Patent US5092852A successfully refreshed from Google Patents.
US5092852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety syringe for single use
Assignee: LIU ANTONY CHING-GONG
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Filing: 1991-02-15
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Granted: 1992-03-03
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Expires: 2011-02-15
Abstract
Abstract A safety syringe includes a protective cap resiliently held on a needle of the syringe for preventing an unexpected injury to someone stuck by the needle, a locking tab detachably clamped on a needle holder of the needle, and at least a protrusion formed on the needle holder operatively engageable with a protrusion groove formed in a needle sleeve, whereby upon a removal of the locking tab from the needle holder and upon an inward depression of the needle holder and the needle into the needle sleeve to engage the protrusion on the needle holder with the groove formed in the sleeve, the needle will be permanently locked into the needle sleeve for a safer disposal of the needle with the sleeve.
Inventors
- 👤 Edward Poling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:47
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3213; A61M5/3243; A61M5/3257
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
218 words
A safety syringe comprising: a syringe having an adapter formed thereon; a needle means including a needle holder securable to the adapter of the syringe, an annular groove circumferentially formed in an outer surface of the needle holder, at least a protrusion formed on the needle holder, and a hollow needle secured to the needle holder having a tip formed on a lowest end of said needle; a protective cap resiliently secured to said needle holder for normally shielding the tip of the needle; a locking means engageably secured on said annular groove in said needle holder normally preventing a downward locking of said needle means in a needle sleeve; and the needle sleeve including a sleeve body having a central sleeve hole formed in the sleeve body engageable with said needle holder for storing said needle in said sleeve hole, and a protrusion groove annularly formed in said sleeve body operatively engageable with said protrusion of said needle means, whereby upon a removal of said locking means from said needle means and upon a depression of said needle means into said needle sleeve to engage said protrusion on said needle means with said protrusion groove in said needle sleeve, said needle with said needle means will be permanently locked in said sleeve for a safe disposal thereof.
Claim 2
Dependent Claim
218 words
A safety syringe comprising: a syringe having an adapter formed thereon; a needle means including a needle holder securable to the adapter of the syringe, an annular groove circumferentially formed in an outer surface of the needle holder, at least a protrusion formed on the needle holder, and a hollow needle secured to the needle holder having a tip formed on a lowest end of said needle; a protective cap resiliently secured to said needle holder for normally shielding the tip of the needle; a locking means engageably secured on said annular groove in said needle holder normally preventing a downward locking of said needle means in a needle sleeve; and the needle sleeve including a sleeve body having a central sleeve hole formed in the sleeve body engageable with said needle holder for storing said needle in said sleeve hole, and a protrusion groove annularly formed in said sleeve body operatively engageable with said protrusion of said needle means, whereby upon a removal of said locking means from said needle means and upon a depression of said needle means into said needle sleeve to engage said protrusion on said needle means with said protrusion groove in said needle sleeve, said needle with said needle means will be permanently locked in said sleeve for a safe disposal thereof.
Claim 3
Dependent Claim
24 words
A safety syringe according to claim 1, wherein said protrusion of said needle means is formed with a ratchet extension on said needle holder.
Claim 4
Dependent Claim
60 words
A safety syringe according to claim 1, wherein said protective cap includes a central needle hole formed therein for passing said needle therethrough, and a tensioning spring having a lower spring end secured with said cap and an upper spring end secured to said needle holder, said cap normally shielding said tip of said needle as urged by said spring.
Claim 5
Dependent Claim
52 words
A safety syringe according to claim 1, wherein said locking means includes: a handle, an U-shaped retainer secured with said handle engageable with said annular groove formed in said needle holder, and a spring clip secured to said retainer for clamping said locking means on said annular groove of said needle means.
Claim 6
Dependent Claim
57 words
A safety syringe according to claim 4, wherein said spring clip of said locking means includes two clamping portions protruding outwardly from said U-shaped retainer defining an aperture between the two clamping portions, said aperture having a width less than a diameter of said annular groove in said needle holder having a cross section generally cylindrical shaped.
Claim 7
Dependent Claim
17 words
A safety syringe according to claim 3, wherein said protective cap is made of transparent plastic materials.
Claim 8
Dependent Claim
36 words
A safety syringe according to claim 1, wherein said needle sleeve includes a finger protector generally formed as a shielding flange protruding radially outwardly from a top periphery of said sleeve body of said needle sleeve.
Claim 9
Dependent Claim
67 words
A safety syringe according to claim 4, wherein said annular groove of said needle holder engaged with said locking means is positioned under said protrusion of said needle holder, said locking means after being engaged with said annular groove in said needle holder normally retained above said finger protector of said sleeve to prevent a downward locking of said needle into said sleeve before using said needle.
Claim 10
Dependent Claim
31 words
A safety syringe according to claim 7, wherein said finger protector is formed with a cone shape tapered downwardly towards said sleeve adapted for smoothly receiving the tip of said needle.
Claim 11
Dependent Claim
43 words
A safety syringe according to claim 9, wherein said finger protector formed as a cone shape includes a flat path recessed in said protector for an insertion of said locking means to be engaged with the annular groove formed in said needle holder.
Claim 12
Dependent Claim
43 words
A safety syringe according to claim 1, wherein said needle sleeve is integrally formed with a first strap secured with said locking means and formed with a second strap secured with a plug sealable in a central hole formed in said needle holder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |