EP0288879A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Shielded safety syringe
Assignee: Habley Medical Technology Corp
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Filing: 1988-04-19
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Granted: —
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Expires: 2008-04-19
Abstract
Abstract A disposable syringe (1, 130 or 160) having particular application to vacuum tube phlebotomy and comprising respective inner (2, 132 or 162) and outer (4 or 134) needle carrying and protective cylinders which are coaxially aligned and axially extensible relative to one another. The inner and outer cylinders may be locked in a retracted position, whereby a hypodermic needle (22 or 138) is accessible for drawing blood samples from the patient to an evacuated tube (52) at the inner cylinder. After the last blood sample has been taken, the inner and outer cylinders may be locked in an axially extended position, whereby the hypodermic needle is completely surrounded and shielded by the outer protective cylinder so as to permit the safe handling of the syringe while avoiding an accidental needle strike and the possible spread of a contagious disease.
Inventors
- 👤 Terry M. Haber
- 👤 William H. Smedley
- 👤 Clark B. Foster
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 09:49
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/28; A61M5/31; A61M5/32; A61M5/3205; A61M5/321; A61M5/3243; A61M5/3271; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150206; A61B5/150259; A61B5/150374; A61B5/150381; A61B5/150389; A61B5/150473; A61B5/150496; A61B5/150534; A61B5/150572; A61B5/150633; A61B5/150641; A61B5/150694; A61B5/150717; A61B5/150732; A61B5/153; A61B5/154; A61M5/50; A61M5/3202; A61M5/3272
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
217 words
A shielded syringe (1, 130 or 160) characterized by an inner cylinder (2, 132 or 162) having proximal and distal ends and a hypodermic needle (22 or 138) supported by and extending outwardly from said distal end, syringe further characterized by: an outer sleeve (4 or 134) having proximal and distal ends and being coaxially aligned with and movable axially relative to said inner cylinder from a retracted position (FIGs. 1, 14 or 19), where said needle projects past the distal end of said outer sleeve, to a distally advanced position (FIGs. 2, 15 or 20), where said needle is located within and completely surrounded by said outer sleeve; first (6, 144 or 166) and second (10, 142 or 164) locking means being axially spaced from one another and projecting from one of said inner cylinder or said outer sleeve; and third locking means (34 or 152) projecting from the other of said inner cylinder or said outer sleeve; the continuous axial movement of said outer sleeve from the retracted position to the distally advanced position causing said third locking means to be received in the space (11, 146 or 168) between said first and second locking means to thereby lock said outer sleeve at the distally advanced position with said needle shielded by said outer sleeve.
Claim 2
Dependent Claim
217 words
A shielded syringe (1, 130 or 160) characterized by an inner cylinder (2, 132 or 162) having proximal and distal ends and a hypodermic needle (22 or 138) supported by and extending outwardly from said distal end, syringe further characterized by: an outer sleeve (4 or 134) having proximal and distal ends and being coaxially aligned with and movable axially relative to said inner cylinder from a retracted position (FIGs. 1, 14 or 19), where said needle projects past the distal end of said outer sleeve, to a distally advanced position (FIGs. 2, 15 or 20), where said needle is located within and completely surrounded by said outer sleeve; first (6, 144 or 166) and second (10, 142 or 164) locking means being axially spaced from one another and projecting from one of said inner cylinder or said outer sleeve; and third locking means (34 or 152) projecting from the other of said inner cylinder or said outer sleeve; the continuous axial movement of said outer sleeve from the retracted position to the distally advanced position causing said third locking means to be received in the space (11, 146 or 168) between said first and second locking means to thereby lock said outer sleeve at the distally advanced position with said needle shielded by said outer sleeve.
Claim 3
Dependent Claim
38 words
The syringe (1, 130 or 160) recited in claim 1, wherein said first locking means includes at least one ramp (7, 144 or 166) and said second locking means includes at least one stop (12, 142 or 164).
Claim 4
Dependent Claim
62 words
The syringe (1, 130 or 160) recited in claim 1, wherein said first locking means includes a plurality of ramps (7, 144 or 166) and said second locking means includes a plurality of stops (12, 142 or 164), said pluralities of ramps and stops extending around the periphery of said inner cylinder (2, 132 or 162) or outer sleeve (4 or 134).
Claim 5
Dependent Claim
31 words
The syringe recited in claim 3, wherein said plurality of ramps (7, 144 or 166) are arranged in interspersed alignment with respect to said plurality of stops (12, 142 or 164).
Claim 6
Dependent Claim
44 words
The syringe (1, 130 or 160) recited in claim 3, wherein said pluralities of ramps (7, 144 or 166) extend around the periphery of said inner cylinder (2, 132 or 162) in spaced, parallel alignment with said plurality of stops (12, 142 or 164).
Claim 7
Dependent Claim
23 words
The syringe (1, 130 or 160) recited in claim 1, wherein said third locking means includes at least one lip (34 or 152).
Claim 8
Dependent Claim
37 words
The syringe (1, 130 or 160) recited in claim 6, wherein said lip (34 or 152) extends around the periphery of the other of said inner cylinder (2, 132 or 162) or outer sleeve (4 or 134).
Claim 9
Dependent Claim
81 words
The syringe (1, 130 or 160) recited in claim 1, wherein said first locking means includes at least one ramp (7, 144 or 166) and said second locking means includes at least one stop (12, 142 or 164), said ramp and said stop projecting from said inner cylinder (2, 132 or 162) adjacent the distal end thereof; and said third locking means includes a lip (34 or 152) projecting from said outer sleeve (4 or 134) adjacent the proximal end thereof.
Claim 10
Dependent Claim
61 words
The syringe (1) recited in claim 8, wherein said inner cylinder (2) has a raised portion (11) lying below and located between said ramp (12) and said stop (7), the lip (34) of said outer sleeve (4) being received upon said raised portion after said outer sleeve is moved axially to the advanced portion and said lip rides up said ramp.
Claim 11
Dependent Claim
56 words
The syringe (1, 130 or 160) recited in claims 1-9, wherein said hypodermic needle (22 or 138) is double ended, one end of said needle communicating with the interior of said inner cylinder (2, 132 or 162) and the opposite end of said needle extending outwardly from said cylinder for penetrating the skin of a patient.
Claim 12
Dependent Claim
96 words
The syringe (1, 130 or 160) recited in claims 1-10, wherein said needle (22 or 138) is carried by a screw threaded hub (24 or 136) located at the distal end of said inner cylinder (2, 132 or 162), said outer sleeve (4 or 134) having a screw threaded neck (16, 140 or 163) formed at the distal end thereof, said screw threaded hub being received within and mated to said screw threaded neck to releasably retain said outer sleeve in the retracted position with said needle projecting past the distal end of said outer sleeve.
References Cited (Backward Citations)
No citation records indexed.
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