Patent US3390050A successfully refreshed from Google Patents.
US3770026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for accurately loading syringes
Assignee: Individual
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Filing: 1971-09-17
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Granted: 1973-11-06
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Expires: 1991-09-17
Abstract
Abstract A gage set is provided for loading various types of conventional hypodermic syringes. The gages comprise, in a first embodiment, a member having opposed parallel faces displaced from one another by a perpendicular edge having a notch formed therein which is sized to receive the plunger shaft of the syringe. This member may be formed as a single unit or of a number of smaller units which are fastened together to create the desired displacement. To load a syringe using the first embodiment the plunger is gradually withdrawn by pushing with the member until the member slips over the plunger shaft and then the plunger is pushed in until the member is trapped between and engages the barrel flange and the plunger disk. In a second embodiment the gage comprises a hollow member having a closed end and an open end defined by a lip to be parallel to the closed end, said open end being adapted to receive the plunger disk but not the barrel flange of the syringe. In the use of the second embodiment, the open end is slipped over the plunger disk which is in an extended position following the filling of the syringe with an approximate amount of medicine. Then the member is pressed until the lip engages the barrel flange. In a third embodiment the gage is composed of a member similar to the first embodiment but with a gap or notch essentially parallel to the opposed parallel faces to receive the plunger disk thus requiring minimal manual dexterity to use. The gage in any embodiment may contain indicia of the make and model of syringe with which it should only be used, the amount of medication which it will load, and further may be color coded for type of medication.
Inventors
- 👤 J Isenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31525; A61M5/31565; A61M5/3159; A61M5/31591; A61M5/31576; A61M5/31578; A61M5/3158
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
228 words
A gage for use in loading a predetermined volume of medication into a disposable hypodermic syringe of the type including a plunger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft and a barrel having a fixed surface which faces toward the forward face of said head, said gage comprising a member having a forward end surface and having a longitudinal dimension and a transverse dimension, said member having opposite side surfaces of substantial area facing transversely of the longitudinal dimension of the member to thereby provide a handle to be gripped by the fingers of the person using said gage, said member also having two parallel stop surfaces lying in said transverse dimension and arranged in spaced apart relationship along said longitudinal dimension of said member, one of said stop surfaces forming a portion of said forward end surface of said members, so that when said member is disposed in its operative position with its longitudinal dimension parallel to the plunger of a syringe said one stop surface is engageable with the fixed surface on the syringe barrel and the other stop surface is engageable with one of the end surfaces of the plunger head, the distance between said stop surfaces when so engaged determining the longitudinal position of the plunger within the barrel.
Claim 2
Dependent Claim
228 words
A gage for use in loading a predetermined volume of medication into a disposable hypodermic syringe of the type including a plunger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft and a barrel having a fixed surface which faces toward the forward face of said head, said gage comprising a member having a forward end surface and having a longitudinal dimension and a transverse dimension, said member having opposite side surfaces of substantial area facing transversely of the longitudinal dimension of the member to thereby provide a handle to be gripped by the fingers of the person using said gage, said member also having two parallel stop surfaces lying in said transverse dimension and arranged in spaced apart relationship along said longitudinal dimension of said member, one of said stop surfaces forming a portion of said forward end surface of said members, so that when said member is disposed in its operative position with its longitudinal dimension parallel to the plunger of a syringe said one stop surface is engageable with the fixed surface on the syringe barrel and the other stop surface is engageable with one of the end surfaces of the plunger head, the distance between said stop surfaces when so engaged determining the longitudinal position of the plunger within the barrel.
Claim 3
Dependent Claim
228 words
A gage for use in loading a predetermined volume of medication into a disposable hypodermic syringe of the type including a pluNger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft and a barrel having a fixed surface which faces toward the forward face of said head, said gage comprising a member having a longitudinal dimension and a transverse dimension, said member having opposite side surfaces of substantial area facing transversely of the longitudinal dimension of the member to thereby provide a handle to be gripped by the fingers of the person using said gage, said member also having two parallel stop surfaces lying in said transverse dimension and arranged in spaced apart relationship along said longitudinal dimension of said member, said member having a cavity extending longitudinally of said member between said stop surfaces for receiving the plunger of the syringe, so that when said member is disposed in its operative position with its longitudinal dimension parallel to the plunger of a syringe one of said stop surfaces is engageable with the fixed surface on the syringe barrel and the other stop surface is engageable with one of the end surfaces of the plunger head, the distance between said stop surfaces when so engaged determining the longitudinal position of the plunger within the barrel.
Claim 4
Dependent Claim
228 words
A gage for use in loading a predetermined volume of medication into a disposable hypodermic syringe of the type including a pluNger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft and a barrel having a fixed surface which faces toward the forward face of said head, said gage comprising a member having a longitudinal dimension and a transverse dimension, said member having opposite side surfaces of substantial area facing transversely of the longitudinal dimension of the member to thereby provide a handle to be gripped by the fingers of the person using said gage, said member also having two parallel stop surfaces lying in said transverse dimension and arranged in spaced apart relationship along said longitudinal dimension of said member, said member having a cavity extending longitudinally of said member between said stop surfaces for receiving the plunger of the syringe, so that when said member is disposed in its operative position with its longitudinal dimension parallel to the plunger of a syringe one of said stop surfaces is engageable with the fixed surface on the syringe barrel and the other stop surface is engageable with one of the end surfaces of the plunger head, the distance between said stop surfaces when so engaged determining the longitudinal position of the plunger within the barrel.
Claim 5
Dependent Claim
60 words
A gage as in claim 2 wherein said cavity is a bore within said member, said bore having an open end adjacent said one stop surface, the other end of said bore defining said other stop surface whereby in the operative position of said gage said other stop surface is engageable with the rear end surface of the plunger head.
Claim 6
Dependent Claim
21 words
A gage as in claim 2 wherein said cavity is a groove extending longitudinally of said member between said stop surfaces.
Claim 7
Dependent Claim
70 words
A gage as in claim 2 wherein said member has a slot lying in a plane which is transverse to the longitudinal dimension of said member, said slot having end walls which are engageable with the forward and rear surfaces of the plunger head when said member is in its operative position, said cavity in said member being a longitudinally extending groove which communicates at one end of said slot.
Claim 8
Dependent Claim
32 words
A gage as in claim 5 wherein said member is made up of a plurality of similarly shaped units disposed end-to-end engagement and further including means for releasably holding said units together.
Claim 9
Dependent Claim
236 words
In combination with a disposable hypodermic syringe of the type including a plunger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft and a barrel having a fixd surface which faces axially toward the forward face of said head, a gage for use in loading a predetermined volume of medication into said syringe, said gage having a forward end surface and having a longitudinal dimension and a transverse dimension and comprising a member having opposite side surfaces of substantial area facing transversely of said longitudinal dimension to thereby provide a handle to be gripped by the person using said gage, said member also having two parallel stop surfaces lying in said transverse dimension, one of said stop surfaces forming a portion of said forward end surface of said gage, said stop surfaces being so arranged in spaced apart relationship along said longitudinal dimension that, when said gage is disposed in its operative position with its longitudinal dimension parallel to said syringe plunger, that said one stop surface is engageable with said fixed surface on said syringe barrel and the other stop surface is engageable with one of said end surfaces of said plunger head, the distance between said stop surfaces determining the longitudinal position of said plunger within said barrel and hence determining the volume of medication to be dispensed from said barrel.
Claim 10
Dependent Claim
236 words
In combination with a disposable hypodermic syringe of the type including a plunger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft and a barrel having a fixd surface which faces axially toward the forward face of said head, a gage for use in loading a predetermined volume of medication into said syringe, said gage having a forward end surface and having a longitudinal dimension and a transverse dimension and comprising a member having opposite side surfaces of substantial area facing transversely of said longitudinal dimension to thereby provide a handle to be gripped by the person using said gage, said member also having two parallel stop surfaces lying in said transverse dimension, one of said stop surfaces forming a portion of said forward end surface of said gage, said stop surfaces being so arranged in spaced apart relationship along said longitudinal dimension that, when said gage is disposed in its operative position with its longitudinal dimension parallel to said syringe plunger, that said one stop surface is engageable with said fixed surface on said syringe barrel and the other stop surface is engageable with one of said end surfaces of said plunger head, the distance between said stop surfaces determining the longitudinal position of said plunger within said barrel and hence determining the volume of medication to be dispensed from said barrel.
Claim 11
Dependent Claim
38 words
The combination of claim 7 wherein said member has a cavity extending along the longitudinal dimension of said member between said stop members, said syringe plunger residing in said cavity when said gage is in its operative position.
Claim 12
Independent Claim
241 words
A method of loadIng a predetermined volume of medication into any one of a plurality of mass produced dimensionally identical disposable hypodermic syringes of the type including a plunger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft, a barrel having a fixed surface which faces toward said forward face of said head, and a needle affixed to one end of the barrel, said method comprising: inserting said needle into a source of medication and partially withdrawing said plunger shaft from said barrel to draw medication into said barrel through said needle; manually holding a gage adjacent said plunger shaft, said gage having a forward end surface which can be abutted with said fixed surface on said syringe barrel and having a rear stop surface which can be abutted with one of said end surfaces of said plunger head, the distance between said forward end surface and said rear stop surface having been independently determined for the type of syringe being loaded; moving said plunger shaft into said barrel to a position in which said one end surface of said plunger head abuts said stop surface and in which said forward end surface of the gage abuts said fixed surface on said syringe barrel; and removing the gage whereby the resulting position of said plunger shaft relative to said barrel determines the volume of medication in said barrel.
Claim 13
Independent Claim
241 words
A method of loadIng a predetermined volume of medication into any one of a plurality of mass produced dimensionally identical disposable hypodermic syringes of the type including a plunger shaft terminating at its outer end in an enlarged head having forward and rear end surfaces which face axially of the shaft, a barrel having a fixed surface which faces toward said forward face of said head, and a needle affixed to one end of the barrel, said method comprising: inserting said needle into a source of medication and partially withdrawing said plunger shaft from said barrel to draw medication into said barrel through said needle; manually holding a gage adjacent said plunger shaft, said gage having a forward end surface which can be abutted with said fixed surface on said syringe barrel and having a rear stop surface which can be abutted with one of said end surfaces of said plunger head, the distance between said forward end surface and said rear stop surface having been independently determined for the type of syringe being loaded; moving said plunger shaft into said barrel to a position in which said one end surface of said plunger head abuts said stop surface and in which said forward end surface of the gage abuts said fixed surface on said syringe barrel; and removing the gage whereby the resulting position of said plunger shaft relative to said barrel determines the volume of medication in said barrel.
Claim 14
Dependent Claim
97 words
A method as in claim 9 wherein a predetermined volume of a second medication is loaded into the syringe after removing said gage by inserting the needle into a supply of the second medication, abutting one end of a second gage of greater length than the first-mentioned gage with the forward end surface of the plunger head pressing said second gage against said forward end surface to withdraw said plunger shaft further from said syringe barrel and continuing the withdrawal until said second gage just fits between said plunger head and said fixed surface on said barrel.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |