Specifications

The Patent Office Journal 17/12/2010
4521
(12) PATENT APPLICATION PUBLICATION (21) Application No.1371/CHE/2009 A
(19) INDIA
(22) Date of filing of Application :11/06/2009 (43) Publication Date : 17/12/2010
(54) Title of the invention : ˜E-FIELD BASED PRESSURE SENSOR FOR BIOMEDICAL PRESSURE SENSING SYSTEMS™
(51) International classification :H03H3/00
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
Filing Date
:NA
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(71)Name of Applicant :
1)Cochin University of Science and Technology
Address of Applicant :Cochin 682 022 Kerala India
(72)Name of Inventor :
1)Dr. Jacob Philip
2)Tharakan Jacob Ginson
(57) Abstract :
The present invention provides a pressure sensor 20 comprising a printed circuit board (PCB) 30, an interdigital capacitive electrode
10 comprising a plurality of long parallel electrodes that have interpenetrating formation etched on to the said printed circuit board
(PCB) 30, wherein the said interdigital capacitive electrode 10 forms an interdigital capacitor, whose capacitance varies with the
variation in the dielectric constant of the medium between the electrodes, and a buffer disc 40 placed and fixed above the electrodes of
the said interdigital capacitive electrode 10, wherein the application of the external pressure 50 over the said buffer disc 40 causes the
disc 40 to compress and get inserted into the spacing 60 between the electrodes.
No. of Pages : 16 No. of Claims : 13