# US 7,743,876 B2 · Stethoscope shield system and method of shielding stethoscope using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,743,876 B2 - Document ID: US7743876B2 - Status: Granted - Kind: B2 - Application number: 11/952,356 - Filed: 2007-12-07 - Published: 2008-09-25 - Granted: 2010-06-29 - Earliest claimed: 2006-12-07 - Assignees: Richard C. Weidman - Inventors: Richard C. Weidman - Web page: https://patentgrep.com/patent/US7743876B2 ## CPC - A61B 7/02: Stethoscopes - Y10T 428/1481: Dissimilar adhesives - Y10T 428/1486: Ornamental, decorative, pattern, or indicia - Y10T 428/149: Sectional layer removable - Y10T 428/1495: Adhesive is on removable layer - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A stethoscope shield system and method of preventing contamination of an instrument, particularly a stethoscope, includes a plurality of substantially planar shields stacked one upon the other, each of the shields having a substantially identical outer periphery and including a first surface and a second surface such that adjacent shields are attracted to one another with the first surface of each of these shields in contact with the second surface of an adjacent shield with a first shield of the plurality of shields being in contact with the diaphragm of the stethoscope for supporting the stacked shields, wherein the attraction force between the stacked shields occurs over less than an entire surface of at least one of the first and second surfaces and the attraction between the stacked shields has at least one of a consecutively increasing attraction area and a consecutively increasing attraction strength, and an exposed shield of the stacked shields is removed after contacting the body of a patient. ## Claims ### Claim 1 A shield system for an instrument having a surface area for touching a body of a person, the system comprising: a plurality of substantially planar shields, each having a substantially identical outer periphery, stacked one upon the other with an adhesive disposed therebetween, each of said shields further including a first surface and a second surface with said first surface of each of said shields adhering to said second surface of an adjacent shield by said adhesive; and a first shield of said stacked shields being adhered to said surface area of said instrument for supporting said stacked shields; wherein said adhesive disposed between said stacked shields covers less than an entire surface of at least one of said first and second surfaces and has at least one of a consecutively increasing bonding area and a consecutively increasing bonding strength between each successive shield of said stacked shields, and an exposed shield of said stacked shields is removed after contacting the body. ### Claim 2 (depends on 1) The system as defined in claim 1, wherein the instrument is a stethoscope and the surface is a diaphragm of the stethoscope. ### Claim 3 (depends on 1) The system as defined in claim 1, wherein each of said shields includes at least one of a tab extending from a periphery of said shield and an indicator mark at a periphery of said shield. ### Claim 4 (depends on 3) The system as defined in claim 3, wherein said adhesive is applied to a selective region of said first surface of said shields at a position opposite to one of said tab and said indicator mark. ### Claim 5 (depends on 4) The system as defined in claim 4, wherein said adhesive is applied adjacent a periphery of said first surface of said stacked shields. ### Claim 6 (depends on 5) The system as defined in claim 5, wherein a central region of said first surface of said stacked shields includes said adhesive. ### Claim 7 (depends on 1) The system as defined in claim 1, wherein a thickness of each of said shields is in a range of about 0.10 to about 4.0 mils. ### Claim 8 (depends on 1) The system as defined in claim 1, wherein each of said shields is formed of a material which is not readily permeable by at least one of liquids and microbes. ### Claim 9 A method for preventing contamination of an instrument surface of an instrument comprising the steps of: applying a plurality of substantially planar shields, each having a substantially identical outer periphery, stacked one upon the other with an adhesive disposed therebetween to a surface of said instrument, each of said shields further including a first surface and a second surface such that adjacent shields adhere to one another with said first surface of each of said shields adhering to said second surface of an adjacent shield and said first surface of a first shield in said stacked shields adjacent to said instrument surface is adhered to said instrument surface by said adhesive; and removing an outermost shield of said stacked shields after said instrument has been used, wherein said adhesive disposed between said stacked shields covers less than an entire surface of at least one of said first and second surfaces and has at least one of a consecutively increasing bonding area and a consecutively increasing bonding strength between each successive shield of said stacked shields. ### Claim 10 (depends on 9) The method as defined in claim 9, wherein said instrument is a stethoscope and said surface is a diaphragm of said stethoscope. ### Claim 11 (depends on 10) The method as defined in claim 10, wherein each of said shields includes at least one of a tab extending from a periphery of said shield and an indicator mark at a periphery of said shield. ### Claim 12 (depends on 10) The method as defined in claim 10, wherein said first shield includes a fenestrated structure. ### Claim 13 (depends on 10) The method as defined in claim 10, wherein said adhesive is applied to said first surface of each of said stacked shields. ### Claim 14 (depends on 13) The method as defined in claim 13, further comprising a step of removing a release liner from said stacked shields to adhered said stacked shields to said surface of said diaphragm prior to applying said stacked shields to said surface of said diaphragm. ### Claim 15 (depends on 13) The method as defined in claim 13, wherein said adhesive is applied to selective regions of said first surface. ### Claim 16 (depends on 15) The method as defined in claim 15, wherein said adhesive is applied adjacent a periphery of said first surface. ### Claim 17 (depends on 16) The method as defined in claim 16, wherein a central region of said first surface includes said adhesive. ### Claim 18 (depends on 9) The method as defined in claim 9, wherein a thickness of each of said shields is in a range of 0.10 to 4.0 mils. ### Claim 19 (depends on 9) The method as defined in claim 9, wherein each of said shields is formed of a material which is not readily permeable by at least one of liquid and microbes. ### Claim 20 (depends on 9) The method as defined in claim 9, wherein the step of removing an outermost shield of said stacked shields includes a pinching movement of said outermost shield to buckle said outermost shield. ### Claim 21 (depends on 20) The method as defined in claim 20, wherein said pinching movement is aligned along a direction opposite to at least one of a tab extending from a periphery of said shield and an indicator mark at a periphery of said shield. ### Claim 22 A shield system for application to a contact surface of an instrument comprising: a plurality of substantially planar shields, each having a substantially identical outer periphery, stacked one upon the other, each of said shields including a first surface and a second surface such that adjacent shields are attracted to one another with said first surface of each of said shields contacting said second surface of an adjacent shield; and a first shield of said stacked shields being in contact with the instrument for supporting said stacked shields, wherein said attraction between said stacked shields occurs over less than an entire surface of at least one of said first and second surfaces and has at least one of a consecutively increasing attraction area and a consecutively increasing attraction strength between each successive shield of said stacked shields, and an exposed shield of said stacked shields is removed after contacting a body. ### Claim 23 (depends on 22) The shield system as defined in claim 22, wherein said attraction occurs at selected regions of said first surface of said stacked shields. ### Claim 24 (depends on 23) The shield system as defined in claim 23, wherein said attraction occurs adjacent a periphery of said first surface of said stacked shields. ### Claim 25 (depends on 23) The shield system as defined in claim 23, wherein said attraction occurs at a central region of said first surface of said stacked shields includes said adhesive. ### Claim 26 (depends on 22) The shield system as defined in claim 22, wherein a thickness of each of said shields is in a range of 0.10 to 4.0 mils. ### Claim 27 (depends on 22) The shield system as defined in claim 22, wherein each of said shields is formed of a material which is not readily permeable by at least one of liquid and microbes. ### Claim 28 (depends on 23) The shield system as defined in claim 23, wherein each of said shields includes at least one of a tab extending from a periphery of said shield and an indicator mark at a periphery of said shield, and said selected region of said first surface of said stacked shields is at a position opposite one of said tab and said indicator mark. ### Claim 29 (depends on 22) The shield system of claim 22, wherein said planar shields are attracted to one another by at least one of thermal bonding, pressure bonding and ultrasonic welding. ### Claim 30 A stethoscope shield system for a stethoscope having a diaphragm with a surface area for touching a body of a person, the system comprising: a plurality of substantially planar shields, each having a substantially identical outer periphery, stacked one upon the other, each of said shields including a first surface and a second surface with said first surface of each of said shields being attracted to said second surface of said adjacent shield by an attraction force; and a first shield of said plurality of shields being in contact with said diaphragm for supporting said stacked shields, wherein said attraction force between said stacked shields occurs over less than an entire surface of at least one of said first and second surfaces and has at least one of a consecutively increasing attraction force area and a consecutively increasing attraction force strength between each successive shield of said stacked shields, and an exposed shield of said stacked shields is removed after contacting said body. ### Claim 31 (depends on 30) The shield system of claim 30, wherein said planar shields are attracted to one another by at least one of thermal bonding, pressure bonding and ultrasonic welding. ### Claim 32 (depends on 30) The system as defined in claim 30, further comprising a release liner devoid of said adhesive positioned adjacent said first shield, said release liner being removed prior to adhering said first shield to said diaphragm. ### Claim 33 (depends on 32) The system as defined in claim 32, wherein said first shield includes a fenestrated structure.