Reciprocating electromagnetic micro-pump, particularly for...

Details Reciprocating electromagnetic micro-pump, particularly for... Reciprocating electromagnetic micro-pump, particularly for...

2004-02-12

2008-08-19

Freay, Charles G (Department: 3746)

Pumps

With condition responsive pumped fluid control

Bypass or relief valve controls venting by movable pump...

C417S296000, C417S417000

Reexamination Certificate

active

07413415

ABSTRACT:
Reciprocating electromagnetic micro-pump, particularly for small electrical appliances, whose pumping chamber is defined by a tubular element, movable axially, against the action of a contrasting spring, between an advanced position of normal operation of the pump and a retracted position in which the outlet fitting of the pump is placed in communication with the cavity of the hollow body within which is movable in reciprocating fashion the core bearing the piston and which in turn communicates with the inlet fitting of the pump, in such a way as to absorb and anomalous overpressures generated, in operation, downstream of the pump.

REFERENCES:
patent: 4169695 (1979-10-01), Masuda et al.
patent: 4934907 (1990-06-01), Kroner
patent: 6942470 (2005-09-01), Versini
patent: 19 14 879 (1970-10-01), None
patent: 43 28 621 (1995-03-01), None
patent: 1 205 663 (2002-05-01), None
patent: WO 03/027454 (2003-04-01), None

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