Two-way draining valve for coffee making machines

Details Two-way draining valve for coffee making machines Two-way draining valve for coffee making machines

1993-06-16

1994-04-05

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

99300, 137517, 137843, F16K 1504

Patent

active

052995950

ABSTRACT:
A two-way draining valve for coffee making machines includes an L-shaped housing containing a chamber, an inlet opening for delivering water to the chamber from a pump, an outlet opening arranged in an upper leg of the housing for delivering water from the chamber to a boiler inlet, and a draining bore arranged in a lower leg of the housing and communicating with the chamber. A spherical rubber valve ball is arranged within the chamber and is movable with respect to the draining bore in response to changes in pressure in the chamber. The ball opens and closes the draining bore in accordance with the chamber pressure to enable excess steam and water from the boiler and the pump, and excess air from the pump to exit the chamber via the draining bore. Thus, pressure within the boiler is controlled to prevent dripping of the coffee making machine.

REFERENCES:
patent: 3322145 (1967-05-01), Prosser
patent: 4258801 (1981-03-01), Poston
patent: 4700732 (1987-10-01), Fracisco

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