# US 2014/0196727 A1 · Corded Hearing Protective Device And Method Of Manufacturing The Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196727 A1 - Document ID: US20140196727A1 - Status: Published application - Kind: A1 - Application number: 14/215,121 - Filed: 2014-03-17 - Published: 2014-07-17 - Earliest claimed: 2002-10-28 - Assignees: 3M Innovative Properties Company - Applicants: 3M Innovative Properties Company - Inventors: Robert Franciszek Barwacz - Web page: https://patentgrep.com/patent/US20140196727A1 ## CPC - A61F 11/12: External mounting means - A61F 11/08: internal, e.g. earplugs - Y10T 29/4957: Sound device making - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A hearing protective device is provided including a first sound attenuating element, a second sound attenuating element, a flexible elongated member connecting the first sound attenuating element and the second sound attenuating element, and a knot formed in the flexible elongated member, the knot is untied by moving the first sound attenuating element in a direction away from second sound attenuating element. ## Claims ### Claim 1 A hearing protective device, comprising: a first sound attenuating element; a second sound attenuating element; a flexible elongated member connecting the first sound attenuating element and the second sound attenuating element, the flexible elongated member being in the form of a bundle such that a portion of the flexible elongated member forms more than two circular windings, and a knot formed in the flexible elongated member, the knot being a slip knot that maintains the flexible elongated member in the bundle, wherein the knot is untied and the bundle unraveled by moving the first and second sound attenuating elements in a direction away from each other. ### Claim 2 (depends on 1) The hearing protective device of claim 1, wherein no additional parts are needed to maintain the flexible elongated member in the bundle. ### Claim 3 (depends on 1) The hearing protective device of claim 1, wherein the first and second sound attenuating elements comprise earplugs. ### Claim 4 (depends on 3) The hearing protective device of claim 3, wherein each earplug comprises a resilient foam body including first and second opposite ends, the first end for being inserted into an ear canal of a user and the second end being attached to the flexible elongated member. ### Claim 5 (depends on 3) The hearing protective device of claim 3, wherein each earplug comprises a foam element fixed to a stem, the stem extending from the foam element, the cord being attached to the stem. ### Claim 6 (depends on 3) The hearing protective device of claim 3, wherein each earplug comprises a pre-molded body of a resilient polymeric material. ### Claim 7 (depends on 6) The hearing protective device of claim 6, wherein the body comprises a stem portion and a plurality of radially extending flange elements disposed on the stem portion. ### Claim 8 (depends on 7) The hearing protective device of claim 7, wherein the flange elements include substantially circular cross-sections and extend from the stem portion in a direction toward a rear of said stem portion to form an annular space between the flanges and the stem portion. ### Claim 9 (depends on 1) The hearing protective device of claim 1, wherein the flexible elongated member comprises a cord of a plastic material. ### Claim 10 (depends on 1) The hearing protective device of claim 1, wherein the knot is a slip knot. ### Claim 11 (depends on 1) The hearing protective device of claim 1, wherein the elongated member includes opposite first and second ends, the knot comprising a circularly wound mid-portion having more than two circular windings, the first and second ends of the elongated member forming a loop on one side of the circularly wound mid-portion and passing through a center of the circularly wound mid-portion to extend freely therefrom. ### Claim 12 A method of manufacturing a hearing protective device, comprising: providing a first sound attenuating element; providing a second sound attenuating element; providing a flexible elongated member; attaching the first and second sound attenuating elements to opposing ends of the flexible elongated member; winding the flexible elongated member into a bundle; and tying a slip knot in the flexible elongated member so as to maintain the flexible elongated member in the wound bundle, such that a portion of the flexible elongated member forms more than two circular windings, and the first and second-sound attenuating elements extend from the bundle and so as to allow for untying of the knot and unraveling of the bundle by moving the first sound attenuating element in a direction away from the second sound attenuating element. ### Claim 13 (depends on 12) The method of claim 12, further comprising disposing the bundle with attached first and second attenuating elements in a package and sealing the package. ### Claim 14 (depends on 12) The method of claim 12, wherein the first and second sound attenuating elements comprise resilient foam earplugs formed by a molding process and the flexible elongated member comprises a cord of a plastic material. ### Claim 15 (depends on 12) The method of claim 12, wherein said tying the knot comprises forming a slip knot in the flexible elongated member. ### Claim 16 (depends on 12) The method of claim 12, wherein said attaching the first and second opposite ends comprises sonically welding the first and second attenuating elements to the first and second opposite ends, respectively. ### Claim 17 (depends on 12) The method of claim 12, wherein said attaching the first and second opposite ends comprises adhesively bonding the first and second attenuating elements to the first and second opposite ends, respectively.