US3872864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double syringe
Assignee: Individual
•
Filing: 1973-07-06
•
Granted: 1975-03-25
•
Expires: 1993-07-06
Abstract
Abstract A double syringe assembly is disclosed which comprises an outer housing enclosing an inner housing. The two housings define an outer reservoir between them and an inner reservoir inside the inner housing. There are three ports in the outer housing and one port in the inner housing. Further, there are corresponding sealing beads on the outer surface of the inner housing for covering and uncovering two of the outer-housing ports and a sealing bead on the inner surface of the outer housing for covering and uncovering the inner-housing port. A separate plug is provided for covering and uncovering the third outer-housing port. The inner housing has a needle mounting tube extending from an end thereof which is inserted through an opening in the end of the outer housing. The needle mounting tube has a bead formed on the outer surface thereof which prevents axial movement between the two housings, but allows rotational movement. A protruding annularly-shaped sealing ring is formed on the inner surface of the outer-syringe, encircling the opening. Further, an annularlyshaped slot is formed about the base of the needle mounting tube on the outer surface of the inner syringe for receiving the sealing ring. Thus a seal is formed to hold diluent in the outer reservoir. In addition, a similar arrangement of sealing elements is provided at the opposite end of the syringe assembly.
Inventors
- 👤 Jr Robert E Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31596
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
452 words
A syringe comprising: a cylindrically-shaped hollow outer housing having a relatively large opening at a first end thereof, a smaller opening at a second end thereof and at least one port in a sidewall thereof, said at least one port being located closer to said outercylinder first end than to said outer-cylinder second end, said cylindrically-shaped hollow outer housing including a first sealing means encircling said large opening and a second sealing means encircling said smaller opening; a cylindrically-shaped hollow inner housing having an outer diameter less than the outer-housing inner diameter inserted in said outer-housing through said large opening, said inner housing having a relatively large opening at a first end thereof, a smaller opening at a second end thereof, and a port in a sidewall thereof, said port being located closer to said inner-housing second end than than to said inner-housing first end, said cylindrically-shaped hollow inner housing including a first sealing means encircling said large opening for engaging said first sealing means of said outer housing and a second sealing means encircling said smaller opening for engaging said second sealing means of said outer housing, said inner-housing defining an inner reservoir in the interior thereof; a plunger inserted into said inner reservoir of said inner housing through said large opening, said plunger including a tip thereon for engaging the inner surface of said inner housing, and thereby preventing fluid flow in said inner reservoir past said tip; a mounting means holding said inner housing tightly inside said outer housing with said respective large and small openings of said inner and outer housings being adjacent one another, said inner and outer housings forming an outer reservoir therebetween, said mounting means allowing relative rotation between said inner anD outer housings, but yet providing sufficient axial restraint to hold said first sealing means of said outer housing in tight engagement with said first sealing means of said inner housing, thereby preventing fluid leakage from an outer-reservoir first end, and said second sealing means of said outer housing in tight engagement with said second sealing means of said inner housing, thereby preventing fluid leakage from an outer-reservoir second end; wherein, a first bead means is included on an inner surface of said outer housing for covering and uncovering said port in said inner housing in response to relative rotation between said inner and outer housings, a second bead means is included on an outer surface of said inner housing for covering and uncovering said at least one port in said outer housing in response to relative rotation of said inner and outer housings and said bead means are angularly positioned relative to one another so that they simultaneously cover and uncover said ports.
Claim 2
Dependent Claim
452 words
A syringe comprising: a cylindrically-shaped hollow outer housing having a relatively large opening at a first end thereof, a smaller opening at a second end thereof and at least one port in a sidewall thereof, said at least one port being located closer to said outercylinder first end than to said outer-cylinder second end, said cylindrically-shaped hollow outer housing including a first sealing means encircling said large opening and a second sealing means encircling said smaller opening; a cylindrically-shaped hollow inner housing having an outer diameter less than the outer-housing inner diameter inserted in said outer-housing through said large opening, said inner housing having a relatively large opening at a first end thereof, a smaller opening at a second end thereof, and a port in a sidewall thereof, said port being located closer to said inner-housing second end than than to said inner-housing first end, said cylindrically-shaped hollow inner housing including a first sealing means encircling said large opening for engaging said first sealing means of said outer housing and a second sealing means encircling said smaller opening for engaging said second sealing means of said outer housing, said inner-housing defining an inner reservoir in the interior thereof; a plunger inserted into said inner reservoir of said inner housing through said large opening, said plunger including a tip thereon for engaging the inner surface of said inner housing, and thereby preventing fluid flow in said inner reservoir past said tip; a mounting means holding said inner housing tightly inside said outer housing with said respective large and small openings of said inner and outer housings being adjacent one another, said inner and outer housings forming an outer reservoir therebetween, said mounting means allowing relative rotation between said inner anD outer housings, but yet providing sufficient axial restraint to hold said first sealing means of said outer housing in tight engagement with said first sealing means of said inner housing, thereby preventing fluid leakage from an outer-reservoir first end, and said second sealing means of said outer housing in tight engagement with said second sealing means of said inner housing, thereby preventing fluid leakage from an outer-reservoir second end; wherein, a first bead means is included on an inner surface of said outer housing for covering and uncovering said port in said inner housing in response to relative rotation between said inner and outer housings, a second bead means is included on an outer surface of said inner housing for covering and uncovering said at least one port in said outer housing in response to relative rotation of said inner and outer housings and said bead means are angularly positioned relative to one another so that they simultaneously cover and uncover said ports.
Claim 3
Dependent Claim
61 words
A syringe as claimed in claim 1 wherein said cylindrically-shaped hollow outer housing includes a second port in a sidewall thereof, said second port being located closer to said outer-housing first end then to said outer-housing second end, and wherein is further included a plug for insertion into said second outer-housing port for selectively covering and uncovering said second outer-housing port.
Claim 4
Dependent Claim
147 words
A syringe as claimed in claim 1 wherein said mounting means comprises a needle-mounting tube which is integral with said inner housing and which protrudes longitudinally outwardly at said second end of said inner housing, with an interior passage thereof forming said smaller opening in said inner housing, said needle-mounting tube being of such a size and shape to fit through said smaller opening in said outer housing, said needle-mounting tube including a bead protruding from the outer surface thereof which is of such size and shape, and is so positioned that it retains the inner and outer housings against axial movement so that said respective first sealing means of said inner and outer housings and said respective second sealing means of said inner and outer housings are maintained in close contact with one another but yet relative rotation is allowed between said inner and outer housings.
Claim 5
Dependent Claim
40 words
A syringe as claimed in claim 3 wherein said bead protruding from the outer surface of said needle-mounting tube is of such a size and shape that it may be force ''''popped'''' through said smaller opening in said outer housing.
Claim 6
Dependent Claim
60 words
A syringe as claimed in claim 3 wherein said cylindrically-shaped hollow outer housing includes a second port in a sidewall thereof, said second port being located closer to said outer-housing first end than to said outer-housing second end, and is further included a plug for insertion into said second outer-housing port for selectively covering and uncovering said second outer-housing port.
Claim 7
Dependent Claim
136 words
A syringe as claimed in claim 3 where: said outer-housing first sealing means comprises an annularly shaped sealing groove which faces axially in the direction of said first end and said inner housing first sealing means comprises a flange and a annularly shaped sealing ring protruding from a bottom surface of said flange in an axial direction toward said second end, said sealing ring being constructed of such a size and shape as to fit into said outer-housing sealing groove; and said inner housing second sealing means comprises an annularly shaped sealing groove axially facing said second end and said outer housing second sealing means is a sealing ring protruding from the inner surface thereof axially toward its first end, and being of such a size and shape as to fit into said inner-housing sealing groove.
Claim 8
Dependent Claim
52 words
A syringe as claimed in claim 1 wherein a post is integral with said outer housing and is located along the inner surface thereof, said post being of such a size, and being positioned, so as to limit relative rotation between thE outer and inner housings by engaging one of said beads.
Claim 9
Dependent Claim
67 words
A syringe as claimed in claim 1 wherein is further included a needle mounting tube integral with said inner housing which protrudes longitudinally outwardly at said second end of said inner housing, with an interior passage thereof forming said smaller opening in said inner housing, said needle mounting tube being of such a size and shape to fit snugly through said smaller opening in said outer housing.
Claim 10
Dependent Claim
28 words
A syringe as claimed in claim 1 wherein said plunger tip includes at least three axially separated sealing members for engaging the inner surface of said inner housing.
Claim 11
Dependent Claim
403 words
In a syringe comprising: a cylindrically shaped hollow outer housing having a relatively large opening at a first end thereof, and a smaller opening at a second end thereof, said cylindrically shaped hollow outer housing including a first sealing means encircling said large opening at a first end thereof, and a smaller opening at a second end thereof; and a cylindrically shaped hollow inner housing, having an outer diameter less than the outer-housing inner diameter, inserted into said outer-housing through said large opening, said inner housing having a relatively large opening at a first end thereof and a smaller opening at a second end thereof, said inner housing including a first sealing means encircling said large opening for engaging said first sealing means of said outer housing and a second sealing means encircling said smaller opening for engaging said second sealing means of said outer housing, said inner-housing defining an inner reservoir in the interior thereof, said inner housing including a needle mounting tube protruding outwardly at said second end which forms said smaller opening in said inner housing; means to hold said inner and outer housings in such relative axial positions that their respective first sealing means are in engagement and their respective second sealing means are in engagement to form an outer reservoir between said inner and outer housings, but yet to allow rotational movement between said inner and outer housings and said inner and outer housings including means for opening and closing a passage between said inner and outer reservoirs in response to rotational movement between said inner and outer housings; and a plunger inserted into said inner reservoir of said inner housing through said inner-housing large opening, said plunger including a tip thereon for engaging the inner surface of said inner housing, thereby preventing fluid flow in said inner cylinder past said tip; the improvement wherein said needle-mounting tube is adapted to both have a hypodermic needle mounted on a tip thereof and to form said holding means by being of such a size and shape as to fit snugly through said smaller opening in said outer housing, said needle-mounting tube having a bead on the outer surface thereof which is of such a size, shape and location as to remain in contact with the outer surface of said outer housing around said smaller opening to thereby hold said inner and outer housings in said sealed, rotatable axial positions.
Claim 12
Dependent Claim
403 words
In a syringe comprising: a cylindrically shaped hollow outer housing having a relatively large opening at a first end thereof, and a smaller opening at a second end thereof, said cylindrically shaped hollow outer housing including a first sealing means encircling said large opening at a first end thereof, and a smaller opening at a second end thereof; and a cylindrically shaped hollow inner housing, having an outer diameter less than the outer-housing inner diameter, inserted into said outer-housing through said large opening, said inner housing having a relatively large opening at a first end thereof and a smaller opening at a second end thereof, said inner housing including a first sealing means encircling said large opening for engaging said first sealing means of said outer housing and a second sealing means encircling said smaller opening for engaging said second sealing means of said outer housing, said inner-housing defining an inner reservoir in the interior thereof, said inner housing including a needle mounting tube protruding outwardly at said second end which forms said smaller opening in said inner housing; means to hold said inner and outer housings in such relative axial positions that their respective first sealing means are in engagement and their respective second sealing means are in engagement to form an outer reservoir between said inner and outer housings, but yet to allow rotational movement between said inner and outer housings and said inner and outer housings including means for opening and closing a passage between said inner and outer reservoirs in response to rotational movement between said inner and outer housings; and a plunger inserted into said inner reservoir of said inner housing through said inner-housing large opening, said plunger including a tip thereon for engaging the inner surface of said inner housing, thereby preventing fluid flow in said inner cylinder past said tip; the improvement wherein said needle-mounting tube is adapted to both have a hypodermic needle mounted on a tip thereof and to form said holding means by being of such a size and shape as to fit snugly through said smaller opening in said outer housing, said needle-mounting tube having a bead on the outer surface thereof which is of such a size, shape and location as to remain in contact with the outer surface of said outer housing around said smaller opening to thereby hold said inner and outer housings in said sealed, rotatable axial positions.
References Cited (Backward Citations)
US553234A
Cited
US1127201A
Cited
US1950137A
Cited
US3348546A
Cited
US3255752A
Cited
US3511239A
Cited
US3678930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |