US3850804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screens for water intake systems
Assignee: Siemens Water Technologies Holding Corp
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Filing: 1972-12-22
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Granted: 1974-11-26
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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 screen insert which is separately fabricated and secured by bolts between the central horizontal members of the frame. The debris carried by the flow in a channel is intercepted by the lower, upward moving screens and is removed by backwash sprays from the screens approaching the upper drive and support means. Such units and their intermediate support columns may be set flush and in a straight line so that fish are readily diverted away from the screen.
Inventors
- 👤 R Taylor
- 👤 D Strow
- 👤 H Mansouri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/333
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A screen assembly to comprise one of a series of a travelling water screen unit having parallel chains for supporting the same, said screen comprising a rigid frame and a removable screen insert, the frame having upright end members, upper and lower flanged cross-members and an intermediate cross-brace, the insert being disposed to fit between said end members and against the cross-brace and the flanges of said cross-members, and shelf means attached to said cross-brace and overlying the insert to secure the latter in said frame, said screen insert comprising a rigid, rectangular perforate panel of nominal thickness and of a width and height substantially equal to the distances respectively between said end members and said cross members.
Claim 2
Dependent Claim
118 words
A screen assembly to comprise one of a series of a travelling water screen unit having parallel chains for supporting the same, said screen comprising a rigid frame and a removable screen insert, the frame having upright end members, upper and lower flanged cross-members and an intermediate cross-brace, the insert being disposed to fit between said end members and against the cross-brace and the flanges of said cross-members, and shelf means attached to said cross-brace and overlying the insert to secure the latter in said frame, said screen insert comprising a rigid, rectangular perforate panel of nominal thickness and of a width and height substantially equal to the distances respectively between said end members and said cross members.
Claim 3
Dependent Claim
66 words
The screen assembly of claim 1 wherein the insert includes a series of spaced vertical bars, the shelf means includes a projecting surface for catching debris falling from the bars above the shelf and a downward mounting flange and further includes bolts extending between bars from the flange to the cross-brace, the bolts allowing ready removal of the shelf means and the insert from the frame.
Claim 4
Dependent Claim
125 words
A screen for a travelling water screen unit which includes parallel chains for supporting an endless series of such screens, said screen comprising a rigid rectangular frame and a removable screen insert in the form of a rectangular panel having upper and lower margins, said frame having upright end members attachable to the corresponding links of the parallel chains of the unit, upper and lower cross members connecting said end members, and an intermediate horizontal rear cross brace having ends secured to said end members, said screen insert being disposed and fitting within the frame comprising such members and abutting the cross members and cross brace so as to be held against the flow centrally of the insert and along its upper and lower margins.
Claim 5
Dependent Claim
125 words
A screen for a travelling water screen unit which includes parallel chains for supporting an endless series of such screens, said screen comprising a rigid rectangular frame and a removable screen insert in the form of a rectangular panel having upper and lower margins, said frame having upright end members attachable to the corresponding links of the parallel chains of the unit, upper and lower cross members connecting said end members, and an intermediate horizontal rear cross brace having ends secured to said end members, said screen insert being disposed and fitting within the frame comprising such members and abutting the cross members and cross brace so as to be held against the flow centrally of the insert and along its upper and lower margins.
Claim 6
Dependent Claim
32 words
The screen of claim 3 wherein the screen insert panel comprises a series of laterally spaced vertical bars and a number of vertically spaced cross connecting elements which join the vertical bars.
Claim 7
Dependent Claim
42 words
The screen of claim 3 which further includes a central horizontaL shelf for catching debris falling from the screen and having attachment means which overlies the insert and are removably secured by bolts extending directly through the insert to the cross brace.
Claim 8
Dependent Claim
40 words
the screen of claim 3 wherein the screen insert panel is of thickness such that, when it is positioned against the intermediate horizontal rear cross brace, its opposite face is flush with the corresponding faces of the upright end members.
Claim 9
Dependent Claim
15 words
The screen of claim 3 wherein the screen insert is formed from a walkway grill.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |