Pressure sensor comprising a capacitive cell and support device comprising said sensor
First Claim
1. A sensor for detecting and measuring a load pressure applied to a support device, the sensor comprising at least one capacitive cell including a flat condenser comprising at least one layer of a compressible dielectric insulating material interposed between two layers of conductive material, wherein said layer of compressible dielectric material has a thickness of between 0.3 to 1 mm.
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Accused Products
Abstract
A sensor for detecting and measuring a load pressure applied to a support device comprises at least one capacitive cell including a flat condenser comprising at least one layer of a compressible insulating dielectric material interposed between two layers of conductive material. A support device capable of supporting the body of a person comprises at least one top layer composed of a plurality of air-filled inflatable cells communicating with inflation elements, characterized in that it comprises a sensor, of which said condenser is disposed under said top layer and connected to an electronic control and regulation device capable of controlling inflation or deflation elements.
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Citations
15 Claims
- 1. A sensor for detecting and measuring a load pressure applied to a support device, the sensor comprising at least one capacitive cell including a flat condenser comprising at least one layer of a compressible dielectric insulating material interposed between two layers of conductive material, wherein said layer of compressible dielectric material has a thickness of between 0.3 to 1 mm.
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8. A sensor for detecting and measuring a load pressure applied to a support device, the sensor comprising at least one capacitive cell including a flat condenser comprising at least one layer of a compressible dielectric insulating material interposed between two layers of conductive material, wherein the at least one layer of compressible dielectric insulating material and the two layers of conductive material are applied directly against each other without interposed connecting layers, wherein the at least one layer of compressible dielectric insulating material and the two layers of conductive material are solidly connected to each other by tack welds that are capable of keeping the at least one layer of compressible dielectric insulating material and the two layers of conductive material in a superimposed position relative to each other.
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9. A support device capable of supporting the body of a person, the support device comprising
at least one top layer having a plurality of air-filled inflatable cells communicating with inflation elements, and a sensor for detecting and measuring a load pressure applied to at least some of the air-filled inflatable cells of the plurality of air-filled inflatable cells, the sensor comprising at least one capacitive cell including a flat condenser comprising at least one layer of a compressible dielectric insulating material interposed between two layers of conductive material, wherein said layer of compressible dielectric material has a thickness of between 0.3 to 1 mm, said condenser being disposed under said at least one top layer and connected to an electronic control and regulation device designed to control the inflation or deflation elements for filling or emptying, respectively, said plurality of air-filled inflatable cells of said top layer in such a way that the internal inflation pressure of the air inside the cells is equal to an ideal set point pressure predetermined relative to the load pressure of the body of a person resting on said top layer, measured by said sensor.
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15. A support device capable of supporting the body of a person, the support device comprising
at least one top layer having a plurality of air-filled inflatable cells communicating with inflation elements, and a sensor for detecting and measuring a load pressure applied to at least some of the air-filled inflatable cells of the plurality of air-filled inflatable cells, the sensor comprising at least one capacitive cell including a flat condenser comprising at least one layer of a compressible dielectric insulating material interposed between two layers of conductive material, said condenser being disposed under said at least one top layer and connected to an electronic control and regulation device designed to control the inflation or deflation elements for filling or emptying, respectively, said plurality of air-filled inflatable cells of said top layer in such a way that the internal inflation pressure of the air inside the cells is equal to an ideal set point pressure predetermined relative to the load pressure of the body of a person resting on said top layer, measured by said sensor, wherein the at least one layer of compressible dielectric insulating material and the two layers of conductive material are applied directly against each other without interposed connecting layers, wherein the at least one layer of compressible dielectric insulating material and the two layers of conductive material are solidly connected to each other by tack welds that are capable of keeping the at least one layer of compressible dielectric insulating material and the two layers of conductive material in a superimposed position relative to each other.
Specification