Pump and measuring device for coffee machines with threaded pist

Details Pump and measuring device for coffee machines with threaded pist Pump and measuring device for coffee machines with threaded pist

1991-09-24

1993-03-09

Kashnikow, Andres

Dispensing

Automatic control

Motor control

2221465, 222309, 417415, B67D 508

Patent

active

051920018

ABSTRACT:
The invention is a pump for coffee machines which simultaneously carries out the functions of water measurer and heater.
The pump consists of a cylinder with a piston inside which sucks the water from a tank and directs it towards the devices it serves, and in which there are electronic devices for the control of the run of the piston and the consequent measurement of the water. The piston is moved by a piston rod which is externally threaded and forms part of a circulating ball actuator.
Heating takes place by way of a resistance coiled around the cylinder jacket with the whole in turn enveloped by an insulating covering.

REFERENCES:
patent: 477642 (1892-06-01), Brunthaver
patent: 1374263 (1921-04-01), Watson
patent: 3208388 (1965-09-01), Glasgow
patent: 3390815 (1968-07-01), Kavan et al.
patent: 3620134 (1971-11-01), Conlon et al.
patent: 3825155 (1974-07-01), Morault
patent: 4447707 (1984-05-01), Baker
patent: 4566868 (1986-01-01), Menzies
patent: 5062547 (1991-11-01), Zahner et al.
patent: 5087352 (1992-02-01), Cole

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