Patent US3868324A successfully refreshed from Google Patents.
US3868324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water intake and fish return system
Assignee: Siemens Water Technologies Holding Corp
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Filing: 1972-12-22
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Granted: 1975-02-25
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Expires: 1992-12-22
Abstract
Abstract A travelling water screen unit comprises an endless series of pivotally interconnected rectangular screens. Each screen comprises a frame having ends attachable to corresponding links of parallel chains and a grille having upright bars which are spaced just sufficiently closely to divert the fish swimming or being carried in the flow. The larger debris carried by the flow in the channel is intercepted by the screens moving upwardly therein and is removed by backwash sprays from the screens approaching the upper drive and support means above the channel. Such units and their intermediate support columns are set flush and in a straight row but at a sharp angle in the order of 30* respecting the approaching flow so that fish are diverted toward the end of the row and into a fish receiving channel from which they are periodically returned to the natural watercourse.
Inventors
- 👤 Robert F Taylor
- 👤 Donald A Strow
- 👤 Hosein Mansouri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:44
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/333; A; A01; A01K; A01K79/00; B07; B07B; B07B1/00; B07B1/10; E; E02; E02B; E02B1/00; E02B1/006; E02B8/00; E02B8/02; E02B8/023; E02B8/026; E02B9/00; E02B9/02; E02B9/04; Y; Y02; Y02A; Y02A40/00; Y02A40/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
210 words
A water intake structure comprising side walls forming a channel and spaced, rigid columns within the channel, a series of travelling water screen units supported by and between said columns, the forward faces of the screens of each unit being flush with the faces of the intermediate columns, said faces being arranged in a straight line extending at an angle across the channel and respecting the direction of flow approaching the screens, an opening in one channel wall where said line of screens meets said one wall at said angle, said angle being in the order of 30* so that the fish swimming away from the screens may be carried sideward by the flow in the one direction only which is toward said opening through which they may leave the channel, each screen having a rectangular frame, the frames of the screens of each unit being pivotally interconnected in an endless series, each travelling water screen unit further comprising a rotating drive means over which the series operates and from which the frames are suspended in the water intake channel and means for flushing debris from the upward run of the screens emerging from the channel;, the screen of each said unit comprising a series of laterally spaced vertical bars.
Claim 2
Dependent Claim
210 words
A water intake structure comprising side walls forming a channel and spaced, rigid columns within the channel, a series of travelling water screen units supported by and between said columns, the forward faces of the screens of each unit being flush with the faces of the intermediate columns, said faces being arranged in a straight line extending at an angle across the channel and respecting the direction of flow approaching the screens, an opening in one channel wall where said line of screens meets said one wall at said angle, said angle being in the order of 30* so that the fish swimming away from the screens may be carried sideward by the flow in the one direction only which is toward said opening through which they may leave the channel, each screen having a rectangular frame, the frames of the screens of each unit being pivotally interconnected in an endless series, each travelling water screen unit further comprising a rotating drive means over which the series operates and from which the frames are suspended in the water intake channel and means for flushing debris from the upward run of the screens emerging from the channel;, the screen of each said unit comprising a series of laterally spaced vertical bars.
Claim 3
Dependent Claim
91 words
The structure of claim 1 wherein each travelling water screen unit has spaced vertical fixed sealing strips extending to the adjoining columns and the series of interconnected rectangular screen frames are disposed for upward movement between said strips, each frame having upright end plate members, each plate member being slidable on the respective strip to hold the screen against the sideward force which is due to the impingement of the water against the bars, said end plate members and strips being flush with the forward faces of said bars and columns.
Claim 4
Dependent Claim
21 words
The structure of claim 1 wherein said laterally spaced vertiCal bars are substantially flush with the front faces of said columns.
Claim 5
Dependent Claim
171 words
The structure of claim 1 wherein each of said travelling water screen units has a flexible flapper seal in vertically fixed relationship with the screens providing the entire closure of the lower ends of said travelling water screen units at the front of said screen units and said columns, each of said rectangular frames has vertical end plates and a forward projecting shelf for catching debris falling from the one of said screens above said shelf, each of said vertical end plates on the downstream side of each of said travelling water screen units is slidable on a strip provided to hold said screen units against the force of the water tending to push said screen units sideward in one direction, said vertical end plates and said strips are substantially flush with the front faces of said laterally spaced vertical bars and said columns, and said forward projecting shelf projects forwardly of said vertical end plates, said strips, and the forward faces of said laterally spaced vertical bars and said columns.
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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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |