Patent US3789670A successfully refreshed from Google Patents.
US3789670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cell for collecting and mixing fluids
Assignee: Cities Service Oil Co
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Filing: 1972-08-02
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Granted: 1974-02-05
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Expires: 1992-08-02
Abstract
Abstract Apparatus for collecting a sample of fluids which includes a piston slidable in a cylinder displacable by the sample. A mixing element is provided within the cylinder. The piston and end wall of the cylinder are of such configuration that when the piston and end wall are in contact a small space of the proper size and shape is left to just enclose the mixing element leaving substantially no dead space within the sampling chamber.
Inventors
- 👤 G Rosenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:02
CPC Classifications
B; B01; B01F; B01F31/00; B01F31/44; B01F31/441; B01F33/00; B01F33/45; B01F33/452; G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/20; G01N1/2035; G01N1/2042
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
Sample collecting cell comprising: a. a cylinder leaving plugs fitted in each end, b. one of the plugs having an inward frusto-conical recess which communicates with the interior of the cylinder and is aligned coaxially therewith, an inward hemispherical recess which leads from the small end of the frusto-conical recess of the plug, and a fluid passageway through the body of the plug which extends from the cylinder interior to the outside. c. a free piston coaxially aligned within the cylinder and located between the cylinder plugs, the end of the piston towards the recessed plug having an outward frusto-conical taper at an included angle which matches that of the inward frusto-conical recess of the cylinder plug, the small end of the piston taper having an inward hemispherical recess with the same diameter as the hemispherical recess in the cylinder plug, and d. a ball between the recessed plug and the piston which floatingly fits into the hemispherical recesses of the cylinder plug and the piston.
Claim 2
Dependent Claim
166 words
Sample collecting cell comprising: a. a cylinder leaving plugs fitted in each end, b. one of the plugs having an inward frusto-conical recess which communicates with the interior of the cylinder and is aligned coaxially therewith, an inward hemispherical recess which leads from the small end of the frusto-conical recess of the plug, and a fluid passageway through the body of the plug which extends from the cylinder interior to the outside. c. a free piston coaxially aligned within the cylinder and located between the cylinder plugs, the end of the piston towards the recessed plug having an outward frusto-conical taper at an included angle which matches that of the inward frusto-conical recess of the cylinder plug, the small end of the piston taper having an inward hemispherical recess with the same diameter as the hemispherical recess in the cylinder plug, and d. a ball between the recessed plug and the piston which floatingly fits into the hemispherical recesses of the cylinder plug and the piston.
Claim 3
Dependent Claim
35 words
Apparatus as in claim 1 wherein the other plug at the opposite end of the piston has a fluid passageway through the body of the plug which extends from the cylinder interior to the outside.
Claim 4
Dependent Claim
23 words
Apparatus as in claim 1 and including at least two piston rings which seal between the piston and the wall of the cylinder.
Claim 5
Dependent Claim
10 words
Apparatus as in claim 3 wherein the rings are O-rings.
Claim 6
Dependent Claim
28 words
Apparatus as iN claim 1 wherein the ball is magnetically attracted and including means for moving the ball back and forth within the interior of the cylinder magnetically.
Claim 7
Dependent Claim
25 words
Apparatus as in claim 1 wherein the diameter of the ball is at least about one-fourth as large as the inside diameter of the cylinder.
Claim 8
Dependent Claim
47 words
Apparatus as in claim 2 and further comprising: a. valve means for starting and stopping a flow of pressurized fluid through the passageway of the recessed plug, and b. valve means for starting and stopping a flow of pressurized fluid through the passageway of the other plug.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |