Patent US3812966A successfully refreshed from Google Patents.
US3812966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Settling rate tester
Assignee: Sybron Transition Corp
•
Filing: 1972-03-13
•
Granted: 1974-05-28
•
Expires: 1992-03-13
Abstract
Abstract The settling rate of particulate matter in a fluid is determined by passing a mixture of the fluid and the particulate matter through an inclined tube at a known flow rate within the laminar flow range. Sensors may be used to detect the presence of particles at one or more levels in the tube; and the signals from the sensors may be used to control the operation of a separator.
Inventors
- 👤 W Beach
- 👤 R Schlauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:19
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0039; B01D21/0057; B01D21/0051; B01D21/01; B01D21/02; B01D21/30; B01D21/305
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A method for measuring the settling rate of particulate matter in a fluid comprising: a. providing a vessel containing a mixture of said particulate matter and said fluid; b. providing an inclined tube having a lower end extending into the fluid in the vessel and an upper end extending above the level of the fluid in the vessel; c. sucking fluid from the vessel up through the inclined tube at a known flow rate within the laminar flow range; and d. measuring the distance particulate matter travels up the tube.
Claim 2
Independent Claim
90 words
A method for measuring the settling rate of particulate matter in a fluid comprising: a. providing a vessel containing a mixture of said particulate matter and said fluid; b. providing an inclined tube having a lower end extending into the fluid in the vessel and an upper end extending above the level of the fluid in the vessel; c. sucking fluid from the vessel up through the inclined tube at a known flow rate within the laminar flow range; and d. measuring the distance particulate matter travels up the tube.
Claim 3
Dependent Claim
33 words
A method according to claim 1 wherein the fluid is sucked up through the tube by a positive displacement pump having its inlet hydraulically connected to the upper end of the inclined tube.
Claim 4
Dependent Claim
28 words
A method according to claim 1 wherein the fluid is sucked up through the tube by a syphon hydraulically connected to the upper end of the inclined tube.
Claim 5
Independent Claim
124 words
A method for controlling a separator in which fluid flows through a number of inclined tubes, whereby particulate matter settles out of the fluid in the tubes, comprising: a. providing an inclined control tube located outside the separator; b. withdrawing a mixture of fluid and particulate matter from said separator and passing said mixture through said inclined control tube at a rate that simulates the rate at which fluid passes through the tubes in said separator, whereby said particulate matter settles out of the fluid in said inclined control tube; c. providing means for sensing the presence of particulate matter at at least one level in the inclined control tube; and d. controlling the separator in response to signals produced by said sensing means.
Claim 6
Independent Claim
124 words
A method for controlling a separator in which fluid flows through a number of inclined tubes, whereby particulate matter settles out of the fluid in the tubes, comprising: a. providing an inclined control tube located outside the separator; b. withdrawing a mixture of fluid and particulate matter from said separator and passing said mixture through said inclined control tube at a rate that simulates the rate at which fluid passes through the tubes in said separator, whereby said particulate matter settles out of the fluid in said inclined control tube; c. providing means for sensing the presence of particulate matter at at least one level in the inclined control tube; and d. controlling the separator in response to signals produced by said sensing means.
Claim 7
Dependent Claim
32 words
A method according to claim 4 wherein the flow rate through the inclined control tube is controlled by a syphon tube hydraulically connected to the outlet end of said inclined control tube.
Claim 8
Dependent Claim
33 words
A method according to claim 4 wherein the flow rate through the inclined control tube is controlled by a positive displacement pump hydraulically connected to the outlet end of the inclined control tube.
References Cited (Backward Citations)
US2379158A
Cited
US3142180A
Cited
US3144773A
Cited
US3482694A
Cited
US3666419A
Cited
US3640387A
Cited
US3615025A
Cited
US3739180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |