US3901653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid sampling device
Assignee: Rosemount Inc
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Filing: 1973-07-19
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Granted: 1975-08-26
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Expires: 1993-07-19
Abstract
Abstract A device for dispensing a predetermined quantity of a liquid sample has an S-shaped dosing tube with an inlet connected through a collecting vessel to an air supply for receiving air during vacuum, vent and pressure portions of an operation cycle and an outlet connected to deliver the sample to a recipient system. A supply tube connected to receive liquid from a source such as a process stream provides liquid to the dosing tube, during the vacuum portion of the cycle, through a transfer vessel operatively connected between the inlet and outlet. Liquid enters the transfer vessel from the supply tube at a level above that of liquid remaining in the dosing tube from a previous operation cycle. A drain tube is connected through the collecting vessel to the dosing tube to remove liquid in excess of the predetermined quantity prior to dispensing the sample. A liquid seal is provided in the tubes to prevent air escape and maintain pressure in the tubes. The device is especially adaptable to deliver a fresh sample for each operation cycle which is not mixed with liquid remaining in the device from a previous sample. Each cycle of operation is controlled by a programmer which provides signals to the air supply and the supply tube during vacuum, vent and pressure portions of each operation cycle.
Inventors
- 👤 Robert H Jones
- 👤 Charles V Hummel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:21
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
132 words
A device for dispensing a predetermined quantity of a liquid sample to a recipient system comprising: a dosing tube including an inlet orifice, a discharge orifice, a dosing vessel, and a transfer vessel operatively connected between the inlet orifice and the discharge orifice; a coLlecting vessel operatively connected to the inlet orifice at a level below the level of the discharge orifice and above the top of the transfer vessel, a source of liquid; supply means operatively connected to said liquid source for passing a predetermined amount of liquid from said source to the transfer vessel; drain means communicating with the lower portion of said collecting vessel for emptying said collecting vessel; and means for selectively providing air under vacuum, atmosphere, and pressure to said collecting vessel during each cycle of operation.
Claim 2
Independent Claim
132 words
A device for dispensing a predetermined quantity of a liquid sample to a recipient system comprising: a dosing tube including an inlet orifice, a discharge orifice, a dosing vessel, and a transfer vessel operatively connected between the inlet orifice and the discharge orifice; a coLlecting vessel operatively connected to the inlet orifice at a level below the level of the discharge orifice and above the top of the transfer vessel, a source of liquid; supply means operatively connected to said liquid source for passing a predetermined amount of liquid from said source to the transfer vessel; drain means communicating with the lower portion of said collecting vessel for emptying said collecting vessel; and means for selectively providing air under vacuum, atmosphere, and pressure to said collecting vessel during each cycle of operation.
Claim 3
Dependent Claim
78 words
A dispensing device as set forth in claim 1 wherein said supply means includes a supply tube having an inlet operatively connected to receive liquid from said source in a continuous flow, an outlet operatively connected to discharge liquid in a continuous flow at a level above the level of the transfer vessel, and feed conduit means communicating with the supply tube and the transfer vessel for selectively passing liquid from the supply tube to the transfer vessel.
Claim 4
Dependent Claim
39 words
A dispensing device as set forth in claim 2 wherein there is included a pump connected to the supply tube inlet and responsive to said source of liquid to provide a continuous flow of liquid to the supply tube.
Claim 5
Dependent Claim
57 words
A dispensing device as set forth in claim 3 wherein said feed conduit means includes a conduit having an inlet communicating with the supply tube and an outlet communicating with the transfer vessel, and a valve below the inlet and outlet operatively connected to alternately block and pass liquid from the supply tube to the transfer vessel.
Claim 6
Dependent Claim
45 words
A dispensing device as set forth in claim 4 wherein is included programming means operatively connected to open and close said valve according to predetermined time intervals whereby liquid flows from said supply tube to said transfer vessel according to signals from said programming means.
Claim 7
Dependent Claim
50 words
A dispensing device as set forth in claim 5 wherein said programming means is operatively connected to said means for providing air to cause air under vacuum to be provided to said collecting vessel when said valve is opened to pass liquid from the supply tube to the transfer vessel.
Claim 8
Dependent Claim
77 words
A dispensing device as set forth in claim 6 wherein said programming means is operatively connected to said means for providing air to cause air under vacuum to be provided to said collecting vessel shortly before said valve is opened to pass liquid from the supply tube to the transfer vessel whereby liquid remaining in said dosing tube is withdrawn from the transfer vessel ahead of liquid being passed from the supply tube to the transfer vessel.
Claim 9
Dependent Claim
39 words
A dispensing device as set forth in claim 7 wherein said programming means is operatively connected to said means for providing air to cause air under vent to be provided to said collecting vessel when said valve is closed.
Claim 10
Dependent Claim
57 words
A dispensing device as set forth in claim 8 wherein said programming means is operatively connected to said means for providing air under pressure to be provided to said collecting vessel after air under vent is provided to said collecting vessel whereby liquid is said dosing tube is dispensed through the discharge orifice to said recipient system.
Claim 11
Dependent Claim
90 words
A dispensing device as set forth in claim 1 wherein said drain means includes a drain tube having an inlet connected to the lower portion of said collecting vessel, a lower bight, a downwardly extending leg connecting the inlet and the lower bight, a discharge orifice, an upwardly extending leg connecting the lower bight and the discharge orifice, and a reservoir vessel operatively connected in said upwardly extending leg between the lower bight and said discharge orifice, the level of the discharge orifice being below the level of the inlet.
Claim 12
Dependent Claim
39 words
A dispensing device as set forth in claim 10 wherein the liquid in the reservoir vessel of said drain tube is operatively connected to supply liquid to said collecting vessel during the vacuum portion of a cycle of operation.
Claim 13
Dependent Claim
86 words
A dispensing device as set forth in claim 1 wherein said supply means includes a supply tube having first and second vertically extending legs, an upper bight operatively connected between the legs, a container for liquid to be sampled having the first leg submerged therein, and feed conduit means operatively connected between the second leg and the transfer vessel, the level of liquid in the container being above the level of said feed conduit means whereby liquid is siphoned from said container to said transfer vessel.
Claim 14
Dependent Claim
44 words
A dispensing device as set forth in claim 1 wherein said supply means is connected to the transfer vessel to pass liquid from said source to the transfer vessel on top of liquid remaining in said dosing tube from a previous cycle of operation.
Claim 15
Dependent Claim
98 words
A dispensing device as set forth in claim 1 wherein said supply means includes a supply tube having in inlet operatively connected to receive liquid from a source in a continuous flow, a container, an outlet opening connected to discharge liquid to said container, feed conduit means communicating with the supply tube and the transfer vessel for selectively passing liquid from the supply tube to the transfer vessel, and a valve operatively connected in said supply tube and responsive to a signal to close the flow of liquid in said supply tube at a predetermined volume of flow.
Claim 16
Dependent Claim
42 words
A dispensing device as set forth in claim 1 wherein said drain means is operatively connected to said collecting vessel to provide flow of liquid from said collecting vessel through said drain means during the pressure portion of a cycle of operation.
Claim 17
Dependent Claim
22 words
A dispensing device as set forth in claim 1 wherein the lower portion of said collecting vessel is below said inlet orifice.
Claim 18
Dependent Claim
29 words
A dispensing device as set forth in claim 1 wherein said means for selectively providing air comprises a pump operatively connected to provide air under pressure, vacuum, or atmosphere.
Claim 19
Dependent Claim
30 words
A dispensing device as set forth in claim 16 wherein there is included means for regulating the amount of pressure and vacuum produced by said means for selectively providing air.
Claim 20
Independent Claim
128 words
A METHOD OF DISPENSING A PREDETERMINED QUANTITY OF A LIQU SAMPLE TO A RECIPIENT SYSTEM HAVING A DOSING TUBE, A SUPPLY TUBE, AND A DRAIN TUBE, INCLUDING THE STEPS OF: SUPPLYING AIR UNDER VACUUM, ATMOSPHERE AND PRESSURE TO SAID DOSING TUBE DURING CORRESPONDING VACUUM, VENT, AND PRESSURE PORTIONS OF AN OERATION CYCLE, PASSING A LIQUID SAMPLE FROM A SOURCE THROUGH SAID SUPPLY TUBE TO SAID DOSING TUBE DURING THE VACUUM PORTION OF A CYCLE OF OPERATION, BLOCKING THE FLOW OF SAID LIQUID SAMPLE FROM SAID SUPPLY TUBE TO SAID DOSING TUBE DURING THE VENT AND PRESSURE PORTIONS OF A CYCLE OF OPERATION, REMOVING LIQUID FROM SAID DOSING TUBE IN EXCESS OF A PREDETERMINED QUANTITY THROUGH SAID DRAIN TUBE DURING THE VENT PORTION OF A CYCLE OF OPERATION, AND
Claim 21
Independent Claim
128 words
A METHOD OF DISPENSING A PREDETERMINED QUANTITY OF A LIQU SAMPLE TO A RECIPIENT SYSTEM HAVING A DOSING TUBE, A SUPPLY TUBE, AND A DRAIN TUBE, INCLUDING THE STEPS OF: SUPPLYING AIR UNDER VACUUM, ATMOSPHERE AND PRESSURE TO SAID DOSING TUBE DURING CORRESPONDING VACUUM, VENT, AND PRESSURE PORTIONS OF AN OERATION CYCLE, PASSING A LIQUID SAMPLE FROM A SOURCE THROUGH SAID SUPPLY TUBE TO SAID DOSING TUBE DURING THE VACUUM PORTION OF A CYCLE OF OPERATION, BLOCKING THE FLOW OF SAID LIQUID SAMPLE FROM SAID SUPPLY TUBE TO SAID DOSING TUBE DURING THE VENT AND PRESSURE PORTIONS OF A CYCLE OF OPERATION, REMOVING LIQUID FROM SAID DOSING TUBE IN EXCESS OF A PREDETERMINED QUANTITY THROUGH SAID DRAIN TUBE DURING THE VENT PORTION OF A CYCLE OF OPERATION, AND
Claim 22
Dependent Claim
61 words
A method according to claim 19 in which liquid is passed to said dosing tube shortly after the beginning of the vacuum portion of a cycle of operation whereby liquid remaining in the dosing tube from a previous cycle of operation is removed through said drain tube ahead of the liquid entering said dosing tube during the following cycle of operation.
Claim 23
Dependent Claim
35 words
A method according to claim 19 wherein said liquid sample is passed from said supply tube to said dosing tube according to predetermined quantities based upon a total amount of liquid flowing in a stream.
Claim 24
Dependent Claim
40 words
A method according to claim 19 wherein said liquid sample is passed from said supply tube to said dosing tube according to predetermined quantities based upon the amount of liquid flowing in a stream for a given period of time.
Claim 25
Dependent Claim
23 words
A method according to claim 19 wherein the method of claim 19 is repeated with a plurality of recipient systems in serial fashion.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |