US3646960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection and dosing arrangements
Assignee: Pfizer Health AB
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Filing: 1970-03-30
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Granted: 1972-03-07
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Expires: 1990-03-30
Abstract
Abstract An arrangement for injecting a defined volume of a first fluid into a second streaming fluid is provided. The injection is carried out by separating two normally sealed tube sections through which the streaming fluid passes. The fluid to be injected is supplied to a chamber which surrounds the junction of the sections. An overpressure is obtained in the chamber, the overpressure generating an axial force which separates the sections and opens a passage through which the fluid is injected.
Inventors
- 👤 Kjell Esbjorn Jidling
- 👤 Lars O A Soderkvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:31
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; Y; Y10; Y10S; Y10S261/00; Y10S261/75; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/85986; Y10T137/87571
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
Apparatus foR injecting a first fluid into the stream of a second fluid comprising two axially aligned tubes for confining a stream of said second fluid, a chamber having at least one flexible wall, means to position the adjacent ends of said tubes within said chamber and to connect one of the tubes with said flexible wall for axial movement toward and away from the other tube, biasing means to urge the adjacent ends of said tubes into abutting engagement with each other, means to introduce said first fluid into said chamber in contact with said flexible wall under pressure sufficient to overcome said biasing means to move said one tube axially away from the other tube to introduce said first fluid into the stream of said second fluid.
Claim 2
Dependent Claim
129 words
Apparatus foR injecting a first fluid into the stream of a second fluid comprising two axially aligned tubes for confining a stream of said second fluid, a chamber having at least one flexible wall, means to position the adjacent ends of said tubes within said chamber and to connect one of the tubes with said flexible wall for axial movement toward and away from the other tube, biasing means to urge the adjacent ends of said tubes into abutting engagement with each other, means to introduce said first fluid into said chamber in contact with said flexible wall under pressure sufficient to overcome said biasing means to move said one tube axially away from the other tube to introduce said first fluid into the stream of said second fluid.
Claim 3
Dependent Claim
21 words
The invention defined in claim 1, wherein the other of said tubes is stationary, and said biasing means comprises spring means.
Claim 4
Dependent Claim
45 words
The invention defined in claim 2, wherein said flexible wall comprises an annular collar surrounding said one tube and another wall of said chamber is disposed opposite to said collar, the end of the stationary tube being disposed in said another wall of the chamber.
Claim 5
Dependent Claim
85 words
The invention defined in claim 1, wherein said means to introduce said first fluid includes a channel having one end in communication with the interior of said chamber, the other end of said channel being in communication with an opening and means to confine a predetermined amount of said first fluid in said channel and opening, said last means including flexible membrane means disposed across said opening and plunger means movable into engagement with the membrane means to force said first fluid into said chamber.
Claim 6
Dependent Claim
33 words
The invention defined in claim 4, wherein said flexible membrane means is provided with a central aperture, and said aperture is closed by said plunger means when in engagement with the membrane means.
Claim 7
Dependent Claim
52 words
The invention defined in claim 4, wherein said means to introduce said first fluid also includes a second chamber in communication with said channel, and means to vary the volume of said second chamber to vary the pressure and amount of the first fluid introduced into the stream of the second fluid.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |