US3874383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic needle with distortable hub liner
Assignee: Individual
•
Filing: 1973-03-21
•
Granted: 1975-04-01
•
Expires: 1993-03-21
Abstract
Abstract A hypodermic needle which comprises a cannula and metal hub together with a plastic insert which is non-rotatably fitted within the hub and interlocked therewith to prevent axial movement. The liner is heat-distortable during an attempted sterilization so as to render the needle non-reusable.
Inventors
- 👤 John J Glowacki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:38
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A hypodermic needle comprising a cannula, a metal hub having walls defining a well and a smaller nose portion, said nose portion receiving said cannula and securing said hub to said cannula, a plastic liner received within said hub well and having walls defining an inner well and covering the walls of said hub, said cannula extending into said liner, and means defined on the interior of said hub and the exterior of said liner in interlocking engagement to prevent rotational and axial movement of said liner with respect to said hub, said liner being of a material which is heat distortable at normal sterilizing temperatures.
Claim 2
Dependent Claim
106 words
A hypodermic needle comprising a cannula, a metal hub having walls defining a well and a smaller nose portion, said nose portion receiving said cannula and securing said hub to said cannula, a plastic liner received within said hub well and having walls defining an inner well and covering the walls of said hub, said cannula extending into said liner, and means defined on the interior of said hub and the exterior of said liner in interlocking engagement to prevent rotational and axial movement of said liner with respect to said hub, said liner being of a material which is heat distortable at normal sterilizing temperatures.
Claim 3
Dependent Claim
54 words
The needle of claim 1 wherein the means preventing rotation are a plurality of surfaces defined on said hub wall and disposed at an angle of less than 90* to the center line of the needle, and a like plurality of complimentary surfaces defined on said liner and in contact with said hub surfaces.
Claim 4
Dependent Claim
41 words
The needle of claim 1 wherein the means preventing rotation are a plurality of outstanding ribs defined on one of said hub and said liner and a plurality of rib-receiving slots defined in the other of said hub and said liner.
Claim 5
Dependent Claim
31 words
The needle of claim 1 wherein said means preventing axial movement comprise an annular recess defined in said hub walls and an annular ridge on said liner received in said recess.
Claim 6
Dependent Claim
24 words
The needle of claim 1 further including a locking flange defined on said liner and extending radially outwardly from said liner beyond said hub.
Claim 7
Dependent Claim
11 words
The needle of claim 1 wherein said liner is internally threaded.
Claim 8
Dependent Claim
23 words
The needle of claim 2 wherein said surfaces are disposed at an angle of substantially 27* to the center line of the needle.
Claim 9
Dependent Claim
12 words
The needle of claim 3 wherein said ribs are on the hub.
References Cited (Backward Citations)
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Cited
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Cited
US3721231A
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |