Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
2006-08-24
2010-10-26
Kramer, Devon C (Department: 3746)
Pumps
Motor driven
Electric or magnetic motor
Reexamination Certificate
active
07819642
ABSTRACT:
A reciprocatory fluid pump includes an armature assembly which is reciprocatably mounted to the housing by a pair of spaced leaf springs extending parallel to each other and fixed at their opposite ends to the armature assembly and housing, respectively, so as to define therewith a four-sided parallelogram in which the pair of leaf springs serve as two parallel sides, and the armature assembly and housing, respectively, serve as the other two parallel sides. The leaf springs are of flat rectangular configuration constraining the reciprocatory movement of the armature assembly to longitudinal displacement with a small transverse displacement. The housing includes a base, and the pair of leaf springs are secured at one of their ends to the base such as to reduce sounds and vibrations during the operation of the pump. Several embodiments are described in which the pumping member is a diaphragm, a pair of diaphragms, and a piston, respectively.
REFERENCES:
patent: 2169827 (1939-08-01), Whitted
patent: 2605042 (1952-07-01), Reutter
patent: 4154559 (1979-05-01), Enomoto
patent: 4169234 (1979-09-01), Yonkers
patent: 4859152 (1989-08-01), Kimura et al.
patent: 5201641 (1993-04-01), Richer
patent: 6514047 (2003-02-01), Burr et al.
patent: 6533560 (2003-03-01), Ohya et al.
patent: 6652252 (2003-11-01), Zabar
patent: 2004/0234377 (2004-11-01), Bolt
Kramer Devon C
Lettman Bryan
N.A.H. Zabar Ltd.
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