US4747829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-filled syringe
Assignee: Centre de Recherche Industrielle du Quebec CRIQ
•
Filing: 1987-01-21
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Granted: 1988-05-31
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Expires: 2007-01-21
Abstract
Abstract A pre-filled syringe is provided with a retractile needle. The needle end of a syringe (100) is enclosed in a sterile chamber (109) within a casing (108) sealed by a cap (110) with a break-off tip (112). The barrel of the syringe is movable within the casing from a remote pre-injection position to a forward injection position and back again. When the barrel is moved forward a first end of the needle passes through the opening of the cap (110) and then the opposite end comes in contact with the injectant (128). When the barrel is withdrawn to a pre-injection position, the needle is retracted within the casing and is prevented from re-entering the opening in the cap.
Inventors
- 👤 Jean-Louis Jacob
- 👤 Gaetan Sanschagrin
- 👤 Jean Thibodeau
- 👤 France Guay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:50
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3243; A61M5/322; A61M2005/3117; A61M2005/3118; A61M2005/312; A61M5/3221; A61M2005/3223; A61M2005/3224; A61M2005/3226; A61M2005/3231; A61M5/34; A61M2005/342; A61M5/002; A61M5/28; A61M5/285; A61M5/288; A61M5/50; A61M5/5086
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
163 words
An apparatus for a one time injection of a liquid injectant comprising: a hollow cylindrical casing having a first open end and a second opposite end; a barrel for holding said injectant, said barrel disposed at a first end to slide through said first open end of said casing from a remote pre-injection position to a forward injection position and back again; means coupled to said barrel for ejecting said injectant; a hollow needle disposed within said casing and having an opening at each end thereof; means for extending said needle through said casing second end and placing said needle in fluid communication with said injectant when said barrel moves from said remote pre-injection position to said forward injection position and for retracting said needle through said casing second end into said casing when said barrel moves back again to said pre-injection position; and means for blocking automatically said needle from extending through said casing second end after said needle has been retracted.
Claim 2
Independent Claim
163 words
An apparatus for a one time injection of a liquid injectant comprising: a hollow cylindrical casing having a first open end and a second opposite end; a barrel for holding said injectant, said barrel disposed at a first end to slide through said first open end of said casing from a remote pre-injection position to a forward injection position and back again; means coupled to said barrel for ejecting said injectant; a hollow needle disposed within said casing and having an opening at each end thereof; means for extending said needle through said casing second end and placing said needle in fluid communication with said injectant when said barrel moves from said remote pre-injection position to said forward injection position and for retracting said needle through said casing second end into said casing when said barrel moves back again to said pre-injection position; and means for blocking automatically said needle from extending through said casing second end after said needle has been retracted.
Claim 3
Dependent Claim
121 words
The apparatus of claim 1 wherein said needle blocking means comprises: a planar housing with parallel and spaced apart walls attached along their periphery by an annular wall, said housing perpendicular to said needle, each of said walls having an opening lying along a common axis; a disc disposed within said housing between said planar walls, said disc having an aperture therethrough, said disc movable within said housing between a position wherein said aperture is aligned with the openings in said planar walls and a position wherein the aperture is non-aligned with the openings in said planar walls, said needle located through said planar wall openings and said disc aperture before said single use, and withdrawn from said apertures after retraction.
Claim 4
Dependent Claim
30 words
The apparatus of claim 2 wherein said needle blocking means further comprises: a spring located between said disc and said annular wall for biasing said disc into said non-alignment position.
Claim 5
Dependent Claim
114 words
The apparatus of claim 1 wherein said extending and retracting means comprises: means for engaging said needle to extend said needle through said casing second end when said barrel moves to said forward injection position; and a first stop cock fixed to said needle intermediate said second end of said casing and said engaging means at a predetermined distance from said casing second end such that, when said barrel moves from said remote pre-injection position to said injection position, said stop cock engages said second end of said casing and said engaging means engages said stop cock to force said second end of said needle through said stopper into fluid communication with said injectant.
Claim 6
Dependent Claim
44 words
The apparatus of claim 4 wherein said apparatus further comprises: a second stop cock fixed to said needle intermediate said first stop cock and said second end of said casing for controlling the length of extension of said needle through said casing second end.
Claim 7
Dependent Claim
57 words
The apparatus of claim 4 wherein said engaging means comprises a stopper inserted in said first end of said barrel having a channel open at a first end to receive a first end of said needle, said channel closed at its opposite end to prevent contact between said injectant and said needle before said one time injection.
Claim 8
Dependent Claim
27 words
The apparatus of claim 6 wherein said opening at said first end of said needle is a lateral opening spaced apart from the tip of said needle.
Claim 9
Dependent Claim
22 words
The apparatus of claim 7 wherein said needle comprises a hook located at the tip of said first end of said needle.
Claim 10
Dependent Claim
28 words
The apparatus of claim 4 wherein said engaging means comprises a diaphragm means stretched across said first end of said barrel for separating said injectant from said needle.
Claim 11
Dependent Claim
68 words
The apparatus of claim 1 wherein said apparatus further comprises a cap coupled to said second end of said casing, said cap having a protrusion extending axially outwardly from said second end of said casing and a channel through said protrusion opening into the hollow interior of casing at one end, said protrusion, channel disposed to receive said needle as it is extended through said casing second end.
Claim 12
Dependent Claim
36 words
The apparatus of claim 10 wherein said cap further comprises a break-off tip which closes off said channel in said protrusion, said break-off tip adapted to be broken off to open said channel to ambient atmosphere.
Claim 13
Dependent Claim
16 words
The apparatus of claim 11 wherein said cap, break-off tip and said casing are integrally formed.
Claim 14
Dependent Claim
46 words
The apparatus of claim 10 wherein said blocking means comprises: said cap rotatably mounted to said second end of said casing and rotatable from an injection position to a non-injection position, said channel through said protrusion disposed to receive said needle only in said injection position.
Claim 15
Dependent Claim
25 words
The apparatus of claim 1 wherein said ejecting means comprises a plunger disposed to enter an open second end of said barrel opposite said casing.
Claim 16
Dependent Claim
72 words
The apparatus of claim 14 wherein said plunger further comprises a piston rod coupled at a first end to a piston adapted for sliding and sealing engagement with the interior wall of said barrel, the end of said piston rod opposite said first end and the length of said piston rod being such that substantially all of said piston rod including said second end fits snugly within said barrel after the injection.
Claim 17
Dependent Claim
37 words
The apparatus of claim 1 wherein said blocking means comprises: a pre-stressed needle; and means for preventing extension of said pre-stressed needle through said casing second end when said needle is in a stressed position after retraction.
Claim 18
Dependent Claim
24 words
The apparatus of claim 16 wherein said needle extension preventing means comprises: an opening in a wall portion closing off said casing second end.
Claim 19
Dependent Claim
83 words
The apparatus of claim 16 wherein said extension preventing means comprises: a cap coupled to said second end of said casing, said cap having a protrusion extending axially outwardly from said second end of said casing and a channel through said protrusion opening into the hollow interior of said casing at one end, said protrusion receiving said needle at said at one end of said protrusion before the one time injection, but unable to receive said needle after retraction because of said pre-stressing.
Claim 20
Independent Claim
53 words
The apparatus of claims 10, 13 or 18 wherein said extending and retracting means further comprises a stopper inserted in said first end of said barrel having a channel open at a first end to receive a first end of said needle opposite the end of said needle disposed within said protrusion channel.
Claim 21
Dependent Claim
36 words
The apparatus of claim 19 wherein said cap further comprises a break-off tip which closes off said channel in said protrusion, said break-off tip adapted to be broken off to open said channel to ambient atmosphere.
Claim 22
Dependent Claim
16 words
The apparatus of claim 20 wherein said cap, break-off tip and said casing are integrally formed.
Claim 23
Independent Claim
94 words
The apparatus of claims 2, 10, 13, or 16 wherein said extending and retracting means comprises: a first stop cock fixed to said needle intermediate said second end of said casing and said engaging means at a predetermined distance from said casing second end such that, when said barrel moves from said remote pre-injection position to said injection position, said stop cock engages said second end of said casing and said engaging means engages said stop cock to force said second end of said needle through said stopper into fluid communication with said injectant.
Claim 24
Dependent Claim
44 words
The apparatus of claim 22 wherein said apparatus further comprises: a second stop cock fixed to said needle intermediate said first stop cock and said second end of said casing for controlling the length of extension of said needle through said casing second end.
Claim 25
Independent Claim
30 words
The apparatus of claims 2, 13, or 16 wherein said opening at said first end of said needle is a lateral opening spaced apart from the tip of said needle.
Claim 26
Independent Claim
25 words
The apparatus of claims 2, 13, or 16 wherein said needle comprises a hook located at the tip of said first end of said needle.
Claim 27
Independent Claim
32 words
The apparatus of claims 1, 2, 13 or 16 wherein said barrel comprises scale markings on the outside surface thereof whereby the amount of injectant ejected from said barrel can be monitored.
Claim 28
Dependent Claim
20 words
The apparatus of claim 15 wherein said piston rod and piston are coupled together by a thread and screw arrangement.
Claim 29
Independent Claim
29 words
The apparatus of claims 1, 2 or 3 wherein said extending and retracting means comprises a collar for rigidly attaching said needle to said first end of said barrel.
Claim 30
Dependent Claim
27 words
The apparatus of claim 28 wherein said apparatus further comprises means for positioning an injection end of said needle at a forward pre-injection position within said casing.
Claim 31
Dependent Claim
26 words
The apparatus of claim 29 wherein said positioning means comprises a protrusion within said casing interior intermediate said collar and the first end of said casing.
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |