Diaphragm pump having variable displacement

Details Diaphragm pump having variable displacement Diaphragm pump having variable displacement

1994-04-04

1995-08-01

Ryznic, John E.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

Flexible wall-type working member

92 138, 4174131, F01B 1900, F01B 3114, F04B 1700

Patent

active

054372186

ABSTRACT:
Diasphragm pump having a delivery rate which can be continuously adjusted between a zero value and a maximum value, comprising:
a continuously rotating eccentric drive member (6);
a connecting rod (5) with a connecting-rod big end (11-14) fitted with a bearing (10) receiving, so as to rotate freely, the member (6) and the other end of which is coupled to a central area of the diaphragm (2);
releasable coupling means in order to couple, in a selective manner, the connecting-rod big end to the member (6) during a desired fraction of stroke, which can be continuously adjusted by adjustment means (16-19).
The connecting-rod big end is fitted with at least one slide (11) extending substantially in the prolongation of the connecting rod (5) on the opposite side from the diaphragm (2) and capable of supporting the bearing (10) so as to slide freely in relation to the connecting-rod big end, and elastic return means (15) are provided in order to hold the bearing (10) at the bottom of the slide in the absence of counterforce exerted by the eccentric member on the bearing, the elastic return means acting on the bearing on the opposite side from the connecting rod.

REFERENCES:
patent: 2503907 (1950-04-01), Hefler
patent: 2895424 (1959-07-01), Tramontini et al.
patent: 3661167 (1972-05-01), Hussey
patent: 3801232 (1974-04-01), Kilayko
patent: 4086036 (1978-04-01), Hagen et al.
patent: 4167896 (1979-09-01), Clements
patent: 4323333 (1982-04-01), Apter et al.
patent: 4856966 (1989-08-01), Ozawa
patent: 4993925 (1991-02-01), Becker et al.
patent: 5074763 (1991-12-01), Degremont

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