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Brewing means for a coffee machine

  • US 5,146,839 A
  • Filed: 02/04/1991
  • Issued: 09/15/1992
  • Est. Priority Date: 02/08/1990
  • Status: Expired due to Fees
First Claim
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1. Brewing apparatus for a coffee making machine, comprising a housing defining a brewing chamber, the brewing chamber housing having an opening at an upper end thereof;

  • a closing element adapted to close said opening;

    a hot water conduit being fluidly connected by a flow path to said brewing chamber for supplying pressurized hot water to said brewing chamber for brewing ground coffee disposable in said brewing chamber;

    seal means being disposed between said closing element and said housing, said seal means extending around said opening of said brewing chamber housing for sealing said brewing chamber, said seal means including a seal member disposed on one of said closing element and said housing, and a sealing seat attached to the other of said closing element and said housing, said seal member including a flexible membrane defining with said one of said closing element and said housing, a sealing chamber, at least a wall portion of said sealing chamber facing toward said sealing seat being formed by said flexible membrane; and

    a channel connecting said sealing chamber to said supply conduit for subjecting said sealing chamber and said flexible membrane to said pressure of said hot water, said flexible membrane being elastically deformable towards and pressed against said sealing seat by said hot water pressure.

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