US3669358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing and dispensing apparatus
Assignee: Individual
•
Filing: 1970-12-09
•
Granted: 1972-06-13
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Expires: 1990-12-09
Abstract
Abstract A mixing and dispensing apparatus comprises at least one horizontal main cylinder having a row of inlet openings at its top and a row of outlet openings at its bottom. Two pistons are displaceable in the cylinder in such manner that they may either be independently displaced, or simultaneously displaced at a constant distance from each other. At the end of each displacement, only one opening is uncovered. For preparing a dilution series, a separate inlet opening is provided for the liquid to be diluted and the other inlet openings are connected with a feed line for the diluent.
Inventors
- 👤 Jan Waldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:58
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/38; Y; Y10; Y10S; Y10S435/00; Y10S435/975
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
90 words
Apparatus for mixing liquids and for dispensing at least one mixture in a predetermined dose, comprising at least one main Cylinder provided with a plurality of inlet openings for liquids and at least one outlet opening for a mixture, two pistons sealingly enclosed by said main cylinder, and a drive mechanism adapted to displace either of said pistons independently and to displace both pistons simultaneously at a constant distance from each other, in such manner that at most one of said openings is uncovered at the end of each displacement.
Claim 2
Dependent Claim
90 words
Apparatus for mixing liquids and for dispensing at least one mixture in a predetermined dose, comprising at least one main Cylinder provided with a plurality of inlet openings for liquids and at least one outlet opening for a mixture, two pistons sealingly enclosed by said main cylinder, and a drive mechanism adapted to displace either of said pistons independently and to displace both pistons simultaneously at a constant distance from each other, in such manner that at most one of said openings is uncovered at the end of each displacement.
Claim 3
Dependent Claim
49 words
Apparatus as claimed in claim 1, wherein said main cylinder is formed as a horizontal tube with a row of longitudinally spaced inlet openings at its top and a row of correspondingly spaced outlet openings at its bottom, the outlet openings being staggered with respect to the inlet openings.
Claim 4
Dependent Claim
57 words
Apparatus as claimed in claim 2 for producing a series of consecutive dilutions of a given liquid, further comprising a feed line for the diluent, wherein said inlet and outlet openings are equally spaced and said inlet openings are connected with said feed line, while a separate inlet opening is provided for the liquid to be diluted.
Claim 5
Dependent Claim
48 words
Apparatus as claimed in claim 1, wherein each independent displacement of a piston extends through the distance required to admit or to dispense, respectively, a required liquid volume, and each simultaneous displacement of both pistons extends through the distance required to render a subsequent admission or dispensing possible.
Claim 6
Dependent Claim
46 words
Apparatus as claimed in claim 4, wherein all displacements of the pistons are in the same direction, in such manner that independent displacements of one of the pistons serve to admit a liquid, and that independent displacements of the other piston serve to dispense a liquid.
Claim 7
Dependent Claim
39 words
Apparatus as claimed in claim 3, wherein said separate inlet opening for the liquid to be diluted precedes the first inlet opening of said row at a distance corresponding with the distance between subsequent inlet openings of said row.
Claim 8
Dependent Claim
36 words
Apparatus as claimed in claim 3, wherein said separate inlet opening for the liquid to be diluted is arranged between the first and the second inlet opening of said row just past the first outlet opening.
Claim 9
Dependent Claim
34 words
Apparatus as claimed in claim 3, further comprising a plurality of nipples, each applied to one of the inlet and outlet openings sealing said openings and spaced from the interior of said main cylinder.
Claim 10
Dependent Claim
45 words
Apparatus as claimed in claim 8, wherein the cavity of the inlet nipples for the diluent is tapered in such manner that the opening discharging into the main cylinder is at the narrow end, and wherein the cavity of the outlet nipples is substantially cylindrical.
Claim 11
Dependent Claim
20 words
Apparatus as claimed in claim 9, wherein all outlet nipples have the same inner diameter and the same wall thickness.
Claim 12
Dependent Claim
31 words
Apparatus as claimed in claim 8, wherein the inlet nipple for the liquid to be diluted is cylindrical and allows for the passage of the capillary tube of a Pasteur pipette.
Claim 13
Dependent Claim
19 words
Apparatus as claimed in claim 1, wherein said main cylinder is provided with flaring end portions at both ends.
Claim 14
Dependent Claim
17 words
Apparatus as claimed in claim 1, wherein said main cylinder and said pistons are made of glass.
Claim 15
Dependent Claim
26 words
Apparatus as claimed in claim 1, comprising a plurality of main cylinders arranged in parallel, and means for interconnecting corresponding pistons in all said main cylinders.
References Cited (Backward Citations)
US3221948A
Cited
US3285669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |