IP Library Granted Patent US 7,591,381
Granted Patent B2
US 7,591,381 · App. 11/888,319 · Granted Sep 22, 2009

Cover system and method for making the same for use with a twin channel clarifier tank

Assignee: NEFCO
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Quick Facts
Patent No.
US 7,591,381
App. No.
11/888,319
Granted
Sep 22, 2009
Kind
B2
Abstract

A cover system for a clarifier tank having a combined effluent and influent trough separated by a dividing wall. The cover system includes a mounting bracket attached to an inboard wall of the influent trough and at least one openable cover panel attached to the mounting bracket. An opposite support bracket is located on the dividing wall between the influent and the effluent troughs, where the cover panel covers the effluent channel and is openable for cleaning of the effluent channel.

Claims (14)

1. A cover system for a clarifier tank having a combined effluent and influent trough separated by a dividing wall, said cover system comprising:

a mounting bracket attached to an inboard wall of said influent trough;

at least one openable cover panel attached to said mounting bracket; and

an opposite support bracket located on said dividing wall between said influent and said effluent troughs, wherein said cover panel covers said effluent trough channel and is openable for cleaning of said effluent trough channel, wherein said dividing wall separating said effluent trough and said influent trough is irregularly shaped resulting in the relative widths of said influent and effluent troughs changing around the circumference of said tank and wherein said cover panel has a hinge portion and a support bracket portion, wherein only said support bracket portion is cut to fit said irregularly shaped dividing wall.

2. The system as claimed in claim 1 , further comprising a plurality of cover panels for covering the entire effluent trough channel.

3. The system as claimed in claim 1 , further comprising a handle and latch for locking said cover panel against said opposite support bracket.

4. The system as claimed in claim 1 , further comprising a restraining that is attached to cover panel to prevent it from opening too far, and to allow a force applied to the restraining wire to close said cover panel.

5. The system as claimed in claim 1 , wherein said cover panel further maintain a hinge and integrated baffle portion.

6. The system as claimed in claim 5 , wherein said mounting bracket is configured to support said cover panel and said hinge in such a manner that, when opened, the entire effluent trough channel and weir are exposed for cleaning.

7. A method for covering a clarifier tank having a combined effluent and influent trough separated by an irregularly shaped dividing wall that results in varying width effluent and influent troughs, said method comprising the steps of:

attaching a mounting bracket to an inboard wall of said influent trough;

attaching an opposite support bracket to said dividing wall between said influent and said effluent troughs;

obtaining a cover panel having a hinge portion and a support bracket portion, and cutting only said support bracket portion to match the shape of said dividing wall corresponding to the attachment location of said cover panel, wherein said dividing wall separating said effluent trough and said influent trough is irregularly shaped resulting in the relative widths of said influent and effluent troughs changing around the circumference of said tank; and

attaching at least one openable cover panel to said mounting bracket for covering said effluent trough.

Assignments (9)
SECURITY INTEREST Recorded May 7, 2026
From: NORTH AMERICAN FILTRATION HOLDINGS LLC; NAF WATER FILTRATION ENTERPRISES LLC; NAF WATER FILTRATION LLC; NAF WATER SOLUTION ENTERPRISES LLC; CHEMTRAC LLC; NAF AQUATICS LLC
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 074586/0152 →
NUNC PRO TUNC ASSIGNMENT Recorded Nov 26, 2025
From: NEFCO SYSTEMS, INC.
To: NAF CONTRCO LLC
Reel/Frame 073041/0957 →
NUNC PRO TUNC ASSIGNMENT Recorded Nov 26, 2025
From: NAF CONTRCO LLC
To: NORTH AMERICAN FILTRATION HOLDINGS LLC
Reel/Frame 073042/0288 →
NUNC PRO TUNC ASSIGNMENT Recorded Nov 26, 2025
From: NORTH AMERICAN FILTRATION HOLDINGS LLC
To: NORTH AMERICAN FILTRATION ENTERPRISES LLC
Reel/Frame 073042/0447 →
NUNC PRO TUNC ASSIGNMENT Recorded Nov 26, 2025
From: NAF WATER FILTRATION ENTERPRISES LLC
To: NAF WATER FILTRATION LLC
Reel/Frame 073042/0701 →
RELEASE OF SECURITY INTEREST Recorded Nov 3, 2025
From: LIVE OAK BANKING COMPANY
To: NORTH AMERICAN FILTRATION HOLDINGS LLC; NAF WATER FILTRATION ENTERPRISES LLC; NAF AQUATICS ENTERPRISES LLC; NAF AQUATICS LLC; CHEMTRAC LLC; NAF WATER SOLUTIONS ENTERPRISES LLC; NAF WATER FILTRATION LLC
Reel/Frame 072760/0571 →
SECURITY INTEREST Recorded Apr 6, 2022
From: NORTH AMERICAN FILTRATION HOLDINGS LLC; NAF WATER FILTRATION ENTERPRISES LLC; NAF WATER SOLUTIONS ENTERPRISES LLC; NAF AQUATICS ENTERPRISES LLC; NAF WATER FILTRATION LLC; CHEMTRAC LLC; NAF AQUATICS LLC
To: LIVE OAK BANKING COMPANY
Reel/Frame 059509/0921 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 18, 2016
From: NEFCO, INC.
To: NEFCO SYSTEMS, INC.
Reel/Frame 039175/0869 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 12, 2009
From: SCHALLER, EARLE
To: NEFCO
Reel/Frame 023089/0250 →
Continuity (1)
Related Publication 20090032476A1 · Feb 5, 2009