US4216771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic syringe with aspiration effect
Assignee: Individual
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Filing: 1977-12-05
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Granted: 1980-08-12
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Expires: 1997-12-05
Abstract
Abstract A hypodermic syringe is provided with aspiration effect and comprises a cylindrical member or ampoule, a piston, a piston rod and an aspiration rod, which is connected to the piston. The aspiration rod extends through a channel in the piston rod and is at its remote end from the piston provided with or connected to an actuating member. By means of said actuating member the aspiration rod can be displaced in the channel in the piston rod, thereby displacing the piston or a part of the piston relative to the ampoule, thus performing aspiration.
Inventors
- 👤 Sven Arlers
- 👤 LGunnar Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31511; A61M5/3148; A61M5/31515
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
209 words
An aspiration hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at an outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston wherein said actuating means comprises a transverse member pivotally connected at said outer end of said aspiration rod, said transverse member having a camming surface for engaging the outer end of said piston rod and axially moving said aspiration rod relative to said piston rod by rocking movement of said camming surface relative to said outer end of the piston rod.
Claim 2
Dependent Claim
209 words
An aspiration hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at an outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston wherein said actuating means comprises a transverse member pivotally connected at said outer end of said aspiration rod, said transverse member having a camming surface for engaging the outer end of said piston rod and axially moving said aspiration rod relative to said piston rod by rocking movement of said camming surface relative to said outer end of the piston rod.
Claim 3
Dependent Claim
15 words
Syringe of claim 1 including pivot means connecting said transverse member to said aspiration rod.
Claim 4
Dependent Claim
15 words
The syringe of claim 1 wherein said transverse member is integral with said aspiration rod.
Claim 5
Dependent Claim
174 words
An aspirating hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at one outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston, the syringe including means defining longitudinal slots in an outer end portion of said piston rod, said actuating means including radial members extending through said slots.
Claim 6
Dependent Claim
174 words
An aspirating hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at one outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston, the syringe including means defining longitudinal slots in an outer end portion of said piston rod, said actuating means including radial members extending through said slots.
Claim 7
Dependent Claim
49 words
The syringe of claim 4 including opposed pressure plate means at the outer ends of said piston rod and said aspiration rod respectfully and spring means interposed between said pressure plate means, said spring means urging said aspiration rod inwardly of said cylindrical member relative to said piston rod.
Claim 8
Dependent Claim
219 words
As aspirating hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at one outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston, the syringe including a pressure plate at the outer end of said aspiration rod, means defining an inclined surface at the outer end of said piston rod, and an actuating member between said piston rod and said pressure plate, said actuating member having a further inclined surface conforming to said inclined surface on said piston rod for moving said aspiration rod outwardly relative to said piston rod within a wedge-like action.
Claim 9
Dependent Claim
219 words
As aspirating hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at one outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston, the syringe including a pressure plate at the outer end of said aspiration rod, means defining an inclined surface at the outer end of said piston rod, and an actuating member between said piston rod and said pressure plate, said actuating member having a further inclined surface conforming to said inclined surface on said piston rod for moving said aspiration rod outwardly relative to said piston rod within a wedge-like action.
Claim 10
Dependent Claim
22 words
The syringe of claim 6 wherein said actuating member includes means defining a through-hole receiving the outer end of said aspiration rod.
Claim 11
Dependent Claim
226 words
An aspirating hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at one outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston wherein said actuating means includes a pressure plate means at the outer end of said actuating rod and a rocking member interposed between said pressure plate means and the outer end of said piston rod for moving said aspiration rod outwardly relative to said piston rod by a camming action, said rocking member including a ring portion encircling a part of said aspiration rod adjacent said pressure plate means and a lever portion connected to said ring portion.
Claim 12
Dependent Claim
226 words
An aspirating hypodermic syringe comprising a cylindrical member, a piston and an aspirating member contained within said cylindrical member, a piston rod and an aspiration rod for operating said piston and said aspirating member respectively, said aspiration rod being contained within said piston rod and said piston rod and aspiration rod extending from one end of said cylindrical member, said piston and aspirating member being arranged for limited relative axial movement, said aspirating member having an inner limit of axial movement relative to said piston and an outer limit of axial movement relative to said piston and actuating means at one outer end of said aspiration rod for manually outwardly displacing said aspiration rod relative to said piston rod when said aspirating member is at its inner limit of axial movement relative to said piston to provide an aspirating movement of said aspirating member relative to said piston wherein said actuating means includes a pressure plate means at the outer end of said actuating rod and a rocking member interposed between said pressure plate means and the outer end of said piston rod for moving said aspiration rod outwardly relative to said piston rod by a camming action, said rocking member including a ring portion encircling a part of said aspiration rod adjacent said pressure plate means and a lever portion connected to said ring portion.
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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |