Filter cartridge with check valve protection
First Claim
1. A filter assembly for removing pollutants from stormwater, comprising:
- a cylindrical hood having a lower edge, the hood incorporating a horizontally-aligned array of voids near the lower edge;
a cylindrical drainage space disposed concentrically within the hood;
a filter, disposed in the annular space between the hood and the drainage space, and in fluid communication with the drainage space;
a check valve in the hood, configured to permit air to escape the filter assembly in response to rising stormwater within the hood, but to prevent air from entering the filter assembly; and
a check valve cap that is coupled to the hood, where the check valve cap is configured to permit air to escape the check valve and to prevent stormwater from contacting the check valve when the filter assembly is submerged in stormwater.
15 Assignments
0 Petitions
Accused Products
Abstract
A filter assembly is provided that includes a hood, a drain manifold, a filter disposed between the hood and the drain manifold, a drainage space that is disposed between and in fluid communication with both the filter medium and the drain manifold, a check valve that is configured to permit air to escape but not to enter the drainage space so that a siphon can be established that draws additional fluid through the filter medium and into the drain manifold, the siphon continuing until air entering the hood disrupts the siphon, and a check valve cap that is configured to permit air to escape the check valve while preserving an air-filled void above the check valve when the filter assembly is submerged.
81 Citations
22 Claims
-
1. A filter assembly for removing pollutants from stormwater, comprising:
-
a cylindrical hood having a lower edge, the hood incorporating a horizontally-aligned array of voids near the lower edge; a cylindrical drainage space disposed concentrically within the hood; a filter, disposed in the annular space between the hood and the drainage space, and in fluid communication with the drainage space; a check valve in the hood, configured to permit air to escape the filter assembly in response to rising stormwater within the hood, but to prevent air from entering the filter assembly; and a check valve cap that is coupled to the hood, where the check valve cap is configured to permit air to escape the check valve and to prevent stormwater from contacting the check valve when the filter assembly is submerged in stormwater. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A filter assembly for removing pollutants from stormwater, comprising:
-
a hood; an outlet; a filter medium disposed between the hood and the outlet; a drainage space that is disposed between and in fluid communication with both the filter medium and the outlet; a check valve that is configured to permit air to escape but not to enter the drainage space, such that a siphon can be established that draws additional fluid through the filter medium and out of the outlet, the siphon continuing until air entering the hood disrupts the siphon; and a check valve cap that is configured to permit air to escape the check valve while preserving an air-filled void above the check valve when the filter assembly is submerged in stormwater. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
Specification