Pump chamber and valve for a pump chamber
First Claim
1. Pump chamber for a pump for the administration of active compositions, said pump chamber comprising:
- walls delimiting said pump chamber, wherein said walls define an inlet and an outlet,a part of said walls of said pump chamber being formed by a flexible membrane, said membrane being actuatable by a reciprocally movable actuating means that varies the volume of the pump chamber in accordance with the movements of said actuating means, said membrane having a convex domed shape projecting outwardly from said pump chamber and being made of a resiliently flexible material, the apex of the membrane being acted upon by said actuating means, said actuating means having a stroke which is adjustable to the amount of dose to be administered; and
a tensioned, planar membrane positioned over said inlet and allowing air to pass in and out of the pump chamber, but blocking a liquid flow through the inlet from the pump chamber.
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a pump chamber (1) for a pump intended primarily for infusion systems for medical use, said pump chamber comprising walls (21, 28) delimiting said chamber and an inlet (22) and an outlet (23), a part of said walls of said pump chamber being formed by a flexible membrane (40, 90), said membrane being actuatable by a reciprocally movable actuating means (80), thus varying the volume of the pump chamber in accordance with the movements of said actuating means. The membrane (40, 90) has a convex domed shape projecting outwardly from said pump chamber (1) and is made of a resiliently flexible material, the apex of the domed membrane being acted upon by said actuating means, said actuating means having a stroke which may be adjusted to the amount of the dose to be administered. The invention also relates to a valve for a pump chamber.
42 Citations
12 Claims
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1. Pump chamber for a pump for the administration of active compositions, said pump chamber comprising:
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walls delimiting said pump chamber, wherein said walls define an inlet and an outlet, a part of said walls of said pump chamber being formed by a flexible membrane, said membrane being actuatable by a reciprocally movable actuating means that varies the volume of the pump chamber in accordance with the movements of said actuating means, said membrane having a convex domed shape projecting outwardly from said pump chamber and being made of a resiliently flexible material, the apex of the membrane being acted upon by said actuating means, said actuating means having a stroke which is adjustable to the amount of dose to be administered; and a tensioned, planar membrane positioned over said inlet and allowing air to pass in and out of the pump chamber, but blocking a liquid flow through the inlet from the pump chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A check valve for an inlet of a pump chamber, comprising:
a planar, resilient membrane tensioned over a recess surrounding a conduit spaced apart from said planar membrane, said conduit located in said recess, said planar membrane having an opening located within the area of the recess that is offset in relation to said conduit. - View Dependent Claims (12)
Specification