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Aerosol metering valves

  • US 5,632,421 A
  • Filed: 07/03/1995
  • Issued: 05/27/1997
  • Est. Priority Date: 07/14/1994
  • Status: Expired due to Fees
First Claim
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1. A metering valve adapted to be secured to an aerosol container in a fluid-tight manner, said valve comprising a metering chamber of fixed volume, a pair of spaced apart gaskets seated at opposite ends of said metering chamber, a valve rod extending through said gaskets in sealing engagement, a spring seat member movable with said valve rod, a biasing spring engaging said spring seat member, a valve body having part thereof circumscribing said spring seat member when in its valve-closed position, with said valve body and said spring seat member forming an annular passage through which liquid product to be dispensed flows en route to said metering chamber, said annular passage being so narrow that it forms a capillary passage which is able to hold liquid in said metering chamber by surface tension.

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