Coffee-making device with pressure control
First Claim
1. Coffee-making device (1, 51), comprising a coffee supply line, a hot water supply line (7) with a pump, a drink outlet (26) with shut-off valve, and a coffee outlet, said coffee-making device comprises a brewing compartment for holding coffee, which brewing compartment is connected to said water supply line and to said beverage outlet, said brewing compartment comprising a cylinder in which a piston is capable of reciprocating, characterized in that said shut-off valve is designed to provide either a first passage with relatively small surface or a second passage with relatively large surface, and in that said pump is designed to provide an appropriate first, small volume displacement at high pressure and a second, large volume displacement at low pressure.
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Accused Products
Abstract
Coffee-making device with a piston/cylinder unit, the piston (3) being driven by a crankshaft (11). A swivelling arm structure (13) is also driven by means of the crankshaft, with the interposition of a cam/cam follower mechanism. The swivelling arm structure is provided with a cover (19) for closing off the free end of the cylinder (2). The cover can be pressed onto the cylinder by means of a cam structure.
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Citations
16 Claims
- 1. Coffee-making device (1, 51), comprising a coffee supply line, a hot water supply line (7) with a pump, a drink outlet (26) with shut-off valve, and a coffee outlet, said coffee-making device comprises a brewing compartment for holding coffee, which brewing compartment is connected to said water supply line and to said beverage outlet, said brewing compartment comprising a cylinder in which a piston is capable of reciprocating, characterized in that said shut-off valve is designed to provide either a first passage with relatively small surface or a second passage with relatively large surface, and in that said pump is designed to provide an appropriate first, small volume displacement at high pressure and a second, large volume displacement at low pressure.
Specification