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US4484915A Expired / Lapsed US ⏱️ 0.0 years remaining

Medical syringe

Assignee: Individual
•
Filing: 1983-03-28
•
Granted: 1984-11-27
•
Expires: 2003-03-28
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Abstract

Abstract A medical syringe adapted for one hand operation in both aspiration and injection modes, employs an elongated hollow cylinder having at one end a first external flange extending at right angles to the axis of the cylinder and an opening for receiving a piston, the opposite end of the cylinder being adapted to detachably receive a hypodermic needle. The syringe also employed a piston extending slidably through said opening and being aligned with and centered on the axis of the cylinder, there being a liquid tight seal between said piston and said cylinder, one end of said piston being disposed outside said cylinder, said one end being enlarged and designated as a head, whereby when said cylinder and piston are held in one hand and said first flange and head are squeezed together, injection action ensues. The syringe also employs a device slidable back and forth along the outer surface of the cylinder, said device including a second flange extending at right angles to said axis and second flange extension elements extending from the second flange slidably over said first flange and engaging said head whereby when said cylinder and piston are held in one hand and said flanges are squeezed together, aspiration action ensues.

Inventors

  • 👤 John A. Tartaglia

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 05:31
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/0045; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/3148

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 215 words
A medical syringe adapted for one hand operation in both aspiration and injection modes, said syringe comprising: an elongated hollow cylinder having at one end a first external flange having cut out regions and extending at right angles to the axis of the cylinder and an opening for receiving a piston, the opposite end of the cylinder having means adapted to detachably receive a hypodermic needle: a piston somewhat longer than the cylinder which extends slidably through said opening and is aligned with and centered on the axis of the cylinder, there being a liquid tight seal between said piston and said cylinder, one end of said piston being disposed outside said cylinder, said one end being enlarged and designated as a head, whereby when said cylinder and piston are held in one hand and said first flange and head are squeezed together, injection action ensues; and a device slidable back and forth along the outer surface of the cylinder, said device including a second flange extending at right angles to said axis and second flange extension members extending from the second flange slidably through the regions of said first flange and engaging said head whereby when said cylinder and piston are held in one hand and said flanges are squeezed together, aspiration action ensues.
Claim 2
Dependent Claim 215 words
A medical syringe adapted for one hand operation in both aspiration and injection modes, said syringe comprising: an elongated hollow cylinder having at one end a first external flange having cut out regions and extending at right angles to the axis of the cylinder and an opening for receiving a piston, the opposite end of the cylinder having means adapted to detachably receive a hypodermic needle: a piston somewhat longer than the cylinder which extends slidably through said opening and is aligned with and centered on the axis of the cylinder, there being a liquid tight seal between said piston and said cylinder, one end of said piston being disposed outside said cylinder, said one end being enlarged and designated as a head, whereby when said cylinder and piston are held in one hand and said first flange and head are squeezed together, injection action ensues; and a device slidable back and forth along the outer surface of the cylinder, said device including a second flange extending at right angles to said axis and second flange extension members extending from the second flange slidably through the regions of said first flange and engaging said head whereby when said cylinder and piston are held in one hand and said flanges are squeezed together, aspiration action ensues.
Claim 3
Dependent Claim 42 words
The syringe of claim 1 wherein said members are oppositely disposed parallel and axially elongated, said members being secured at one set of corresponding ends to the second flange, the other set of corresponding ends of said members bearing against said head.
Claim 4
Dependent Claim 10 words
The syringe of claim 2 wherein said regions are slots.
Claim 5
Dependent Claim 22 words
The syringe of claim 3 wherein said piston is a hollow cylinder sealed at its head and open at its opposite end.

References Cited (Backward Citations)

US3316909A Cited
US3487834A Cited
US3990446A Cited
US4263911A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-11-27 1988-05-28 1988-11-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-11-27 1992-05-28 1992-11-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-11-27 1996-05-28 1996-11-27 $7700.00 Window Closed / Lapsed

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