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EP0142222A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Infusion hub and tubing assembly
Assignee: Warner Lambert Co LLC
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Filing: 1984-08-17
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Granted: —
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Expires: 2004-08-17
Abstract
Abstract @ A hub and tubing assembly (100) suitable for use in intravenous infusion is disclosed, which assembly (100) is formed as an integral unit from polyurethane and comprises: a length of flexible polyurethane tubing (104); and a fluid-receiving hub (102) having a first end region (110) adapted to be connected to a source of infusion fluid, a second end region (118) adapted to receive one end of the flexible polyurethane tubing, and a passageway (116, 118) for allowing infusion fluid to flow to the tubing (104); wherein hub (102) and tubing (104) are bonded into an integral unit (100) by means of radio frequency heating. The assembly is not difficult to produce, and can be made leakproof in the region of the bond.
Inventors
- 👤 Robert Louis Cartmell
- 👤 Charles William Daugherty
- 👤 David Bruce Ireland
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:27
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0014; B; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/63; B29C66/70; B29C66/71; B29C66/73; B29C66/731; B29C66/7315; B29C66/73151; B29C66/73152; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81431; B29C66/83; B29C66/832; B29C66/8322; B29C66/84; B29C66/857; B29C66/81411; B29C66/81421; B29C66/81423; B29C66/90; B29C66/91; B29C66/919; B29C66/94; B29C66/949; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A hub and tubing assembly suitable for use in intravenous infusion, which assembly is formed as an integral unit from polyurethane and comprises: a length of flexible polyurethane tubing; and a fluid-receiving hub having a first end region adapted to be connected to a source of infusion fluid, a second end region adapted to receive one end of the flexible polyurethane tubing, and a passageway for allowing infusion fluid to flow to the tubing; wherein hub and tubing are bonded into an integral unit by means of radio frequency heating.
Claim 2
Dependent Claim
90 words
A hub and tubing assembly suitable for use in intravenous infusion, which assembly is formed as an integral unit from polyurethane and comprises: a length of flexible polyurethane tubing; and a fluid-receiving hub having a first end region adapted to be connected to a source of infusion fluid, a second end region adapted to receive one end of the flexible polyurethane tubing, and a passageway for allowing infusion fluid to flow to the tubing; wherein hub and tubing are bonded into an integral unit by means of radio frequency heating.
Claim 3
Dependent Claim
36 words
An assembly as claimed in Claim 1, wherein the second end region of the hub includes a tubing stop means for defining a tubing insertion point beyond which the tubing cannot be inserted into the hub.
Claim 4
Dependent Claim
37 words
An assembly as claimed in Claim 2, wherein the tubing stop means comprises an internal shoulder sized to engage the end of the tubing as it is inserted into the hub to define the tubing insertion point.
Claim 5
Dependent Claim
22 words
An assembly as claimed in Claim 1, 2 or 3, wherein the hub is formed from a harder polyurethane than the tubing.
Claim 6
Independent Claim
143 words
A method for making an integral polyurethane hub and tubing assembly suitable for use in intravenous infusion, the assembly comprising a fluid-receiving hub and a length of tubing, the hub having a first end region adapted to be connected to a source of infusion fluid, a second end region adapted to receive one end of the tubing, and a passageway for allowing infusion fluid to flow from the first to the second end of the hub: which method comprises:- inserting one end of the length of tubing into the second end region of the hub: and applying radio frequency energy to that zone of the hub into which the tubing is inserted to heat sufficiently the hub zone and the tubing such that the polyurethane materials of the hub and the tubing flow into one another to weld the tubing into the hub.
Claim 7
Independent Claim
143 words
A method for making an integral polyurethane hub and tubing assembly suitable for use in intravenous infusion, the assembly comprising a fluid-receiving hub and a length of tubing, the hub having a first end region adapted to be connected to a source of infusion fluid, a second end region adapted to receive one end of the tubing, and a passageway for allowing infusion fluid to flow from the first to the second end of the hub: which method comprises:- inserting one end of the length of tubing into the second end region of the hub: and applying radio frequency energy to that zone of the hub into which the tubing is inserted to heat sufficiently the hub zone and the tubing such that the polyurethane materials of the hub and the tubing flow into one another to weld the tubing into the hub.
Claim 8
Dependent Claim
22 words
A method according to Claim 5, wherein the radio frequency energy is applied at a frequency of from 1 to 100 mHz.
Claim 9
Dependent Claim
35 words
A method according to Claim 5 or 6, wherein the radio frequency energy is applied at a power level of from 10 to 5,000 watts and for a period of from 0.1 to 60 seconds.
Claim 10
Dependent Claim
21 words
A method according to Claim 5, 6 or 7, wherein the hub is formed from a harder polyurethane than the tubing.
Claim 11
Dependent Claim
23 words
An integral polyurethane catheter hub and tubing assembly formed in accordance with a method according to any one of Claims 5 to 8.
References Cited (Backward Citations)
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