US3825003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed-hypodermic syringe
Assignee: Astra USA Inc
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Filing: 1972-12-26
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Granted: 1974-07-23
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Expires: 1992-12-26
Abstract
Abstract A sealed hypodermic syringe comprising a cylindrical syringe body having a discharge opening at one end with a sealing membrane extending across the opening. A ferrule is disposed on the syringe body adjacent the discharge opening, the ferrule carrying a double-pointed needle and hub assembly arranged for longitudinal movement between an advanced position wherein the inner end of the needle is spaced from the sealing membrane, and a retracted position wherein the inner end pierces the membrane and communicates with fluid contained within the syringe body. A spring biases the needle to its retracted position, and a cover having a hollow bore houses the protruding portion of the needle. Press-fitted into the bore of the cover is an insert ring having locking shoulders which cooperate with ears of the needle-hub assembly to retain the needle in its advanced position against the action of the spring prior to the first use of the syringe. To ready the syringe for use the cover is turned slightly. This releases the advanced needle whereupon the action of the spring instantly snaps it to the retracted position, The inner end of the needle thereby pierces the sealing membrane and communicates with the syringe chamber, enabling discharge therefrom to be effected. Once the cover has been removed and the needle has snapped to its retracted, operative position, the cover can no longer be replaced and retained to house the needle. Thus, prior use of the syringe will be indicated.
Inventors
- 👤 R Kruck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:59
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/28; A61M5/285; A61M5/288; A61M5/31; A61M5/32; A61M5/3202; Y; Y10; Y10S; Y10S206/00; Y10S206/807
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
315 words
In a hypodermic syringe, the combination of: a. a syringe body having a discharge opening at one end, b. a sealing membrane extending across the discharge opening and adapted to be pierced in order to provide access to the syringe body, c. a ferrule secured to the syringe body at the dicharge opening, d. a double pointed needle, e. means mounting the needle in the ferrule for longitudinal movement between advanced and retracted positions, f. a needle hub secured to the needle at a point intermediate its ends, g. spring means biasing the needle to a retracted position wherein one end of the needle pierces the sealing membrane, h. a cover removably connected with the syringe body, and i. cooperable means on the cover and the needle hub, releasably holding the needle in an advanced position against the action of the spring means, j. said cooperable means releasing the needle hub in response to turning of the cover with respect to the syringe body through a small fractional part of a revolution, thereby to enable the spring means to snap the hub and needle to a retracted position wherein the membrane is pierced to enable discharge from the syringe body through the needle, k. said cover having a hollow bore to house the needle, l. said cooperable means comprising a shoulder in the bore of the cover, m. said needle hub having an outwardly extending ear engageable with and disengageable from the shoulder of the cover in response to turning of the latter in one direction or another, n. said shoulder comprising an insert ring press-fitted into the bore of the cover, and o. a stop carried in the bore of the cover on the ring and engageable with the ear of the needle hub when the needle is in the advanced position, for limiting turning movement of the cover with respect to the hub.
Claim 2
Dependent Claim
315 words
In a hypodermic syringe, the combination of: a. a syringe body having a discharge opening at one end, b. a sealing membrane extending across the discharge opening and adapted to be pierced in order to provide access to the syringe body, c. a ferrule secured to the syringe body at the dicharge opening, d. a double pointed needle, e. means mounting the needle in the ferrule for longitudinal movement between advanced and retracted positions, f. a needle hub secured to the needle at a point intermediate its ends, g. spring means biasing the needle to a retracted position wherein one end of the needle pierces the sealing membrane, h. a cover removably connected with the syringe body, and i. cooperable means on the cover and the needle hub, releasably holding the needle in an advanced position against the action of the spring means, j. said cooperable means releasing the needle hub in response to turning of the cover with respect to the syringe body through a small fractional part of a revolution, thereby to enable the spring means to snap the hub and needle to a retracted position wherein the membrane is pierced to enable discharge from the syringe body through the needle, k. said cover having a hollow bore to house the needle, l. said cooperable means comprising a shoulder in the bore of the cover, m. said needle hub having an outwardly extending ear engageable with and disengageable from the shoulder of the cover in response to turning of the latter in one direction or another, n. said shoulder comprising an insert ring press-fitted into the bore of the cover, and o. a stop carried in the bore of the cover on the ring and engageable with the ear of the needle hub when the needle is in the advanced position, for limiting turning movement of the cover with respect to the hub.
Claim 3
Dependent Claim
25 words
The invention as set forth in claim 1, wherein: a. said insert ring is of metal and said shoulder and said stop are carried thereon.
Claim 4
Dependent Claim
30 words
The invention as set forth in claim 1, wherein: a. the bore of said cover has an internal annular bead for permanently retaining the insert ring in a fixed position.
Claim 5
Dependent Claim
34 words
The invention as set forth in claim 1, and further including: a. sealing means carried on the cover and the ferrule for closing the bore of the cover and protecting the needle from contamination.
Claim 6
Dependent Claim
30 words
The invention as set forth in claim 4, wherein: a. said sealing means comprises an annular internal lip on the cover, and b. an annular external shoulder on the ferrule.
Claim 7
Dependent Claim
25 words
The invention as set forth in claim 1, wherein: a. said insert ring and shoulder, and said stop are constituted as a single, integral piece.
Claim 8
Dependent Claim
36 words
The invention as set forth in claim 1, wherein: a. said insert ring has a projecting tab biting into the inner wall of the cover, to prevent relative turning movement between the latter and said ring.
Claim 9
Dependent Claim
316 words
In a hypodermic syringe, the combination of: a. a syringe body having a discharge opening at one end, b. a sealing membrane extending across the discharge opening and adapted to be pierced in order to provide access to the syringe body, c. a ferrule secured to the syringe body at the discharge opening, d. a double pointed needle, e. means mounting the needle in the ferrule for longitudinal movement between advanced and retracted positions, f. a needle hub secured to the needle at a point intermediate its ends, g. spring means biasing the needle to a retracted position wherein one end of the needle pierces the sealing membrane, h. a cover removably connected with the syringe body, i. cooperable means on the cover anD the needle hub, releasably holding the needle in an advanced position against the action of the spring means, j. said cooperable means releasing the needle hub in response to turning of the cover with respect to the syringe body through substantially less than one-half of a revolution, thereby to enable the spring means to snap the hub and needle to a retracted position wherein the membrane is pierced to enable discharge from the syringe body through the needle, whereby the syringe is readied for use by mere rotation of the cover through a part of a turn, k. said cover having a hollow bore to house the needle, l. said cooperable means comprising a shoulder in the bore of the cover, m. said needle hub having an outwardly extending ear engageable with and disengageable from the shoulder of the cover in response to turning of the latter in one direction or another, and n. a stop carried in the bore of the cover and engageable with the ear of the needle hub when the needle is in the advanced position, for limiting turning movement of the cover with respect to the hub.
Claim 10
Dependent Claim
316 words
In a hypodermic syringe, the combination of: a. a syringe body having a discharge opening at one end, b. a sealing membrane extending across the discharge opening and adapted to be pierced in order to provide access to the syringe body, c. a ferrule secured to the syringe body at the discharge opening, d. a double pointed needle, e. means mounting the needle in the ferrule for longitudinal movement between advanced and retracted positions, f. a needle hub secured to the needle at a point intermediate its ends, g. spring means biasing the needle to a retracted position wherein one end of the needle pierces the sealing membrane, h. a cover removably connected with the syringe body, i. cooperable means on the cover anD the needle hub, releasably holding the needle in an advanced position against the action of the spring means, j. said cooperable means releasing the needle hub in response to turning of the cover with respect to the syringe body through substantially less than one-half of a revolution, thereby to enable the spring means to snap the hub and needle to a retracted position wherein the membrane is pierced to enable discharge from the syringe body through the needle, whereby the syringe is readied for use by mere rotation of the cover through a part of a turn, k. said cover having a hollow bore to house the needle, l. said cooperable means comprising a shoulder in the bore of the cover, m. said needle hub having an outwardly extending ear engageable with and disengageable from the shoulder of the cover in response to turning of the latter in one direction or another, and n. a stop carried in the bore of the cover and engageable with the ear of the needle hub when the needle is in the advanced position, for limiting turning movement of the cover with respect to the hub.
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) | 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 |