# US 10,369,347 B2 · Screw connector for medical hose systems and a medical hose system having a screw connector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,369,347 B2 - Document ID: US10369347B2 - Status: Granted - Kind: B2 - Application number: 15/108,325 - Filed: 2015-02-24 - Published: 2016-11-10 - Granted: 2019-08-06 - Earliest claimed: 2014-02-27 - Assignees: Fresenius Medical Care Deutschland GmbH - Applicants: Fresenius Medical Care Deutschland GmbH - Inventors: Martin Lauer - Web page: https://patentgrep.com/patent/US10369347B2 ## CPC - A61M 39/1011: {Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence)} - A61M 39/16: having provision for disinfection or sterilisation {(A61M39/143 takes precedence)} - A61M 1/3622: {with a cassette forming partially or totally the blood circuit} - A61M 1/3661: {for haemodialysis} - A61M 39/1033: {Swivel nut connectors, e.g. threaded connectors or bayonet-connectors} - A61M 2039/1044: {Verifying the connection, e.g. audible feedback, tactile feedback, visual feedback, using external light sources} - F16B 39/30: Locking exclusively by special shape of the screw-thread - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) ## Abstract A screw connector includes a first connector with a first lumen and an outside thread, and a second connector with an elastically deformable nut and an inside thread. The outside thread has a first formation and the nut has a second formation, the second formation is a recess in the base of the nut, and the inside thread and the outside thread are configured for mutual connection. The nut is configured for deformation by the first formation in a first angle-of-rotation range without the first formation engaging in the recess, and the inside thread, the outside thread, the first formation, and the recess are configured for engaging the first formation when the inside and outside threads are connected in a second angle-of-rotation range. The screw connector has a half-open sterilization position in the second angle-of-rotation range. In another range, the screw connector may be tightened to be gas-tight and/or liquid-tight. ## Claims ### Claim 1 A screw connector for a medical hose system, comprising a first connecting element with a first lumen and an outside thread and a second connecting element with an elastically deformable nut with an inside thread, the inside thread and the outside thread being configured to be screwed to one another, with the outside thread having a first formation and the nut having a second formation, with the second formation being a recess in a base of the thread of the nut, and the inside thread and the outside thread being configured for mutual screw connection, and the nut being configured for elastic deformation by the first formation in a predetermined first angle-of-rotation range without the first formation engaging in the recess in the base of the thread of the nut, and the inside thread and the outside thread and the first formation and the recess in the base of the thread of the nut being configured for engaging the first formation in the recess in the base of the thread of the nut when the inside thread and the outside thread are screwed together in a predetermined second angle-of-rotation range, with the first connecting element and the second connecting element each being configured to be gas-permeable when the inside thread is screwed to the outside thread in the second angle-of-rotation range between an external environment of the screw connector and an interior of the screw connector formed at least by the first lumen, and the first connecting element and the second connecting element each being configured to form a gas-tight and/or a liquid-tight seal between the external environment of the screw connector and the interior of the screw connector when the inside thread is screwed to the outside thread in a third angle-of-rotation range. ### Claim 2 (depends on 1) The screw connector according to claim 1, wherein the first formation is a local elevation on a thread flank of the outside thread. ### Claim 3 (depends on 1) The screw connector according to claim 1, wherein the recess in the base of the thread of the nut includes at least one through-opening between an interior of the nut and an exterior surrounding of the nut. ### Claim 4 (depends on 3) The screw connector according to claim 3, wherein the at least one through-opening includes a radial groove in an axial end face of the nut, and wherein the radial groove is open in a direction of the axial end face of the nut. ### Claim 5 (depends on 3) The screw connector according to claim 3, wherein the nut has at least one reinforcing rib arranged in an axial direction of the nut on an outer circumference thereof, and the at least one through-opening extends at least partially along the reinforcing rib. ### Claim 6 (depends on 1) The screw connector according to claim 1, wherein the first connecting element and the second connecting element are each configured as complementary halves of a Luer-Lock connector. ### Claim 7 (depends on 1) The screw connector according to claim 1, wherein the second connecting element has a sealing cap with a sealing structure. ### Claim 8 (depends on 7) The screw connector according to claim 7, wherein the first lumen is configured as a female half of the Luer-Lock connector and the sealing structure is configured as a male half of the Luer-Lock connector. ### Claim 9 (depends on 1) The screw connector according to claim 1, wherein the second connecting element has a second lumen and the nut is configured as a union nut. ### Claim 10 (depends on 9) The screw connector according to claim 9, wherein the first lumen is configured as a female half of the Luer-Lock connector and the second lumen is configured as the male half of the Luer-Lock connector. ### Claim 11 (depends on 1) A medical hose system having a screw connector according to claim 1, wherein the medical hose system includes a blood hose set for an extracorporeal blood treatment, with the blood hose set having a patient arterial hose and a patient venous hose, and with a patient end of the patient arterial hose and the patient end of the patient venous hose each being configured as a second connecting element. ### Claim 12 (depends on 11) The medical hose system according to claim 11, wherein the medical hose system includes a three-way connector with three connected lumens, with at least two of the three connected lumens each being configured as the first connecting element. ### Claim 13 (depends on 12) The medical hose system according to claim 12, wherein the medical hose system is configured for short-circuiting the patient end of the patient arterial hose and the patient end of the patient venous hose with the three-way connector. ### Claim 14 (depends on 11) The medical hose system according to claim 11, wherein the end of the patient arterial hose opposite the patient end of the patient arterial hose, and the end of the patient venous hose opposite the patient end of the patient venous hose, are each connected to a blood cassette for the extracorporeal blood treatment. ### Claim 15 (depends on 11) The medical hose system according to claim 11, wherein the medical hose system has at least one addition site for an addition of medical fluids, with the addition site being configured as the first connecting element for connection to a sealing cap configured as the second connecting element. ### Claim 16 (depends on 1) The screw connector according to claim 1, wherein the gas permeability facilitates a gas sterilization and/or a steam sterilization of a medical hose system associated with an extracorporeal blood treatment, with the medical hose system including a blood hose set having a patient arterial hose and a patient venous hose, and with the patient end of the patient arterial hose and the patient end of the patient venous hose each deign being configured as the second connecting element. ### Claim 17 (depends on 2) The screw connector according to claim 2, wherein the local elevation is a nose or a lobe on an outside diameter of the outside thread.