US4255996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle destroyer with improved mechanical advantage
Assignee: Allegiance Corp
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Filing: 1979-11-19
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Granted: 1981-03-17
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Expires: 1999-11-19
Abstract
Abstract A device having one embodiment for severing a hypodermic needle at its hub and cannula with a single motion. The device has hub and cannula cutters that are joined at a slidable joint and pivoted at noncoaxial pivot points to provide increased mechanical advantage to the cannula cutter. In another preferred embodiment, the same type cutting mechanism has its cutters spaced so as to sever a hypodermic syringe barrel and a cannula of a needle attached to the syringe barrel in a single motion.
Inventors
- 👤 Pradip V. Choksi
- 👤 William D. Christoffel
- 👤 Christopher J. C. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:25
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/3278; A61M2005/3282; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/944; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/215; Y10T83/2155; Y10T83/2159; Y10T83/222; Y10T83/869; Y10T83/8772; Y10T83/8798; Y10T83/8799; Y10T83/8801
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
61 words
A needle destroyer with a common opening for receiving and severing both the hub and cannula of a needle, wherein the improvement comprises: a hub cutter and a cannula cutter on the destroyer joined to each other at a movable joint providing a greater mechanical advantage at the cannula cutter than at the hub cutter when the joined cutters are actuated.
Claim 2
Dependent Claim
61 words
A needle destroyer with a common opening for receiving and severing both the hub and cannula of a needle, wherein the improvement comprises: a hub cutter and a cannula cutter on the destroyer joined to each other at a movable joint providing a greater mechanical advantage at the cannula cutter than at the hub cutter when the joined cutters are actuated.
Claim 3
Dependent Claim
20 words
A needle destroyer as set forth in claim 1, wherein the hub cutter has a cutting edge for severing thermoplastic.
Claim 4
Dependent Claim
15 words
A needle destroyer as set forth in claim 2, wherein the cutting edge is sharp.
Claim 5
Dependent Claim
20 words
A needle destroyer as set forth in claim 1, wherein the cannula cutter has a cutting edge for severing metal.
Claim 6
Dependent Claim
15 words
A needle destroyer as set forth in claim 4, wherein the cutting edge is blunt.
Claim 7
Dependent Claim
19 words
A needle destroyer as set forth in claim 1, wherein there is a sliding joint connecting the two cutters.
Claim 8
Dependent Claim
22 words
A needle destroyer as set forth in claim 1, wherein each cutter is pivoted to the destroyer and the pivots are noncoaxial.
Claim 9
Dependent Claim
32 words
A needle destroyer as set forth in claim 7, wherein the destroyer has spaced apart hub and cannula shear plates, and the hub and cannula cutters are respectively pivoted to these plates.
Claim 10
Dependent Claim
18 words
A needle destroyer as set forth in claim 1, wherein the joined cutters have a common actuating handle.
Claim 11
Dependent Claim
27 words
A needle destroyer as set forth in claim 1, wherein the destroyer has an openable housing with a removable receptacle for receiving severed pieces of a needle.
Claim 12
Dependent Claim
25 words
A needle destroyer as set forth in claim 1, wherein the destroyer includes a funnel structure for guiding insertion of the needle into the destroyer.
Claim 13
Dependent Claim
23 words
A needle destroyer as set forth in claim 1, wherein the destroyer has sweeping means to remove severed needle portions from the cutters.
Claim 14
Dependent Claim
16 words
A needle destroyer as set forth in claim 12, wherein the sweeping means is a spring.
Claim 15
Dependent Claim
70 words
A needle destroyer with a common opening for receiving and severing both the hub and cannula of a needle, wherein the improvement comprises: a hub cutter and a cannula cutter pivotally connected to the destroyer at pivot points that are noncoaxial, and the cutters are joined to a common actuating handle providing a greater mechanical advantage at the cannula cutter than at the hub cutter when the handle is moved.
Claim 16
Dependent Claim
70 words
A needle destroyer with a common opening for receiving and severing both the hub and cannula of a needle, wherein the improvement comprises: a hub cutter and a cannula cutter pivotally connected to the destroyer at pivot points that are noncoaxial, and the cutters are joined to a common actuating handle providing a greater mechanical advantage at the cannula cutter than at the hub cutter when the handle is moved.
Claim 17
Dependent Claim
63 words
A syringe and needle destroyer with a common opening for receiving and severing both a syringe and an attached needle's cannula, wherein the improvement comprises: a syringe cutter and a cannula cutter on the destroyer joined to each other at a movable joint providing a greater mechanical advantage at the cannula cutter than at the syringe cutter when the joined cutters are actuated.
Claim 18
Dependent Claim
63 words
A syringe and needle destroyer with a common opening for receiving and severing both a syringe and an attached needle's cannula, wherein the improvement comprises: a syringe cutter and a cannula cutter on the destroyer joined to each other at a movable joint providing a greater mechanical advantage at the cannula cutter than at the syringe cutter when the joined cutters are actuated.
Claim 19
Dependent Claim
22 words
A syringe and needle destroyer as set forth in claim 15, wherein the syringe cutter has a cutting edge for severing thermoplastic.
Claim 20
Dependent Claim
17 words
A syringe and needle destroyer as set forth in claim 16, wherein the cutting edge is sharp.
Claim 21
Dependent Claim
22 words
A syringe and needle destroyer as set forth in claim 15, wherein the cannula cutter has a cutting edge for severing metal.
Claim 22
Dependent Claim
17 words
A syringe and needle destroyer as set forth in claim 18, wherein the cutting edge is blunt.
Claim 23
Dependent Claim
21 words
A syringe and needle destroyer as set forth in claim 15, wherein there is a sliding joint connecting the two cutters.
Claim 24
Dependent Claim
24 words
A syringe and needle destroyer as set forth in claim 15, wherein each cutter is pivoted to the destroyer and the pivots are noncoaxial.
Claim 25
Dependent Claim
34 words
A syringe and needle destroyer as set forth in claim 21, wherein the destroyer has spaced apart syringe and cannula shear plates, and the syringe and cannula cutters are respectively pivoted to these plates.
Claim 26
Dependent Claim
20 words
A syringe and needle destroyer as set forth in claim 15, wherein the joined cutters have a common actuating handle.
Claim 27
Dependent Claim
31 words
A syringe and needle destroyer as set forth in claim 15, wherein the destroyer has an openable housing with a removable receptacle for receiving severed pieces of the syringe and needle.
Claim 28
Dependent Claim
27 words
A syringe and needle destroyer as set forth in claim 15, wherein the destroyer includes a funnel structure for guiding insertion of the needle into the destroyer.
Claim 29
Dependent Claim
27 words
A syringe and needle destroyer as set forth in claim 15, wherein the destroyer has sweeping means to remove severed syringe and needle portions from the cutters.
Claim 30
Dependent Claim
18 words
A syringe and needle destroyer as set forth in claim 26, wherein the sweeping means is a spring.
Claim 31
Dependent Claim
72 words
A syringe and needle destroyer with a common opening for receiving and severing both a syringe and an attached needle's cannula, wherein the improvement comprises: a syringe cutter and a cannula cutter pivotally connected to the destroyer at pivot points that are noncoaxial, and the cutters are joined to a common actuating handle providing a greater mechanical advantage at the cannula cutter than at the syringe cutter when the handle is moved.
Claim 32
Dependent Claim
72 words
A syringe and needle destroyer with a common opening for receiving and severing both a syringe and an attached needle's cannula, wherein the improvement comprises: a syringe cutter and a cannula cutter pivotally connected to the destroyer at pivot points that are noncoaxial, and the cutters are joined to a common actuating handle providing a greater mechanical advantage at the cannula cutter than at the syringe cutter when the handle is moved.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |