Expansible chamber devices – Collapsible chamber wall portion – Wall portion formed of flexible material
Patent
1995-11-27
1997-06-17
Lopez, F. Daniel
Expansible chamber devices
Collapsible chamber wall portion
Wall portion formed of flexible material
92 90, 92 93, F16J 302
Patent
active
056387377
ABSTRACT:
The present invention relates to a piston assembly for use in a fluid delivery system. The piston assembly is comprised of two elements: a splined-piston having generally a convex shape and a ribbed-base, that receives the piston, which has a complementary concave shape. The interposition of the splines and ribs and the complementary shaping of the two elements permit: a constant supporting surface area to be realized throughout a pumping cycle; the establishment of a constant supporting surface that readily and fully supports a thin, flexible material such that the material cannot not likely become stretched, unsupported or bound within the pumping mechanism throughout the pumping cycle; and the establishment of a relationship between the piston and its associated pumping chamber that enables a precise volumetric quantity to be delivered consistently and accurately.
REFERENCES:
patent: 1637219 (1927-07-01), Edelmann
patent: 3204568 (1965-09-01), Grossfield
patent: 4270441 (1981-06-01), Tuck, Jr.
patent: 4375182 (1983-03-01), Zavoda
patent: 4391600 (1983-07-01), Archibald
patent: 4657490 (1987-04-01), Abbott
patent: 5054373 (1991-10-01), Brault et al.
patent: 5060539 (1991-10-01), Cissell et al.
patent: 5115724 (1992-05-01), Zavoda
patent: 5335584 (1994-08-01), Bair
patent: 5349896 (1994-09-01), Delanay, III et al.
Abbott Martyn
Kulle Lee K.
Mattson Andrew P.
Lopez F. Daniel
Quest Medical Inc.
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