Patent US3713442A successfully refreshed from Google Patents.
US3713442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split needle assembly for catheter tube
Assignee: Individual
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Filing: 1970-09-08
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Granted: 1973-01-30
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Expires: 1990-09-08
Abstract
Abstract A split needle assembly for the placement of a catheter tube in a vein includes a sectional needle which is split longitudinally into smaller and larger needle sections having complementary edges. A removable retainer at the base of the needle sections holds them together during needle insertion and withdrawal and provides a grip for the user. Once the needle is inserted the catheter tube is advanced through the needle into the vein and secured in place, after which the needle is withdrawn, the retainer removed, and the needle sections separated for complete removal from the tube.
Inventors
- 👤 H Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:53
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0612; A61M25/0637
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A split needle assembly for the placement of a catheter tube in a vein comprising a sectional needle adapted to receive a catheter tube, said needle being split longitudinally to provide an arcuate, circumferentially smaller needle section and an arcuate, circumferentially larger needle section, said sections having longitudinal edges positively disengageable from one another, said edges including mating male and female portions within the arcuate outer perimeter of the sections, and a removable retainer for releasably holding said sections together along said interfitting edges during insertion of the needle into a vein and withdrawal of the needle along the catheter tube.
Claim 2
Dependent Claim
101 words
A split needle assembly for the placement of a catheter tube in a vein comprising a sectional needle adapted to receive a catheter tube, said needle being split longitudinally to provide an arcuate, circumferentially smaller needle section and an arcuate, circumferentially larger needle section, said sections having longitudinal edges positively disengageable from one another, said edges including mating male and female portions within the arcuate outer perimeter of the sections, and a removable retainer for releasably holding said sections together along said interfitting edges during insertion of the needle into a vein and withdrawal of the needle along the catheter tube.
Claim 3
Dependent Claim
101 words
A split needle assembly for the placement of a catheter tube in a vein comprising a sectional needle adapted to receive a catheter tube, said needle being split longitudinally to provide an arcuate, circumferentially smaller needle section and an arcuate, circumferentially larger needle section, said sections having longitudinal edges positively disengageable from one another, said edges including mating male and female portions within the arcuate outer perimeter of the sections, and a removable retainer for releasably holding said sections together along said interfitting edges during insertion of the needle into a vein and withdrawal of the needle along the catheter tube.
Claim 4
Dependent Claim
101 words
A split needle assembly for the placement of a catheter tube in a vein comprising a sectional needle adapted to receive a catheter tube, said needle being split longitudinally to provide an arcuate, circumferentially smaller needle section and an arcuate, circumferentially larger needle section, said sections having longitudinal edges positively disengageable from one another, said edges including mating male and female portions within the arcuate outer perimeter of the sections, and a removable retainer for releasably holding said sections together along said interfitting edges during insertion of the needle into a vein and withdrawal of the needle along the catheter tube.
Claim 5
Dependent Claim
24 words
A split needle assembly as set forth in claim 1 wherein said interfitting longitudinal edges are of a generally V-shaped tongue and groove configuration.
Claim 6
Dependent Claim
29 words
A split needle assembly as set forth in claim 1 wherein said interfitting longitudinal edges are of a generally globular tongue and groove configuration and interlock with one another.
Claim 7
Dependent Claim
19 words
A split needle assembly as set forth in claim 1 wherein said retainer releasably clamps said needle sections together.
Claim 8
Dependent Claim
25 words
A split needle assembly as set forth in claim 1 wherein said retainer is a frangible body integral with a portion of said needle sections.
Claim 9
Dependent Claim
130 words
A split needle assembly for the placement of a catheter tube in a vein comprising a sectional needle adapted to receive a catheter tube, said needle being split longitudinally to provide an arcuate, circumferentially smaller needle section and an arcuate, circumferentially larger needle section, said smaller needle section being approximately one-third of the total circumference of the needle and disengageable from the larger needle section, said sections having mating male and female edges within the outer arcuate perimeter of the sections which fit together to prevent lateral displacement between the sections, and a removable retainer at the base of said sections for releasably holding said sections together along said mating edges during the insertion of the needle into a vein and the withdrawal of the needle along the catheter tube.
Claim 10
Dependent Claim
130 words
A split needle assembly for the placement of a catheter tube in a vein comprising a sectional needle adapted to receive a catheter tube, said needle being split longitudinally to provide an arcuate, circumferentially smaller needle section and an arcuate, circumferentially larger needle section, said smaller needle section being approximately one-third of the total circumference of the needle and disengageable from the larger needle section, said sections having mating male and female edges within the outer arcuate perimeter of the sections which fit together to prevent lateral displacement between the sections, and a removable retainer at the base of said sections for releasably holding said sections together along said mating edges during the insertion of the needle into a vein and the withdrawal of the needle along the catheter tube.
Claim 11
Dependent Claim
20 words
A split needle assembly as set forth in claim 6 wherein said tongue edge is on the smaller needle section.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |