Patent US3886902A successfully refreshed from Google Patents.
US3886902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating fish raising tank system with cleanable filter
Assignee: Individual
•
Filing: 1974-01-02
•
Granted: 1975-06-03
•
Expires: 1994-01-02
Abstract
Abstract A recirculating fish raising tank system for raising fingerlings to maturity has cleaning brushes for stirring up waste material on the bottom of each tank to let droppings through while keeping the fish off the bottom, means for pumping water from the tanks to the top of the filter, means for returning the filtered water to the tanks, and means for cleaning the filter including means for backflushing the filter and means for draining the filter.
Inventors
- 👤 Robert C Haynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:05
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01K63/045; A01K61/00; A01K63/10; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02A40/81
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
313 words
A recirculating fish raising tank system with cleanable filter including a filter means, at least one tank, means for removing waste material from each tank and transmitting the waste material with water from each tank into the filter means, mEans for transmitting the filtered water back into the tank, means for aerating the water in each tank, and means for backwashing and cleaning the filter in which each tank has a bottom which is sloped downwards towards its center in which the means for removing waste material from each tank includes rotating brush means for stirring up the waste material on the bottom of each tank and a drain pipe extending down from the center of the bottom of each tank, in which the means for transmitting the waste material with water from each tank into a filter means includes, in addition to the drain pipe, pump means connected to the drain pipe and pipe running from the pump means into the upper part of the filter means, in which the means for transmitting the filtered water back into each tank includes a pipe running from the lower part of the filter means into each tank, said pipe having numerous perpendicular extensions each having structure defining holes, and in which the means for aerating the water in each tank is also the means for rotating the brush at the bottom of each tank and includes a free swivelling pipe mounted at the center and parellel to the sides of each tank through which compressed air is introduced, said pipe having an extension parallel to the bottom of each tank and structure defining numerous small holes in said extension, the brush elements also being mounted in said extension so that the compressed air emanating from the holes in the said extension aerates the water and causes the extension with attached brush elements to rotate.
Claim 2
Dependent Claim
313 words
A recirculating fish raising tank system with cleanable filter including a filter means, at least one tank, means for removing waste material from each tank and transmitting the waste material with water from each tank into the filter means, mEans for transmitting the filtered water back into the tank, means for aerating the water in each tank, and means for backwashing and cleaning the filter in which each tank has a bottom which is sloped downwards towards its center in which the means for removing waste material from each tank includes rotating brush means for stirring up the waste material on the bottom of each tank and a drain pipe extending down from the center of the bottom of each tank, in which the means for transmitting the waste material with water from each tank into a filter means includes, in addition to the drain pipe, pump means connected to the drain pipe and pipe running from the pump means into the upper part of the filter means, in which the means for transmitting the filtered water back into each tank includes a pipe running from the lower part of the filter means into each tank, said pipe having numerous perpendicular extensions each having structure defining holes, and in which the means for aerating the water in each tank is also the means for rotating the brush at the bottom of each tank and includes a free swivelling pipe mounted at the center and parellel to the sides of each tank through which compressed air is introduced, said pipe having an extension parallel to the bottom of each tank and structure defining numerous small holes in said extension, the brush elements also being mounted in said extension so that the compressed air emanating from the holes in the said extension aerates the water and causes the extension with attached brush elements to rotate.
Claim 3
Dependent Claim
313 words
A recirculating fish raising tank system with cleanable filter including a filter means, at least one tank, means for removing waste material from each tank and transmitting the waste material with water from each tank into the filter means, mEans for transmitting the filtered water back into the tank, means for aerating the water in each tank, and means for backwashing and cleaning the filter in which each tank has a bottom which is sloped downwards towards its center in which the means for removing waste material from each tank includes rotating brush means for stirring up the waste material on the bottom of each tank and a drain pipe extending down from the center of the bottom of each tank, in which the means for transmitting the waste material with water from each tank into a filter means includes, in addition to the drain pipe, pump means connected to the drain pipe and pipe running from the pump means into the upper part of the filter means, in which the means for transmitting the filtered water back into each tank includes a pipe running from the lower part of the filter means into each tank, said pipe having numerous perpendicular extensions each having structure defining holes, and in which the means for aerating the water in each tank is also the means for rotating the brush at the bottom of each tank and includes a free swivelling pipe mounted at the center and parellel to the sides of each tank through which compressed air is introduced, said pipe having an extension parallel to the bottom of each tank and structure defining numerous small holes in said extension, the brush elements also being mounted in said extension so that the compressed air emanating from the holes in the said extension aerates the water and causes the extension with attached brush elements to rotate.
Claim 4
Dependent Claim
313 words
A recirculating fish raising tank system with cleanable filter including a filter means, at least one tank, means for removing waste material from each tank and transmitting the waste material with water from each tank into the filter means, mEans for transmitting the filtered water back into the tank, means for aerating the water in each tank, and means for backwashing and cleaning the filter in which each tank has a bottom which is sloped downwards towards its center in which the means for removing waste material from each tank includes rotating brush means for stirring up the waste material on the bottom of each tank and a drain pipe extending down from the center of the bottom of each tank, in which the means for transmitting the waste material with water from each tank into a filter means includes, in addition to the drain pipe, pump means connected to the drain pipe and pipe running from the pump means into the upper part of the filter means, in which the means for transmitting the filtered water back into each tank includes a pipe running from the lower part of the filter means into each tank, said pipe having numerous perpendicular extensions each having structure defining holes, and in which the means for aerating the water in each tank is also the means for rotating the brush at the bottom of each tank and includes a free swivelling pipe mounted at the center and parellel to the sides of each tank through which compressed air is introduced, said pipe having an extension parallel to the bottom of each tank and structure defining numerous small holes in said extension, the brush elements also being mounted in said extension so that the compressed air emanating from the holes in the said extension aerates the water and causes the extension with attached brush elements to rotate.
Claim 5
Dependent Claim
177 words
A recirculating fish raising tank system with cleanable filter as described in claim 1 in which the means for backwashing and cleaning the filter includes first valve means connected to the pipe running from the drain at its side of inlet to the filter means from the drain, second valve means connected to the pipe running from the drain at its side of outlet from the filter means, third valve means connected to the pipe running from the lower part of the filter means into each tank at its side of outlet from the filter means, and fourth valve means connected to the pipe running from the lower part of the filter means into each tank at its side of inlet to the filter means wherein the first and third valve means are closed and the second valve means is opened after which the fourth valve means is opened and clean water is pumped into the pipe running from the lower part of the filter into each tank at its side of inlet to the filter means.
Claim 6
Dependent Claim
46 words
A recirculating fish raising tank system with cleanable filter as described in claim 2 in which the pipe running from the drain is cut away as it runs through the filter means so that water and waste can spill over the side within the filter means.
Claim 7
Dependent Claim
60 words
A recirculating fish raising tank system with cleanable filter as described in claim 3 including a mesh screen in which a flange extends within each tank near its bottom and the mesh screen rests on such flange to allow fish droppings to pass through to the bottom of the tank while keeping the fish off the bottom of the tank.
Claim 8
Dependent Claim
40 words
A recirculating fish raising tank system with cleanable filter as described in claim 4 in which the filter means includes filter material including layers going from top to bottom of coarse river sand, river rock, oyster shells, and crushed limestone.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |