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Low-profile automatic injection device with self-emptying reservoir

  • US 6,074,369 A
  • Filed: 05/07/1999
  • Issued: 06/13/2000
  • Est. Priority Date: 02/20/1998
  • Status: Expired due to Term
First Claim
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1. A device for containing and discharging a liquid preparation comprising:

  • a) a reservoir comprising two Belleville spring diaphragms, wherein each Belleville spring diaphragm includes an outer annular portion and a central disk portion which is thinner than the outer annular portion and the Belleville spring diaphragms are bonded together at an outer edge of each Belleville spring diaphragm such that a liquid contained within the reservoir is maintained under pressure by the Belleville spring diaphragms;

    b) an aperture in the reservoir for allowing discharge of the liquid from the reservoir; and

    c) means for sealing the aperture until discharge of the liquid is desired.

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