US3825002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge syringe and crimped needle assembly
Assignee: Amalgamated Dental Co Ltd
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Filing: 1972-02-07
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Granted: 1974-07-23
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Expires: 1992-02-07
Abstract
Abstract The invention provides a double-ended hypodermic injection needle comprising a double-ended cannula having mounted along the length thereof holding means comprising a body part engaging therewith and dividing it into two parts, namely an injection part and a cartridge part, the body member being provided with a skirt extending around the cartridge-piercing part of the cannula and at least a part of the outer surface of the skirt being provided with suitably longitudinally extending ribs, for engaging an internal screw thread in the body of a syringe in screw-thread relationship. The rim of the skirt preferably extends beyond the end of the cartridge-piercing part of the cannula and the injection part of the cannula may be protected by an elongated cap.
Inventors
- 👤 A Paige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:13
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/34; A61M5/002
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
In combination: a syringe having a body with an axial passage, one end of said body being open-ended and provided with an internal screw thread; a pierceable cartridge received in said passage; and a double-ended needle including an axially extending, double-ended cannula having an injection part at one end and another end part at the other end piercing said cartridge; and holding means comprising a hub mounted on said cannula interjacent said cannula parts, provided with an axially projecting skirt extending around, and in radially spaced relation with, said cartridge piercing part, said skirt axially internally receiving an end portion of said cartridge, substantially the entire length of said skirt being threaded and threadedly received by the internal screw thread of said body so that, as said skirt is threadedly received by said internal screw thread, said skirt is crimped against said end portion of said cartridge to grip said end portion and produce in situ in said syringe a cartridge-needle assembly which can be removed as a unit from the syringe.
Claim 2
Dependent Claim
172 words
In combination: a syringe having a body with an axial passage, one end of said body being open-ended and provided with an internal screw thread; a pierceable cartridge received in said passage; and a double-ended needle including an axially extending, double-ended cannula having an injection part at one end and another end part at the other end piercing said cartridge; and holding means comprising a hub mounted on said cannula interjacent said cannula parts, provided with an axially projecting skirt extending around, and in radially spaced relation with, said cartridge piercing part, said skirt axially internally receiving an end portion of said cartridge, substantially the entire length of said skirt being threaded and threadedly received by the internal screw thread of said body so that, as said skirt is threadedly received by said internal screw thread, said skirt is crimped against said end portion of said cartridge to grip said end portion and produce in situ in said syringe a cartridge-needle assembly which can be removed as a unit from the syringe.
Claim 3
Dependent Claim
170 words
In combination: a syringe having a body with an axial passage for receiving a pierceable cartridge, one end of said body being open-ended and provided with an internal screw thread; and a double-ended needle for said syringe including an axially extending double-ended cannula having an injection part at one end and a cartridge piercing part at the opposite end, holding means, including a hub mounted on said cannula interjacent said parts, provided with an axially projecting skirt extending around, and in radially spaced relation with, said cartridge piercing part, for internally receiving a pierceable end portion of said cartridge, substantially the entire length of said skirt being threaded and threadedly received by the internal screw thread on said syringe body so that as said skirt is threadedly received by said internal screw thread, said skirt is crimped against the side of said cartridge end portion to grip said end portion and produce in situ in said syringe a cartridge-needle assembly which can be removed as a unit from the syringe.
Claim 4
Dependent Claim
170 words
In combination: a syringe having a body with an axial passage for receiving a pierceable cartridge, one end of said body being open-ended and provided with an internal screw thread; and a double-ended needle for said syringe including an axially extending double-ended cannula having an injection part at one end and a cartridge piercing part at the opposite end, holding means, including a hub mounted on said cannula interjacent said parts, provided with an axially projecting skirt extending around, and in radially spaced relation with, said cartridge piercing part, for internally receiving a pierceable end portion of said cartridge, substantially the entire length of said skirt being threaded and threadedly received by the internal screw thread on said syringe body so that as said skirt is threadedly received by said internal screw thread, said skirt is crimped against the side of said cartridge end portion to grip said end portion and produce in situ in said syringe a cartridge-needle assembly which can be removed as a unit from the syringe.
Claim 5
Dependent Claim
24 words
A needle according to claim 1 in which the rim of the skirt extends beyond the end of the cartridge-piercing part of the cannula.
Claim 6
Dependent Claim
29 words
A needle according to claim 1 in which the skirt is provided on its inner surface with one or more projections adapted to engage with and hold a cartridge-end.
Claim 7
Dependent Claim
45 words
The combination as set forth in claim 1 wherein said skirt comprises deformable plastic material, the dimensions of said skirt, said body and said cartridge being such that said skirt is deformed against the outer cartridge surface when said skirt is threaded in said body.
References Cited (Backward Citations)
US2677373A
Cited
US2778359A
Cited
US2737948A
Cited
US2953243A
Cited
US3043304A
Cited
US3074541A
Cited
US3234944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |