US3929642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewatering system
Assignee: Linatex Corp of America
•
Filing: 1974-03-07
•
Granted: 1975-12-30
•
Expires: 1994-03-07
Abstract
Abstract A dewatering system employing a vibrating screen deck is provided with a vacuum chamber positioned beneath the downstream screen of the deck for removing substantial additional amounts of water from a bed of solid particulate material passing along the top surface thereof. The vacuum chamber is provided with an air pump for drawing air out of a vacuum chamber and with a water discharge regulator for sealing the chamber to assure passage of air into the chamber through only the overlying downstream screen panel. The water discharge regulator is a self-operating flexible member comprised essentially of a pair of flat generally rectangular rubber-like sheets arranged in confronting relationship and sealed along opposite edges. The sheets are provided with central reinforcing and stabilizing pads located on opposite sides of the regulator for urging the flat sheets into intimate surface contact to provide a closed sealed condition for accumulating water drawn into the vacuum compartment. The regulator is sufficiently flexible to permit controlled separation of the sheets for discharging the water within the vacuum chamber in response to the amount of water accumulated therein.
Inventors
- 👤 Robert E Ennis
- 👤 Robert G Derrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/20; B01D35/28; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7883
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
233 words
IN A DEWATERING SYSTEM FOR GRANULAR SOLID MATERIAL COMPRISED OF AN ELONGATED VIBRATORY SCREEN DECK HAVING A TOP SURFACE ALONG WHICH A BED OF SOLID GRANULAR MATERIAL TRAVELS RELATIVE TO SAID TOP SURFACE DURING DEWATERING AND A DISCHRAGE EDGE AT ONE END THEREOF, THE COMBINATION INCLUDING A VACUUM COMPARTMENT POSITIONED BENEATH A SCREEN PANEL PORTION OF SAID DECK ADJACENT SAID ONE END, SAID COMPARTMENT BEING IN COMMUNICATION WITH THE UNDERSIDE OF SAID PANEL PORTION FOR ASSISTING IN REMOVAL OF ADDITIONAL AMOUNTS OF FLUID FROM THE BED OF SOLID MATERIAL MOVING RELATIVE TO THE VIBRATORY OVERLYING TOP SURFACE, AN AIR PUMP ASSOCIATED WITH SAID COMPARTMENT FOR PRODUCING A PRESSURE DROP BETWEEN SAID TOP SURFACE AND SAID UNDERSIDE OF THE PANEL PORTION OVERLYING THE CHABER AND A WATER DISCHARGE REGULATOR FOR PERIODICALLY DISCHARGING WATER FROM SAID COMPARTMENT IN RESPONSE TO THE AMOUNT OF WATER ACCUMULATED THEREIN, SAID WATER DISCHARGE REGULATOR BEING A SELF-OPERATING, FLEXIBLE MEMBER HAVING A NECK PORTION AND A DIAPHRAGM PORTION MOVABLE BETWEEN AN OPEN DISCHARGE POSITION AND A CLOSED SEALED POSITION, SAID DIAPHRAGM PORTION DEPENDING INTERGRALLY FROM SAID NECK PORTION AND HAVING A REINFORCED TOP SECTION AND A CENTRAL STABILIZING PAD EXTENDING DOWNWARDLY THEREFROM, SAID CENTRAL STABILIZING PAD BEING OPERATIVE FOR CONSTANTLY BIASING SAID DIAPHRAGM PORTION INTO ITS CLOSED FLAT POSITION AND BEING MOVABLE INTO ITS OPEN POSITION IN RESPONSE TO THE WATER PRESSURE WITHIN THE COMPARTMENT ACTING ON SAID REINFORCED SECTION.
Claim 2
Dependent Claim
233 words
IN A DEWATERING SYSTEM FOR GRANULAR SOLID MATERIAL COMPRISED OF AN ELONGATED VIBRATORY SCREEN DECK HAVING A TOP SURFACE ALONG WHICH A BED OF SOLID GRANULAR MATERIAL TRAVELS RELATIVE TO SAID TOP SURFACE DURING DEWATERING AND A DISCHRAGE EDGE AT ONE END THEREOF, THE COMBINATION INCLUDING A VACUUM COMPARTMENT POSITIONED BENEATH A SCREEN PANEL PORTION OF SAID DECK ADJACENT SAID ONE END, SAID COMPARTMENT BEING IN COMMUNICATION WITH THE UNDERSIDE OF SAID PANEL PORTION FOR ASSISTING IN REMOVAL OF ADDITIONAL AMOUNTS OF FLUID FROM THE BED OF SOLID MATERIAL MOVING RELATIVE TO THE VIBRATORY OVERLYING TOP SURFACE, AN AIR PUMP ASSOCIATED WITH SAID COMPARTMENT FOR PRODUCING A PRESSURE DROP BETWEEN SAID TOP SURFACE AND SAID UNDERSIDE OF THE PANEL PORTION OVERLYING THE CHABER AND A WATER DISCHARGE REGULATOR FOR PERIODICALLY DISCHARGING WATER FROM SAID COMPARTMENT IN RESPONSE TO THE AMOUNT OF WATER ACCUMULATED THEREIN, SAID WATER DISCHARGE REGULATOR BEING A SELF-OPERATING, FLEXIBLE MEMBER HAVING A NECK PORTION AND A DIAPHRAGM PORTION MOVABLE BETWEEN AN OPEN DISCHARGE POSITION AND A CLOSED SEALED POSITION, SAID DIAPHRAGM PORTION DEPENDING INTERGRALLY FROM SAID NECK PORTION AND HAVING A REINFORCED TOP SECTION AND A CENTRAL STABILIZING PAD EXTENDING DOWNWARDLY THEREFROM, SAID CENTRAL STABILIZING PAD BEING OPERATIVE FOR CONSTANTLY BIASING SAID DIAPHRAGM PORTION INTO ITS CLOSED FLAT POSITION AND BEING MOVABLE INTO ITS OPEN POSITION IN RESPONSE TO THE WATER PRESSURE WITHIN THE COMPARTMENT ACTING ON SAID REINFORCED SECTION.
Claim 3
Dependent Claim
58 words
The dewatering system of claim 1 wherein the vacuum compartment has an air outlet port and a separate water outlet port, said air outlet port being connected to said air pump to facilitate air removal from said chamber to establish said pressure drop, said regulator being positioned at said water outlet port for controlling said periodic water discharge.
Claim 4
Dependent Claim
35 words
The dewatering system of claim 2 wherein said regulator seals said water outlet port and said air pump is exhaust fan for drawing air through said screen panel portion and the bed of material thereon.
Claim 5
Dependent Claim
53 words
The dewatering system of claim 1 wherein said water discharge regulator has a neck portion secured to said compartment for receiving water accumulated therein and an automatic fluid release portion integrally depending from said neck portion and movable between open and closed positions in response to the amount of water within the chamber.
Claim 6
Dependent Claim
63 words
The dewatering system of claim 1 wherein said reinforced top section is of Y-shaped configuration and said central stabilizing pad is circular and is spaced from said top section and extending downwardly therefrom, said pad being operative for urging the regulator into its closed condition, the spacing between the pad and the top section facilitating opening of the regulator by fluid bearing thereagainst.
Claim 7
Dependent Claim
59 words
The dewatering system of claim 1 wherein the vacuum compartment has a water outlet port, said regulator being positioned at said water outlet port for controlling said periodic water discharge, said regulator being comprised of a pair of flat sheet members movable between a closed position in intimate confronting surface engagement and an open position in spaced confronting relationship.
Claim 8
Dependent Claim
75 words
The dewatering system of claim 1 wherein the water discharge regulator is a self-operating flexible member comprised essentially of a pair of flat generally rectangular rubber-like sheets arranged in confronting relationship and sealed along opposite side edges, said sheets being provided with central reinforcing and stabilizing pads located on opposite sides of the regulator for urging the sheets into intimate surface engagement to provide a closed sealed condition for accumulating water within the vacuum compartment.
References Cited (Backward Citations)
US3116237A
Cited
US3426908A
Cited
US3319404A
Cited
US3421666A
Cited
US3719276A
Cited
US3595266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |