Diaphragm and chamber device
First Claim
1. A diaphragm and chamber device comprisingchamber means for defining a chamber having fixed position walls on opposite sides,a diaphragm in said chamber and sealably mounted between said walls to define first and second regions therein on opposite sides of said diaphragm, said diaphragm being movable in said chamber so as to change the volume of said two regions as said diaphragm moves toward either said wall,a magnet carried solely by a center portion of said diaphragm and movable therewith, back and forth between said walls completely within said chamber, anda magnet position sensor carried by a said wall outside of said chamber and sensing the location of said magnet and thus said diaphragm.
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Accused Products
Abstract
A diaphragm and chamber device including chamber means for defining a chamber having fixed position walls on opposite sides, a diaphragm in the chamber and sealably mounted between the walls to define first and second regions therein on opposite sides of the diaphragm, the diaphragm being movable in the chamber so as to change the volume of the two regions as the diaphragm moves toward either the wall, a magnet carried by the diaphragm and movable therewith, and a magnet position sensor carried by a the wall and sensing the location of the magnet and thus the diaphragm.
17 Citations
11 Claims
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1. A diaphragm and chamber device comprising
chamber means for defining a chamber having fixed position walls on opposite sides, a diaphragm in said chamber and sealably mounted between said walls to define first and second regions therein on opposite sides of said diaphragm, said diaphragm being movable in said chamber so as to change the volume of said two regions as said diaphragm moves toward either said wall, a magnet carried solely by a center portion of said diaphragm and movable therewith, back and forth between said walls completely within said chamber, and a magnet position sensor carried by a said wall outside of said chamber and sensing the location of said magnet and thus said diaphragm.
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9. A dialysate supply machine comprising
a first fluid flow chamber with a first inlet for connection to source of fresh dialysate, a first outlet for connection to a dialyzer, a second inlet for connection to said dialyzer, a second outlet for connection to a drain, valves controlling flow into and out of said inlets and outlets, a generally flat flexible sheet within said chamber and dividing said chamber into a fresh dialysate region communicating with said first inlet and outlet and a spent dialysate region communicating with said second inlet and outlet, said generally flat flexible sheet having a periphery sealed to said chamber and a central portion that is reciprocally movable along an axis perpendicular to a plane through said periphery, a magnet secured solely to the center of said sheet, said magnet having a front and a rear spaced from each other along said axis, said magnet being movable back and forth between said walls completely within said chamber, and a magnet position sensor outside of said chamber and controlling said valves in response to the position of said magnet.
Specification