US3861972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravenous catheter
Assignee: Johnson and Johnson
•
Filing: 1972-10-20
•
Granted: 1975-01-21
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Expires: 1992-10-20
Abstract
Abstract A catheter-hub assembly is made by heat shrinking a single length of expanded plastic tubing into contact with a mandrel having a catheter forming portion and a hub forming portion, and simultaneously or subsequently reinforcing the section of tubing that overlies the hub forming portion of the mandrel to provide a relatively rigid hub construction. The reinforcement is preferably accomplished by simultaneously heat shrinking a plastic sleeve having a crosslinked outer surface and an uncrosslinked inner surface into contact with the hub section and forming a bond between the tubing and the sleeve by melting the uncrosslinked inner surface of the sleeve which is in contact with the tubing.
Inventors
- 👤 George M Glover
- 👤 Melvin Nimoy
- 👤 Dewitt R Petterson
- 👤 Albert J Volk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:20
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/66; A; A61; A61M; A61M25/00; A61M25/0009; B29C61/00; B29C61/02; B29C61/025; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5344; B29C66/70; B29C66/73; B29C66/737; B29C66/7371; B29C66/73715; B29C66/7375; B29C66/73751; B29C66/73755; B29C66/739; B29C66/7392; B29C66/7394; B29C66/71; B29K; B29K2009/00; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/10; B29K2023/12; B29K2023/18; B29K2023/22; B29K2027/00; B29K2027/12; B29K2027/16; B29K2027/18; B29K2105/00; B29K2105/24; B29K2105/246; B29L; B29L2031/00; B29L2031/753; B29L2031/7542; Y; Y10; Y10S; Y10S264/00; Y10S264/71; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
The method of making a plastic catheter-hub assembLy comprising the steps of: 1. providing a mandrel having a catheter forming portion and hub forming portion; 2. placing a length of irradiated-crosslinked expanded plastic tubing over said mandrel, one end of said tubing overlying said hub forming portion and the remainder of said tubing overlying said catheter forming portion; 3. placing an expanded plastic sleeve having an irradiatedcrosslinked outer surface and an uncrosslinked inner surface over said one end of said tubing; 4. applying heat to said tubing and said sleeve to cause said tubing to shrink into contact with said mandrel and to cause said sleeve to shrink into contact with said one end of said tubing, said heat being effective to melt said uncrosslinked inner surface to create a bond between said sleeve and said one end; and 5. removing said assembly from said mandrel.
Claim 2
Independent Claim
146 words
The method of making a plastic catheter-hub assembLy comprising the steps of: 1. providing a mandrel having a catheter forming portion and hub forming portion; 2. placing a length of irradiated-crosslinked expanded plastic tubing over said mandrel, one end of said tubing overlying said hub forming portion and the remainder of said tubing overlying said catheter forming portion; 3. placing an expanded plastic sleeve having an irradiatedcrosslinked outer surface and an uncrosslinked inner surface over said one end of said tubing; 4. applying heat to said tubing and said sleeve to cause said tubing to shrink into contact with said mandrel and to cause said sleeve to shrink into contact with said one end of said tubing, said heat being effective to melt said uncrosslinked inner surface to create a bond between said sleeve and said one end; and 5. removing said assembly from said mandrel.
Claim 3
Dependent Claim
32 words
placing a length of irradiated-crosslinked expanded plastic tubing over said mandrel, one end of said tubing overlying said hub forming portion and the remainder of said tubing overlying said catheter forming portion;
Claim 4
Dependent Claim
32 words
placing a length of irradiated-crosslinked expanded plastic tubing over said mandrel, one end of said tubing overlying said hub forming portion and the remainder of said tubing overlying said catheter forming portion;
Claim 5
Dependent Claim
31 words
The method of claim 1 wherein said sleeve is positioned over said one end of said tubing prior to placing said one end over the hub forming portion of said mandrel.
Claim 6
Dependent Claim
22 words
placing an expanded plastic sleeve having an irradiated-crosslinked outer surface and an uncrosslinked inner surface over said one end of said tubing;
Claim 7
Dependent Claim
22 words
placing an expanded plastic sleeve having an irradiated-crosslinked outer surface and an uncrosslinked inner surface over said one end of said tubing;
Claim 8
Dependent Claim
57 words
applying heat to said tubing and said sleeve to cause said tubing to shrink into contact with said mandrel and to cause said sleeve to shrink into contact with said one end of said tubing, said heat being effective to melt said uncrosslinked inner surface to create a bond between said sleeve and said one end; and
Claim 9
Dependent Claim
57 words
applying heat to said tubing and said sleeve to cause said tubing to shrink into contact with said mandrel and to cause said sleeve to shrink into contact with said one end of said tubing, said heat being effective to melt said uncrosslinked inner surface to create a bond between said sleeve and said one end; and
Claim 10
Dependent Claim
6 words
removing said assembly from said mandrel.
Claim 11
Dependent Claim
6 words
removing said assembly from said mandrel.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |