Filtration device with step
View Patent ↗A gutter guard for filtering water that enters a rain gutter on a building includes: a screen body configured to be positioned above a lowest portion of the rain gutter and having a plurality of openings that are penetrable by water. The screen body has a first surface, a second surface, and a channel positioned between the first surface and the second surface. The channel has a first wall adjacent to and extending in a first direction from the first surface, the first wall having a height in the first direction, a second wall adjacent to and extending in the first direction from the second surface, the second wall having a height in the first direction, and a joining section that joins the first wall to the second wall. The height of the first wall and the height of the second wall are different.
1 . A gutter guard for filtering water that enters a rain gutter on a building, the gutter guard comprising:
a screen body configured to be positioned above a lowest portion of the rain gutter and having a plurality of openings that are penetrable by water, the screen body having
a first surface;
a second surface; and
a channel positioned between the first surface and the second surface, the channel having
a first wall adjacent to and extending in a first direction from the first surface, the first wall having a height in the first direction,
a second wall adjacent to and extending in the first direction from the second surface, the second wall having a height in the first direction, and
a joining section that joins the first wall to the second wall,
wherein the height of the first wall and the height of the second wall are different,
the first wall contacts the second wall for the entire height of one of the first wall or the second wall, and
the screen body is a mesh.
2 . The gutter guard of claim 1 , wherein the first surface is planar,
the second surface is planar, and
the first surface and the second surface are not coplanar.
3 . The gutter guard of claim 1 , wherein the first wall is configured to extend in the first direction into the gutter.
4 . The gutter guard of claim 1 , wherein the screen body is configured such that the second surface is downstream of the first surface when installed on the gutter.
5 . The gutter guard of claim 4 , wherein the height of the first wall is larger than the height of the second wall.
6 . The gutter guard of claim 4 , wherein the height of the first wall is smaller than the height of the second wall.
7 . The gutter guard of claim 6 , further comprising a solid material insert adjacent the second wall, the solid material insert extending above the first surface in a direction opposite to the first direction.
8 . The gutter guard of claim 1 , wherein the mesh is a single layer mesh.
9 . The gutter guard of claim 1 , further comprising a solid material reinforcement bar located where the first wall extends from the first surface.
10 . The gutter guard of claim 1 , wherein the joining section is U-shaped.
11 . The gutter guard of claim 1 , wherein the joining section is V-shaped.
12 . The gutter guard of claim 1 , further comprising a third wall adjacent to and extending in the first direction from the second surface,
a third surface,
a fourth wall adjacent to and extending in the first direction from the third surface, and
a second joining section that joins the third wall to the fourth wall.
13 . The gutter guard of claim 1 , wherein at least a portion of the second surface is configured to be positioned vertically between a front lip of rain gutter and the lowest portion of the rain gutter,
wherein the front lip of the rain gutter is located opposite to a portion of the gutter that is configured to attach to the building.
14 . A filtration screen for filtering a liquid that flows over the filtration screen from an upstream position to a downstream position, the filtration screen comprising:
a screen body having a plurality of openings that are penetrable by the liquid, the screen body having
a first surface comprising at least a portion of the plurality of openings;
a second surface; and
a channel positioned between the first surface and the second surface, the channel having
a first wall adjacent to and extending in a first direction from the first surface, the first wall having a height in the first direction,
a second wall adjacent to and extending in the first direction from the second surface, the second wall having a height in the first direction, and
a joining section that joins the first wall to the second wall,
wherein the height of the first wall and the height of the second wall are different, and
the first wall contacts the second wall for the entire height of one of the first wall or the second wall.
15 . The gutter guard of claim 14 , wherein the screen body is an expanded metal.
16 . The filtration screen of claim 14 , wherein the second surface is downstream of the first surface, and
the height of the first wall is smaller than the height of the second wall.
17 . The gutter guard of claim 14 , wherein second surface comprises at least a portion of the plurality of openings.
18 . The gutter guard of claim 17 , wherein channel comprises at least a portion of the plurality of openings.
19 . A filtration screen for filtering a liquid that flows over the filtration screen from an upstream position to a downstream position, the filtration screen comprising:
a screen body having a plurality of openings that are penetrable by the liquid, the screen body having
a first surface comprising at least a portion of the plurality of openings;
a second surface;
a first channel having a first wall having a height, a second wall a height, and a joining section that joins the first wall to the second wall;
a second channel having a third wall, a fourth wall, and a joining section that joins the third wall to the fourth wall, and
a channel joining section that joins the second wall to the third wall, the channel joining section being one of U-shaped and V-shaped,
wherein the first wall adjoins the first surface,
the second wall adjoins the channel joining section,
the third wall adjoins the channel joining section,
the fourth wall adjoins the second surface, and
the height of the first wall and the height of the second wall are different, and
the first wall contacts the second wall for the entire height of one of the first wall or the second wall.
20 . The filtration screen of claim 19 , wherein the third wall has a height, and
the height of the third wall and the height of the second wall are different.
21 . The filtration screen of claim 19 , wherein the first surface is upstream from the first channel, and
the height of the first wall is smaller than the height of the second wall.
22 . The filtration screen of claim 19 , wherein the first surface is upstream from the first channel, and
the height of the first wall is larger than the height of the second wall.
23 . A gutter guard for filtering water that enters a rain gutter on a building, the gutter guard comprising:
a screen body configured to be positioned above a lowest portion of the rain gutter and having a plurality of openings that are penetrable by water, the screen body having
a first surface;
a second surface downstream of the first surface; and
a step positioned between the first surface and the second surface, the step having a wall extending in a first direction from the first surface to the second surface, the wall having a height in the first direction, the first direction being away from the lowest portion of the rain gutter, and the height being a distance between the first surface and the second surface at the wall,
wherein the first surface and the second surface are non-coplanar, and
the screen body is a mesh.
24 . The gutter guard of claim 23 , wherein the step is formed from more than one layer of the screen body.
25 . The gutter guard of claim 23 , further comprising a material attached to the screen body, wherein the material covers a portion of the step.
26 . The gutter guard of claim 23 , wherein the step is entirely in one plane, and the wall is entirely in the one plane.