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Controllable valve and inhalation device

  • US 7,891,358 B2
  • Filed: 06/29/2006
  • Issued: 02/22/2011
  • Est. Priority Date: 07/06/2005
  • Status: Expired due to Fees
First Claim
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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 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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