US3655094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measuring and proportioning fluids
Assignee: Individual
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Filing: 1969-12-29
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Granted: 1972-04-11
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Expires: 1989-12-29
Abstract
Abstract A semi-automatic, motor operated apparatus for measuring and proportioning liquids including a dual diameter shaft acting as a displacement piston to measure precise amounts of a liquid to be diluted and a diluent. A method of accurately measuring a liquid sample and a diluent in which a fluid system is vented to the atmosphere after measured amounts of the sample and diluent have been brought into the system and before they are discharged therefrom.
Inventors
- 👤 James C Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:22
CPC Classifications
F; F04; F04B; F04B5/00; F04B1/00; F04B1/02; F04B7/00; F04B7/0042; F04B7/0046; G; G01; G01N; G01N1/00; G01N1/28; G01N1/38; G01N2001/382
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
156 words
Apparatus to dilute a sample of liquid with a diluent comprising: a. sample measuring means including a sample cylinder, a two diameter piston extending through, and beyond each end of, said cylinder and having the diameter at one end only slightly larger than the diameter at the other end and compensating seals around the ends of the piston and engaging the cylinder, b. diluent measuring means including a diluent cylinder and a piston within said cylinder, c. sample collecting means including a probe communicating with the sample cylinder through a first end and a supply of said sample through a second end, d. diluent collecting means including a multi-port valve having interconnecting ports between said diluent cylinder and a supply of said diluent, e. valve shifting means sequentially to connect said diluent cylinder with said diluent supply, a vent port, and the sample cylinder, and f. piston moving means to reciprocate the pistons in their cylinders.
Claim 2
Dependent Claim
156 words
Apparatus to dilute a sample of liquid with a diluent comprising: a. sample measuring means including a sample cylinder, a two diameter piston extending through, and beyond each end of, said cylinder and having the diameter at one end only slightly larger than the diameter at the other end and compensating seals around the ends of the piston and engaging the cylinder, b. diluent measuring means including a diluent cylinder and a piston within said cylinder, c. sample collecting means including a probe communicating with the sample cylinder through a first end and a supply of said sample through a second end, d. diluent collecting means including a multi-port valve having interconnecting ports between said diluent cylinder and a supply of said diluent, e. valve shifting means sequentially to connect said diluent cylinder with said diluent supply, a vent port, and the sample cylinder, and f. piston moving means to reciprocate the pistons in their cylinders.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 in which the piston moving means is a cam, a first follower engaging said cam to move said pistons in one direction, and a second follower engaging said cam to move the pistons in the opposite direction.
Claim 4
Dependent Claim
13 words
The apparatus of claim 2 in which the cam moves both pistons simultaneously.
Claim 5
Dependent Claim
32 words
The apparatus of claim 1 in which the piston moving means engages separate threaded adjustment means attached to each piston to control the length of movement of each piston in each cylinder.
Claim 6
Dependent Claim
49 words
The apparatus of claim 1 in which the sample cylinder has a first port near one end thereof communicating with the probe, and a second port near the other end communicating with the muli-port valve whereby the diluent expelled from the diluent cylinder is discharged through the sample cylinder.
Claim 7
Dependent Claim
30 words
ThE apparatus of claim 1 in which the vent port is connected to a tube having an outlet end at the same elevation as the second end of the probe.
Claim 8
Independent Claim
137 words
The method of diluting liquids which comprises the steps of connecting a source of diluent to a closed system, said system including a diluent measuring chamber, a liquid sample measuring chamber, and a probe having an open end, filling said system with diluent, connecting the probe to a source of sample liquid, simultaneously enlarging the volume of said chambers and thereby drawing a measured amount of diluent into said diluent chamber and a measured amount of sample liquid into said probe, disconnecting the system from the diluent supply, equalizing the pressure in the system by connecting the diluent measuring chamber to a tube having an outlet at the same elevation as the open end of the probe disconnecting the diluent chamber from said tube, and expelling said measured amounts of diluent and sample liquid through the probe.
Claim 9
Independent Claim
137 words
The method of diluting liquids which comprises the steps of connecting a source of diluent to a closed system, said system including a diluent measuring chamber, a liquid sample measuring chamber, and a probe having an open end, filling said system with diluent, connecting the probe to a source of sample liquid, simultaneously enlarging the volume of said chambers and thereby drawing a measured amount of diluent into said diluent chamber and a measured amount of sample liquid into said probe, disconnecting the system from the diluent supply, equalizing the pressure in the system by connecting the diluent measuring chamber to a tube having an outlet at the same elevation as the open end of the probe disconnecting the diluent chamber from said tube, and expelling said measured amounts of diluent and sample liquid through the probe.
Claim 10
Dependent Claim
26 words
The method of diluting liquids of claim 7 in which the measured amount of diluent flows through the entire system before being expelled through the probe.
References Cited (Backward Citations)
US3339804A
Cited
US3446400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |