Connection system having a threaded nut

Patent metadata

Field	Value
Publication number	US-10753520-B2
Application number	US-201314652101-A
Country	US
Kind code	B2
Filing date	Dec 12, 2013
Priority date	Dec 13, 2012
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

The present invention relates to a connection system for components through which fluid flows in medicine and medical equipment, comprising a male connection cone (6, 30) and a threaded nut (7) least partially surrounding the connection cone (6) and having an internal thread (9), for captively connecting the male connection cone (6, 30) to a female receptacle of an additional component through which fluid flows. The invention is characterised in that the threaded nut (7) has radially circumferential through-holes (10) at least in some sections in the axial section of the circumferential jacket of the threaded nut and webs (11, 11′) are formed adjacent to the through-holes in the circumferential jacket, sections of the internal thread (9) being arranged on the inside of said webs in relation to the circumferential jacket. Furthermore, the invention also relates to the production of the connection system and to its use.

First claim

The invention claimed is:

1. A connection system for components through which fluid flows in medicine and medical equipment, the connection system comprising:
a male connection cone; and
a threaded nut including a circumferential jacket having an axial section at least partially surrounding the connection cone and having an internal thread, the threaded nut captively connecting the male connection cone to a female receptacle of an additional component through which fluid flows, the threaded nut having through-holes radially spaced about a circumference of the circumferential jacket in at least some portions of the axial section of the circumferential jacket, wherein webs are formed in the circumferential jacket adjacent to the through-holes, wherein sections of the internal thread are arranged on an inner surface of said webs in opposing relation to the through-holes and the internal thread sections are capable of being formed by projections of a mould through the through-holes opposing the internal thread sections, wherein the through-holes are at least as large as the opposing internal thread sections, wherein the internal thread sections are at least flanks of the internal thread, and wherein the internal thread sections are limited to regions of the webs;
wherein reinforcement braces are also formed in the circumferential jacket adjacent to the through-holes and the reinforcement braces are arranged at an angle to the webs; and
wherein an edge of each of two of said through-holes is defined along one side of one of the reinforcement braces, with an edge of each of another two of said through-holes defined along another side of said one of the reinforcement braces.

2. The connection system according to claim 1 , wherein the internal thread is a double thread or a triple thread.

3. The connection system according to claim 2 , wherein for each thread of the double thread or the triple thread at least two through-holes are provided.

4. The connection system according to claim 1 , wherein the radially spaced through-holes and/or sections of the internal thread extend over at least ⅓ of the circumference of the circumferential jacket.

5. The connection system according to claim 1 , wherein at least one of (i) a maximum diameter of the internal thread is greater than 7.83 mm and smaller than 20 mm, and (ii) a pitch of the internal thread is greater than 1.3 mm and smaller than 5 mm.

6. The connection system according to claim 1 , wherein at least some parts of the connection system are made from a material selected from a group consisting of duroplastics and thermoplastics and polyphenylene sulfide, polypropylene, poly-1-butene, polyvinyl chloride, polyvinylidene chloride, polymethyl metaacrylate, polymethyl methacrylate, polyacrylonitrile, polystyrene, polysulfone, polyacetal, polyvinyl alcohol, polyvinyl acetate, ethylene vinyl acetate (EVA), mixtures comprising ethylene vinyl acetate and polyethylene, ethylene vinylacetate copolymer (EVAC) ionomers, fluorocarbon plastic, polyethylene, polyamide, a partially aromatic polyamide, polycarbonate, polyester, polyphenylene oxide, polysulfone, polyvinyl acetal, polyurethane, and chlorinated polyether, cellulose nitrate, cellulose acetate, cellulose ether, phenolic resin, urea resin, thiourea resin, melamine resin, alkyl resin, allyl resin, silicon, polyimide, polybenzimidazole, epoxy resin, casein plastic, crosslinked polyurethane, unsaturated polyester resin, antimicrobial or antiseptic material, highly-porous silver, silver manufactured without ions, silver alloys and microsilver, metal-ions-releasing compounds, materials free of bisphenol A, Tritan, Terlux, acrylonitrile-butadiene-styrene, and combinations thereof.

7. The connection system according to claim 1 , wherein the threaded nut is designed as a Luer lock component and is rotatably connected to the connection cone.

8. The connection system according to claim 1 , wherein the connection system is capable of being used with infusion tubes, transfusion tubes, Y-connectors, multiway valves, multiple distributors, injection equipment, syringes, access devices, and combinations thereof.

9. An injection moulding method for the manufacture of a connection system, the method comprising:
selecting a mould configured to make a threaded nut including a circumferential jacket having an axial section configured to at least partially surround a male connection cone and having an internal thread, the threaded nut configured to captively connect the male connection cone to a female receptacle of an additional component through which fluid flows, the threaded nut having through-holes radially spaced about a circumference of the circumferential jacket in at least some portions of the axial section of the circumferential jacket, wherein webs are formed in the circumferential jacket adjacent to the through-holes, wherein sections of the internal thread are arranged on an inner surface of said webs in opposing relation to the through-holes and are formed by projections of the mould through the through-holes opposing the internal thread sections, wherein the through-holes are at least as large as the opposing internal thread sections, wherein the internal thread sections of the internal thread are at least the flanks of the internal thread, wherein the internal thread sections are limited to regions of the webs;
wherein reinforcement braces are also formed in the circumferential jacket adjacent to the through-holes and the reinforcement braces are arranged at an angle to the webs; and
wherein an edge of each of two of said through-holes is defined along one side of one of the reinforcement braces, with an edge of each of another two of said through-holes defined along another side of said one of the reinforcement braces;
closing the mould;
injecting a plastic material;
cooling the plastic material in the mould; and
opening the mould and demoulding the threaded nut having the internal thread sections formed by the projections of the mould through the through-holes opposing the internal thread sections.

10. A connection system for components through which fluid flows in medicine and medical equipment, the connection system comprising:
a male connection cone; and
a threaded nut including a circumferential jacket having an axial section at least partially surrounding the connection cone and having an internal thread, the threaded nut captively connecting the male connection cone to a female receptacle of an additional component through which fluid flows, the threaded nut having through-holes radially spaced about a circumference of the circumferential jacket in at least some portions of the axial section of the circumferential jacket, wherein webs are formed in the circumferential jacket adjacent to the through-holes, wherein sections of the internal thread are arranged on an inner surface of said webs in opposing relation to the through-holes and the internal thread sections are capable of being formed by projections of a mould through the through-holes opposing the internal thread sections, wherein the through-holes are at least as large as the opposing internal thread sections, wherein the internal thread sections are at least flanks of the internal thread, and wherein the internal thread sections are limited to regions of the webs;
wherein reinforcement braces are also formed in the circumferential jacket adjacent to the through-holes and the reinforcement braces are arranged at an angle to the webs; and
wherein two of said reinforcement braces, opposed to each other, extend axially along the circumferential jacket and an edge of each of two of said through-holes is defined along one side of each of the two reinforcement braces, with an edge

Assignees

• Fresenius Kabi Deutschland Gmbh

Inventors

• Hopf Hans-Juergen
• Hopf Michael
• Kassal Norbert
• Hopf Alexander

Classifications

• A61M39/10 Primary

  Tube connectors; Tube couplings {(A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014)} · CPC title

• A61M2039/1088

  having a plurality of male connectors, e.g. Luer connectors · CPC title

• A61M2039/1027

  Quick-acting type connectors · CPC title

• F16L21/08 Primary

  with additional locking means (F16L21/06 takes precedence; couplings of the quick-acting type F16L37/00) · CPC title

• F16L2201/44

  sterile · CPC title