Microwave coffee maker
AssigneeRaytheon Company
InventorsGeorge Freedman, Robert F. Bowen
Life of this patent
Estimating the term…
Abstract
A coffee brewing appliance for making coffee by the drip method and comprising a reservoir containing a thermally controlled valve adapted to open at a predetermined temperature when heated by water in the reservoir which is subjected to microwave radiation allowing water to flow out of the reservoir onto and through coffee grounds in a filter beneath the valve.
Claims10
A drip-type coffee making appliance for use in a microwave oven comprising a pot having an open upper end, a microwave-transparent reservoir removably seated on the open upper end of the pot for containing water to be heated, said reservoir being transparent to microwave energy and having a bottom wall, a thermal valve sealed within an aperture in said bottom wall and including a valve seat positioned for contact by said water a container removably positioned beneath the valve for holding coffee grounds to be contacted by water passing from the reservoir through the valve to the pot, and means for shielding said thermal valve from microwave energy whereby the valve will operate only in response to changes in temperature of the water.
An appliance for heating a liquid by microwave energy comprising a pot having an open upper end, a microwave-transparent reservoir seated on the open upper end of the pot for containing the liquid to be heated and having a bottom wall, and a thermal valve sealed within an aperture in said bottom wall in thermal contact with liquid in the reservoir, said valve including a normally closed bimetal element adapted to be opened when the liquid is heated to a predetermined temperature by microwave energy, said valve having a first outer circumferential wall portion shaped to interfit with the inner peripheral edge portion of said aperture, the valve further having additional circumferential outer wall portions adjacent the edge of said aperture defining a microwave seal around the valve.
Apparatus for making coffee comprising a source of radiated microwave energy, a coffee brewing device comprising a pot and a reservoir removably seated on the pot, a thermally actuated valve carried by the reservoir, and a removable container positioned beneath the valve for holding coffee grounds to be contacted by water passing from the reservoir through the valve to the pot, said reservoir being transparent to microwave energy and being provided with a bottom wall having an aperture therein, and said valve comprising a valve casing sealed within the aperture and having a vertically extending passageway therethrough, and a bimetal closure member located in normally closing relation to said passageway and movable when heated by said water into open relation to the passageway.
A drip-type coffee making appliance for use in a microwave oven comprising a pot having an open upper end, a microwave-transparent reservoir removably seated on the open upper end of the pot, said reservoir being transparent to microwave energy and having a bottom wall, a thermal valve sealed within an aperture in said bottom wall, and a microwave-transparent container removably positioned beneath the valve for holding coffee grounds to be contacted by water passing from the reservoir through the valve to the pot, said valve comprising a casing sealed within the aperture and having a vertical passageway, and a bimetal disc located in normally closing relation to said passageway and movable when heated by said water into open relation to the passageway.
Dependencies are inferred from the claim text.