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Device for use in beverage extraction machines

  • US 5,327,815 A
  • Filed: 06/16/1992
  • Issued: 07/12/1994
  • Est. Priority Date: 07/05/1991
  • Status: Expired due to Term
First Claim
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1. A fixing ring device for use with a water injection coffee extraction apparatus of the type having an extraction head and a tightening ring disposed about the extraction head, wherein the extraction head has a base, a water injection system opening in the base, a peripheral portion which extends longitudinally from the base, a surface portion which extends laterally from the peripheral portion, and a seal positioned adjacent the surface portion and wherein the tightening ring is fitted to the head and has a portion which extends coaxially about and which is displaced away from the head peripheral portion to form a gap which extends between the head peripheral portion and the tightening ring in which the seal is disposed and wherein the tightening ring has ramps which extend into the gap, the fixing ring device comprising:

  • an annular member in a shape of a ring and having a grill intermediately disposed therein which defines and separates first and second interior portions of the annular member, wherein the annular member has a first interior surface portion which surrounds the first interior portion and which is adapted to be fitted about the peripheral portion of the extraction head and for extending into the gap and to an edge for fitting adjacent the seal and wherein the grill has two opposing surfaces which extend laterally with respect to the first interior surface portion and are connected with the first interior surface portion at a position so that upon the annular member being fitted to the head, the grill has a first surface which is fitted adjacent the extraction head base;

    a plurality of projection elements for piercing a cartridge containing a beverage preparation substance and which are positioned to extend from a second surface of the grill which opposes the first surface in a direction away from the first interior portion;

    an annular member outer surface having lugs which extend therefrom for engaging the ramps of the tightening ring to fix the annular member to the extraction head and tightening ring so that upon being fixed, the edge of the annular member is fitted adjacent the seal and so that the first surface of the grill is positioned adjacent the extraction head base; and

    an annular member inner surface portion which surrounds the second interior portion having ramps which extend therefrom for supporting a cartridge holder for, in turn, supporting a cartridge containing a beverage preparation substance for being pierced by the projection elements and for extracting the beverage preparation substance.

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