US3584626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe
Assignee: Individual
•
Filing: 1968-08-27
•
Granted: 1971-06-15
•
Expires: 1988-08-27
Abstract
Abstract A hypodermic syringe having a syringe body, a piston rod arranged movably in said body and an injection needle, in which the injection needle is housed inside said syringe body prior to the use of the syringe and when moved into its injection position is brought into sealing abutment with a seating arranged in the syringe body.
Inventors
- 👤 Lars Georg Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:16
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A hypodermic syringe comprising a tubular body, a hollow, open-ended tubular piston mounted for axial movement within said body and in sealing engagement therewith, an injection needle axially mounted within said tubular piston and extensible from said body through an aperture in one end portion of said body, said aperture defining a seat in sealing engagement with said needle when said needle is fully extended from said body, a further piston mounted for axial movement within said tubular piston and having means in engagement with said needle operable to cause movement of said needle from its initial position within said tubular piston to its fully extended position, said engagement means being sealingly receivable by the end of said tubular piston proximate to said aperture, first abutment means for moving said tubular piston relative to said body and second abutment means for moving said further piston relative to said tubular piston.
Claim 2
Dependent Claim
150 words
A hypodermic syringe comprising a tubular body, a hollow, open-ended tubular piston mounted for axial movement within said body and in sealing engagement therewith, an injection needle axially mounted within said tubular piston and extensible from said body through an aperture in one end portion of said body, said aperture defining a seat in sealing engagement with said needle when said needle is fully extended from said body, a further piston mounted for axial movement within said tubular piston and having means in engagement with said needle operable to cause movement of said needle from its initial position within said tubular piston to its fully extended position, said engagement means being sealingly receivable by the end of said tubular piston proximate to said aperture, first abutment means for moving said tubular piston relative to said body and second abutment means for moving said further piston relative to said tubular piston.
Claim 3
Dependent Claim
47 words
A syringe according to claim 1, wherein one end portion of said tubular piston extends from the end of said body remote from said aperture, and the end portion of said further piston remote from said aperture is extendable through said one end of said tubular piston.
Claim 4
Dependent Claim
133 words
A syringe according to claim 2, wherein, when the needle is in its initial position, a tip of said needle extends through said aperture and the said remote end portion of the said further piston extends from the said one end of said tubular piston, said syringe further comprising first protective cap means detachably mountable on the said one end portion of said body to protect the tip of the needle, and second protective cap means detachably mountable on the said one end portion of said tubular piston to protect the said remote end portion of said tubular piston, said first protective cap means also being detachably mountable on said one end portion of the tubular piston, in place of said second protective cap means, when needle is in its fully extended position.
Claim 5
Dependent Claim
85 words
A syringe according to claim 3, wherein the other proximate end portion of said further piston includes a conical portion defining said engagement means, the other end portion of said tubular piston includes a seating for said conical portion, and said first protective cap means includes means engageable with said remote end of said further piston when said first protective cap means is mounted on the said end portion of said tubular piston to urge said conical portion into sealing engagement with the said seating.
Claim 6
Dependent Claim
23 words
A syringe according to claim 1, wherein the needle is retained in its fully extended position by a projection defined at said seat.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |