EP0326983A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A disposable safety syringe with hypodermic needle
Assignee: Vabin International SRL
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Filing: 1989-01-30
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Granted: —
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Expires: 2009-01-30
Abstract
Abstract A disposable safety syringe (1) with a hypodermic needle (10), of a type comprising a syringe body (2) inside which a plunger (13) is guided for sliding movement and wherein said needle (10) is guided for movement to an away position inside the syringe body (2), further comprises: an engagement peg (27) formed at the plunger (13) end (28) integrally therewith; a holding pad (29) for said needle (10) arranged to be movable within said body (2) and provided with a seat (30) for engagement with the peg (27); and an elastically yielding seal (15) having a non-uniform thickness and being attached to the plunger (13) end (28). The needle (10), as caught up after injection by the plunger peg engaging in a corresponding seat on the pad, is fully retracted into the syringe body and subjected to a sideways push from the seal (15) effective to offset it and make re-use of the syringe impossible.
Inventors
- 👤 Valter Bin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/322; A61M5/3234; A61M2005/3235
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 words
A disposable safety syringe (1) with a hypodermic needle (10), of a type comprising a syringe body (2) inside which a plunger (13) is guided for sliding movement, said needle (10) being guided for movement to an away position within the syringe body (2), characterized in that it comprises: an engagement peg (27) formed at the plunger (13) end (28) integrally therewith; a supporting pad (29) for said needle (10) arranged to be movable axially within said body (2), in said pad (29) there being formed an engagement seat (30) for said peg (27); and an elastically yielding seal (15) mounted to the plunger (13) end (28) to apply an elastic pressure offset from the needle axis and tending to bring the needle out of alignment once the needle has been retracted into said body.
Claim 2
Dependent Claim
135 words
A disposable safety syringe (1) with a hypodermic needle (10), of a type comprising a syringe body (2) inside which a plunger (13) is guided for sliding movement, said needle (10) being guided for movement to an away position within the syringe body (2), characterized in that it comprises: an engagement peg (27) formed at the plunger (13) end (28) integrally therewith; a supporting pad (29) for said needle (10) arranged to be movable axially within said body (2), in said pad (29) there being formed an engagement seat (30) for said peg (27); and an elastically yielding seal (15) mounted to the plunger (13) end (28) to apply an elastic pressure offset from the needle axis and tending to bring the needle out of alignment once the needle has been retracted into said body.
Claim 3
Dependent Claim
18 words
A syringe according to Claim 1, characterized in that said peg (27) has a substantially mushroom-shaped head (32).
Claim 4
Dependent Claim
31 words
A syringe according to Claim 1, characterized in that said seal (15) is affixed to the end (28) of the plunger (13) at a debased location relatively to said peg (27).
Claim 5
Dependent Claim
31 words
A syringe according to Claim 1, characterized in that said seal has a non-uniform thickness comprising a portion (31) defining at the surface a ramp sloping gently toward the pad (29).
Claim 6
Dependent Claim
103 words
A disposable safety syringe (10) with hypodermic needle (10), of a type comprising a syringe body (2) inside which a plunger (13) is guided for sliding movement, said needle (10) being guided for movement to an away position within the syringe body (2), characterized in that it comprises a coil spring (3) inserted in a pre-compressed state into said body (2) between the bottom wall (23) thereof and the head (33) of a rod (4) as an extension whereof said needle (10) is mounted, a yielding means being arranged to release said spring (3) on the plunger (13) end contacting said head (33).
Claim 7
Dependent Claim
103 words
A disposable safety syringe (10) with hypodermic needle (10), of a type comprising a syringe body (2) inside which a plunger (13) is guided for sliding movement, said needle (10) being guided for movement to an away position within the syringe body (2), characterized in that it comprises a coil spring (3) inserted in a pre-compressed state into said body (2) between the bottom wall (23) thereof and the head (33) of a rod (4) as an extension whereof said needle (10) is mounted, a yielding means being arranged to release said spring (3) on the plunger (13) end contacting said head (33).
Claim 8
Dependent Claim
62 words
A syringe according to Claim 5, characterized in that said means comprises an expansible washer (6) provided centrally with a bore (34), and a groove (14) extending radially to the syringe axis and being formed inside the body (2), in said bore (34) there being inserted a spreader member (7) adapted to expand the washer (6) and drive it into said groove.
Claim 9
Dependent Claim
23 words
A syringe according to Claim 5, characterized in that said head (33) is provided with a seal (5) making a peripherally tight fit.
Claim 10
Dependent Claim
33 words
A syringe according to Claim 5, characterized in that it comprises a stop (9) at the open end of the syringe body (2) effective to prevent said plunger (13) from slipping off completely.
Claim 11
Dependent Claim
34 words
A syringe according to Claim 6, characterized in that it comprises a pin (35) affixed to the plunger (13) end and arranged to act on said spreader member (7) to release said washer (6).
Claim 12
Dependent Claim
73 words
A syringe according to Claim 5, characterized in that it comprises a safety device mounted on the exterior of the body (2) adjacent to the needle (10), said device including a crescent-shaped shutter plate (11) journalled to the exterior of the bottom wall (23) of the syringe body and being constantly biased by a spring (12) toward a position where it blocks the bore (24) wherethrough said needle (10) is made to pass.
Claim 13
Dependent Claim
27 words
A syringe according to Claim 5, characterized in that said means comprises a C-like spring washer (26) and a small ball (25) force fitted into the washer.
Claim 14
Dependent Claim
40 words
A syringe according to Claim 5, characterized in that the bottom wall (23) of the body (2) comprises an interfitted end cap formed with a calibrated bore (24) through the center whereof the hypodermic needle (10) is made to pass.
References Cited (Backward Citations)
No citation records indexed.
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