Liquid purification or separation – Filter – Resting on supporting receiver – e.g. – portable
Patent
1992-09-03
1993-10-12
Dawson, Robert A.
Liquid purification or separation
Filter
Resting on supporting receiver, e.g., portable
210478, 210479, B01D 2905
Patent
active
052522113
ABSTRACT:
A support assembly for coffee filters comprises an annular or ring-like member adapted to nest inside the coffee filter basket of an automatic "drip" style coffee machine with the ring member being adapted to fit concentrically inside the circumference of the replaceable filter element in a manner to maintain the filter in engagement against the inside wall of the basket during the coffee brewing cycle. A portion of the ring member is tubular and flexible whereas another portion of the ring comprises a rod having its opposite ends received inside corresponding opposite ends of the tubular portion so that the rod portion may be telescopically displaced relative to the tubular portion. Resilient biasing means in the interior of the tubular portion tends to resist such relative telescopic displacement and urges the ring member to assume its normal diameter. Pressure exerted against the rod overcomes the resilient biasing force and causes it to slide within the tubular ring portion thereby reducing the overall diameter of the ring. The counter-force generated by the resilient biasing means causes the ring member to snugly engage the filter and urge it against the wall of the basket. By this construction, a one-size support assembly according to the present invention will fit most, if not all, sizes of coffee machine basket. In an alternatively preferred embodiment, a bracket assembly attached to the ring member centrally supports a coffee ingredient level indicator and a storage receptacle for additional brewing ingredients.
REFERENCES:
patent: 526331 (1894-09-01), Tobin
patent: 1986957 (1935-01-01), Cargill
patent: 2133178 (1938-10-01), Sieling
patent: 4656932 (1987-04-01), Kopp
Bender S. Michael
Dawson Robert A.
Millard W. L.
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