Dual chamber pumping apparatus
First Claim
1. A dual chamber pumping apparatus for use in infusing fluids to a patient, comprising:
- a disk having a fluid inlet and a fluid outlet;
a first resilient membrane attached to said disk to establish a first pumping chamber, and a second resilient membrane attached to said disk to establish a second pumping chamber;
a first one-way valve for connecting said fluid inlet in fluid communication with said first pumping chamber, and a second one-way valve for connecting said fluid inlet in fluid communication with said second pumping chamber; and
a one-way outlet valve for connecting said fluid outlet in alternating fluid communication with said first and second pumping chambers.
7 Assignments
0 Petitions
Accused Products
Abstract
A dual chamber pumping apparatus and method for infusing fluids to a patient includes a disk having a fluid inlet and a fluid outlet. Resilient membranes are attached to opposite sides of the disk to establish dual pumping chambers, and a network of one-way valves connects the fluid inlet in alternating fluid communidation with the pumping chambers. A one-way outlet valve connects the pumping chambers alternately in fluid communication with the fluid outlet. The one-way valves utilize a hollow, elastomeric tube fixedly disposed in passageways within the disk for covering and uncovering respective ports in response to fluid pressure differentials on the inner and outer surfaces of the walls of the hollow, elastomeric tube.
109 Citations
11 Claims
-
1. A dual chamber pumping apparatus for use in infusing fluids to a patient, comprising:
-
a disk having a fluid inlet and a fluid outlet; a first resilient membrane attached to said disk to establish a first pumping chamber, and a second resilient membrane attached to said disk to establish a second pumping chamber; a first one-way valve for connecting said fluid inlet in fluid communication with said first pumping chamber, and a second one-way valve for connecting said fluid inlet in fluid communication with said second pumping chamber; and a one-way outlet valve for connecting said fluid outlet in alternating fluid communication with said first and second pumping chambers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A dual chamber pumping apparatus for use in infusing fluids to a patient comprising:
-
a disk having a fluid inlet and a fluid outlet; and a first resilient membrane attached to a first side of said disk for establishing a first pumping chamber, and a second resilient membrane attached to a second side of said disk for establishing a second pumping chamber; said disk having inlet valve means for connecting said fluid inlet in fluid communication with said first pumping chamber and said second pumping chamber, said valve means including a first one-way valve movable between an open position for allowing fluid to flow from said fluid inlet into said first pumping chamber and a closed position for preventing fluid from flowing from said first pumping chamber back into said fluid inlet, said valve means further including a second one-way valve movable between an open position for allowing fluid to flow from said fluid inlet into said second pumping chamber and a closed position for preventing fluid from flowing from said first pumping chamber back into said fluid inlet; said disk further having outlet valve means connecting said first and second pumping chambers in fluid communication with said fluid outlet, said outlet valve means including a one-way outlet valve for preventing fluid flow from said fluid outlet back into said first and second pumping chambers, and being movable between a first position for allowing fluid to flow from said first pumping chamber into said fluid outlet while preventing fluid from flowing from said second pumping chamber into said fluid outlet, and a second position for allowing fluid to flow from said second pumping chamber into said fluid outlet while preventing fluid from flowing from said first pumping chamber into said fluid outlet. - View Dependent Claims (10)
-
-
11. A method of pumping fluid to a patient comprising:
-
providing a disk having a fluid inlet and a fluid outlet; attaching a first resilient membrane to said disk to establish a first pumping chamber, and a second resilient membrane to an opposite side of said disk to establish a second pumping chamber; providing a first one-way valve for connecting said fluid inlet in fluid communication with said first pumping chamber, and providing a second one-way valve for connecting said fluid inlet in fluid communication with said second pumping chamber; providing a one-way outlet valve for connecting said fluid outlet in alternating fluid communication with said first and second pumping chambers; deforming said first resilient membrane to close said first one-way valve and simultaneously open said one-way outlet valve for allowing fluid to flow from said first pumping chamber out said fluid outlet while allowing said second chamber to be filled with fluid from said fluid inlet; and subsequently deforming said second resilient membrane to close said second one-way valve and simultaneously open said one-way outlet valve for allowing fluid to flow from said second pumping chamber out said fluid outlet while allowing said first chamber to be filled with fluid from said fluid inlet.
-
Specification