# US 9,752,948 B2 · Tunable pressure transducer assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,948 B2 - Document ID: US9752948B2 - Status: Granted - Kind: B2 - Application number: 15/252,523 - Filed: 2016-08-31 - Published: 2016-12-22 - Granted: 2017-09-05 - Earliest claimed: 2010-09-10 - Assignees: Kulite Semiconductor Products, Inc. - Applicants: Kulite Semiconductor Products, Inc. - Inventors: Louis DeRosa; Robert Gardner - Web page: https://patentgrep.com/patent/US9752948B2 ## CPC - G01L 19/0609: {Pressure pulsation damping arrangements} - G01L 19/0007: {Fluidic connecting means} - Y10T 29/49764: with testing or indicating - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A tunable pressure transducer assembly that comprises a sensing element disposed within a housing, wherein the sensing element is adapted to output a signal substantially indicative of an applied pressure, and a filter assembly also disposed within the housing. In one example embodiment, a method includes receiving, at a filter assembly having a tube, a cap and a cavity defined by a housing, a pressure, wherein the cap is positioned to set a predetermined volume of the cavity and the tube is associated with an application of the pressure to the cavity, wherein the pressure includes a static pressure component and a dynamic pressure component; filtering, by the tube and the cavity, at least a portion of the dynamic pressure component of the pressure to obtain a filtered pressure; outputting, from the filter assembly, the filtered pressure; and wherein the filtered pressure is used to determine the static pressure component of the pressure. ## Claims ### Claim 1 A filter assembly comprising: a housing defining a channel and an internal cavity, wherein the channel is in communication with the internal cavity; a slidable cap disposed within at least a portion of the internal cavity of the housing; a slidable tube disposed within at least a portion of the channel and attached to the cap, wherein the tube and the cap are slideably disposed within the housing; wherein the slidable tube and the slidable cap form an adjustable low pass mechanical filter configured to receive and filter an input pressure to provide a filtered pressure. ### Claim 2 (depends on 1) The filter assembly of claim 1, wherein a position of the slidable tube and the slidable cap of the adjustable low pass mechanical filter is configured to control a dampening property of the filter assembly. ### Claim 3 (depends on 2) The filter assembly of claim 2, wherein the dampening property comprises attenuation of one or more frequencies. ### Claim 4 (depends on 1) The filter assembly of claim 1, wherein the slidable tube is detachably attached to the slidable cap. ### Claim 5 (depends on 1) The filter assembly of claim 1, further comprising: a sensing element disposed in the housing and operationally coupled to the internal cavity, wherein the sensing element is configured to: receive the filtered pressure; measure the filtered pressure to obtain a filtered pressure signal; and output the filtered pressure signal. ### Claim 6 (depends on 5) The filter assembly of claim 5, wherein the filtered pressure signal corresponds to a static pressure component of the input pressure. ### Claim 7 (depends on 5) The filter assembly of claim 5, wherein the sensing element comprises a piezoresistive sensing element. ### Claim 8 (depends on 1) The filter assembly of claim 1, wherein the slidable cap comprises a first inner width and the slidable tube comprises a second inner width, wherein the first inner width is greater than the second inner width. ### Claim 9 (depends on 1) The filter assembly of claim 1, wherein a length of the slidable tube is configured to manipulate a filter property of the filter assembly. ### Claim 10 (depends on 1) The filter assembly of claim 1, wherein a volume of the internal cavity is configured by a position of the slidable cap to control a dampening property of the filter assembly. ### Claim 11 A method, comprising: receiving, at a first end of a filter assembly, an input pressure, wherein the filter assembly comprises: a housing defining a channel and an internal cavity, wherein the channel is in communication with the internal cavity; a slidable cap disposed within at least a portion of the internal cavity of the housing; a slidable tube disposed within at least a portion of the channel and attached to the cap, wherein the tube and the cap are slideably disposed within the housing; filtering, by the filter assembly, at least a portion of the input pressure to obtain a filtered pressure; and outputting, from the filter assembly, the filtered pressure. ### Claim 12 (depends on 11) The method of claim 11, further comprising positioning the slidable tube and the slidable cap of the of the filter assembly to control a dampening property of the filter assembly. ### Claim 13 (depends on 12) The method of claim 12, wherein the dampening property comprises dampening one or more frequencies associated with the input pressure. ### Claim 14 (depends on 11) The method of claim 11, further comprising: receiving, with a sensing element disposed in the housing and operationally coupled to the internal cavity, the filtered pressure; measuring, with the sensing element, the filtered pressure to obtain a filtered pressure signal; and outputting the filtered pressure signal. ### Claim 15 (depends on 11) The method of claim 11, wherein the sensing element comprises a piezoresistive sensing element. ### Claim 16 (depends on 14) The method of claim 14, wherein the filtered pressure signal corresponds to a static pressure component of the input pressure. ### Claim 17 (depends on 11) The method of claim 11, further comprising: configuring a first inner width of the slidable cap; and configuring a second inner width of the slidable tube, wherein the first inner width is greater than the second inner width. ### Claim 18 (depends on 11) The method of claim 11, further comprising: manipulating a filter property of the filter assembly by configuring a length of the slidable tube. ### Claim 19 (depends on 11) The method of claim 11, further comprising: positioning the slidable cap within the internal cavity to configure a volume of the internal cavity, wherein the volume controls a dampening property of the filter assembly. ### Claim 20 (depends on 19) The method of claim 19, wherein the positioning is determined, at least in part, by a viscosity associated with a pressure media in communication with the filter assembly.