Stormwater Filter Assembly

• US 20080277327A1
• Filed: 05/09/2007
• Published: 11/13/2008
• Est. Priority Date: 05/09/2007
• Status: Active Grant

• Current Assignee: Contech Engineered Solutions, LLC (THE QUIKRETE Cos. LLC)
• Original Assignee: Contech Stormwater Solutions Incorporated
• Inventors: Cobb, Daniel P., Aberle, Daniel W., Hersey, Christopher S., Stone, Michael, Stiller, Matthew L., Kowalsky, Gregory, Weiler, Christopher W., Byrne, Gregory W. JR.
• Granted Patent: US 8,110,099 B2
• Time in Patent Office: Days
• US Class Current: 210/170.03
• CPC Class Codes: B01D 2201/0415 Details of supporting structures
• CPC Class Codes: B01D 2201/0438 mounted substantially vertically on plates at the lower side of the filter elements
• CPC Class Codes: B01D 2201/4015 Bayonet connecting means
• CPC Class Codes: B01D 35/147 Bypass or safety valves
• CPC Class Codes: E21B 33/1208 characterised by the construction of the sealing or packing means E21B33/1277 takes precedence

Abstract

A filter assembly for use in filtering stormwater includes a bottom including a boss that includes a rib extending laterally along an inner surface of the boss. The rib includes a locking portion that mates with a corresponding locking portion on a peripheral surface of a connection to an outlet conduit for securing the bottom to the connection thereby inhibiting rotation of the bottom relative to the outlet conduit. A center tube is secured to the bottom using a locking mechanism that inhibits relative movement between the bottom and the center tube. The center tube is in communication with an opening in the bottom and a hood is secured to the center tube. A filter medium is located between the hood and the center tube.

Claims

1. A filter assembly for use in filtering stormwater, comprising:

a bottom including a boss that includes a rib extending laterally along an inner surface of the boss, the rib including a locking portion that mates with a corresponding locking portion on a peripheral surface of a connection to an outlet conduit for securing the bottom to the connection thereby inhibiting rotation of the bottom relative to the outlet conduit;

a center tube secured to the bottom using a locking mechanism that inhibits relative movement between the bottom and the center tube, the center tube being in communication with an opening in the bottom;

a hood secured to the center tube; and

a filter medium located between the hood and the center tube.

2. The filter assembly of claim 1, wherein the hood and center tube include corresponding interlocking structure that inhibit rotation of the hood relative to the center tube with the hood secured to the center tube.

3. The filter assembly of claim 1 further comprising an outer screen secured to the bottom at a bottom portion of the outer screen to inhibit relative movement between the outer screen and the bottom.

4. The filter assembly of claim 3, wherein the outer screen is secured to the bottom using a fastener that is inserted through a peripheral wall of the bottom, through the outer screen and into the bottom.

5. The filter assembly of claim 1 further comprising a top ring that receives an upper edge of an outer screen within a groove, the outer screen located between the hood and the filter medium.

6. The filter assembly of claim 5, wherein the top ring is secured to the outer screen with a fastener inserted through an outer portion of the top ring, through the outer screen and into an inner portion of the top ring.

7. The filter assembly of claim 1 further comprising an inner drainage space cap that is connected to an upper extending end of the center tube that extends beyond an opening in the hood.

8. The filter assembly of claim 7, wherein the inner drainage space cap includes a gasket, the gasket engaging the hood forming an air-tight seal therebetween.

9. The filter assembly of claim 8, wherein the inner drainage space cap includes a check valve that is configured to permit air to escape but not enter a drainage space within the center tube such that a siphon can be established during operation.

10. The filter assembly of claim 1, wherein a height of the filter media is more than about 20 inches.

11. The filter assembly of claim 1, wherein the hood has a top having a series of ribs extending radially between a periphery of the top and a center of the top.

12. The filter assembly of claim 1, wherein the hood includes ribs extending outwardly from an outer periphery of the hood, the ribs being configured to maintain some spacing between stacked hoods.

13. A method of assembling a filter assembly for use in filtering stormwater, the method comprising:

securing a center tube to a bottom using a locking mechanism inhibiting relative movement between the bottom and the center tube, the center tube being in communication with an opening in the bottom;

securing a hood to the center tube inhibiting relative movement between the center tube and the hood;

providing a filter media between the hood and the center tube; and

applying a rotational force to the assembly which causes the center tube and bottom to rotate during installation.

14. The method of claim 13 further comprising securing an outer screen to the bottom at a bottom portion of the outer screen to inhibit relative movement between the outer screen and the bottom, the outer screen positioned between the hood and the filter media.

15. The method of claim 14, wherein the step of securing the outer screen to the bottom comprises inserting a fastener through a peripheral wall of the bottom, through the outer screen and into the bottom.

16. The method of claim 14, wherein the step of locating the outer screen on the bottom comprises positioning the bottom portion of the outer screen within a gap formed between the radially extending rib and the peripheral outer wall.

17. The method of claim 14 further comprising placing an upper edge of the outer screen within a top ring having a groove sized to receive the upper edge of the outer screen.

18. The method of claim 17 further comprising securing the outer screen to the top ring by inserting a fastener through an outer portion of the top ring, through the outer screen and into an inner portion of the top ring.

19. The method of claim 14 further comprising connecting an inner drainage space cap onto an upper extending end of the center tube that extends beyond an opening in the hood, the inner drainage space cap including a rim having a gasket, the gasket engaging the hood forming an air-tight seal therebetween.

20. The method of claim 19, wherein the inner drainage space cap includes a check valve that is configured to permit air to escape but not enter a drainage space within the center tube such that a siphon can be established during operation.

21. The method of claim 13 further comprising securing the bottom onto an outlet conduit connection by rotating the hood, center tube and bottom together, the bottom including a boss that includes a tab portion that mates with a corresponding recess portion on a peripheral surface of the outlet conduit connection for securing the bottom to the outlet conduit connection thereby inhibiting rotation of the bottom relative to the outlet conduit connection and providing positive feedback that the bottom is secured to the outlet conduit connection.

22. A stormwater treatment system for use in filtering stormwater, comprising:

an outlet conduit connection that connects to a filter conduit for use in delivering filtered stormwater toward an outlet of the stormwater treatment system, the outlet conduit connection comprising a locking portion on a peripheral surface of the outlet conduit connection; and

a filter assembly comprising

a bottom including a boss that includes a rib extending laterally along an inner surface of the boss, the rib including a locking portion that mates with the snap lock portion on the peripheral surface of the outlet conduit connection for securing the bottom to the outlet conduit connection thereby inhibiting rotation of the bottom relative to the outlet conduit connection;

a center tube secured to the bottom using a locking mechanism that inhibits relative movement between the bottom and the center tube, the center tube being in communication with an opening in the bottom and the outlet conduit connection;

a hood secured to the center tube; and

a filter media between the hood and the center tube.

23. The stormwater treatment system of claim 22, wherein the outlet conduit connection includes an outwardly extend rib that mates with a bottom of the bottom.

24. The stormwater treatment system of claim 22 further comprising a outlet conduit connection mount located between the outlet conduit connection and filter conduit.

25. A filter assembly for use in filtering stormwater, comprising:

a housing structure;

a drainage space within the housing structure; and

a filter medium between the drainage space and housing structure;

wherein the housing structure includes a lower portion with a mount opening for mating with an outlet conduit connection, the mount opening including a pair of circumferentially extending and diametrically opposed ribs extending radially inwardly.

26. The filter assembly of claim 25, wherein each rib includes a locking tab at one end thereof, the locking tab formed by a raised protrusion of the upper surface of the rib.