wherein the housing is essentially tubular and comprises a plurality of radially arranged webs, one web being longer than the others, wherein on one side of the webs the housing is designed so as to adjustably receive the set piston in order to adjust the flow rate through the controllable valve and on the opposite side so as to receive the membrane, the optional pressure plate and the closure element, and wherein the membrane forms part of the flow channel and arches into the flow channel in response to a lowered pressure within the housing. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification