Dryer vent

Abstract

A vent apparatus comprises a mount with air flow opening for mounting to a wall, a housing covering the mount, and a door pivoted to fall by gravity to a closed position but being movable to an open position when air flows from the air outflow passageway. The housing forms a downwardly and outwardly open chute extending well below a bottom of the mount and door, thus discouraging birds from approaching the air flow opening. The door and mount include bottom flanges that overlap when the door is in the closed position, further discouraging bird entry. The mount, housing and door are all metal with stiffening bends that are relatively simple construction, making assembly tow cost and providing a reliable function. The housing does not include large horizontal surfaces, thus discouraging birds and animals from building a nest in or on the housing.

Claims

1. A vent apparatus for assembly to a building exterior wall, comprising: a mount adapted for attachment to a building exterior wall and having an air flow opening generally matching an air outflow passageway in the building exterior wall; the mount including a wall-adjacent main flat panel and four flanges extending from edges of the main flat panel, including a bottom flange of the four flanges extending non-perpendicularly from the main flat panel; a housing attached to and covering the mount, the housing including a top wall of less than about 1½ inches, opposing side walls, and an outer planar angled wall connecting the top and side walls; the angled wall extending at about 20-30 degrees from vertical; a door pivoted to the mount for movement by gravity to a closed position but being movable to an open position when air flows out from the air outflow passageway; the door having a center flat panel and three flanges extending from edges of the flat panel including a bottom flange; and the side walls joining with the angled wall to form a downwardly and outwardly-extending chute extending below a bottom edge of the mount and door, whereby the angled wall and side walls make bird access to the air outflow opening very difficult; the angled wall and the top wall combining to prevent nesting thereon; wherein the side walls have downwardly-angled bottom edges that angle outwardly away from the mount; wherein a lowermost edge of the angled wall extends below the air flow opening by a dimension that is at least 50% greater than a vertical height of the air flow opening; wherein the bottom flanges of the mount and door overlap when the door is in the closed position, thus making entry more difficult when the door is closed; wherein the bottom flange of the mount is horizontally larger than the bottom flange of the door; wherein the bottom flange of the mount is angled and non-parallel to the bottom flange of the door when the door is in the closed position, the angle of the bottom flange of the mount extending upwardly away from the air flow opening and extending inward beyond the door's bottom flange when the door is closed to thus combine with the bottom flange of the door to discourage a nest from being built inside the housing.

2. The apparatus of claim 1, wherein the housing is made from a one piece sheet.

3. The apparatus of claim 1, wherein the mount is made from a one piece sheet.

4. The apparatus of claim 1, wherein the door is made from a one piece sheet.

5. The apparatus of claim 1, including grommets on the mount to reduce noise when the door swings closed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a perspective view showing a building wall with dryer vent.

(2) FIGS. 2-3 are side views of the vent apparatus with the closest side section of the housing removed to show underlying components, FIG. 2 showing the door closed, and FIG. 3 showing the door open.

(3) FIG. 4 is an exploded perspective view of the housing, the door, and the mount of FIG. 1.

(4) FIG. 5 is a perspective view of FIG. 1 from the mount-side of the assembly.

(5) FIGS. 6-7 are bottom perspective and side views of the apparatus in FIG. 3 with the door open.

(6) FIG. 8 is a fragmentary view of an inside lower half of the mount, including rubber grommets eliminating noise from the door closing.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

(7) The present vent apparatus 30 (FIGS. 1-4) for a building exterior wall 20 comprises a mount 31 with air flow opening 32, a housing 33 covering the mount 31, and a door 34 pivoted for movement to fall by gravity to a closed position (FIG. 2) but being movable to an open position (FIG. 3) when air flows from the air outflow passageway 21 through air flow opening 32. A shape of the housing 33 and the overlapping construction of the mount 31 and door 34 reduce a likelihood of a bird, animal or even insects from building a nest on or in the apparatus 30, as discussed below,

(8) The housing 33 (FIG. 4) is made from one piece and includes opposing side walls 40, 41, an angled wan 42, and a top wall 43 that join to form a downwardly and outwardly-extending chute extending well below a bottom edge of the mount 31 and door 34. A size and shape of the chute discourages birds from approaching the air flow opening 32 and from building a nest inside or on the apparatus 30 due to lack of a large flat horizontal surface to do so. The door 34 and mount 31 include bottom flanges 34′ and 31′ extending in non-parallel planes but extending generally horizontally, such that they overlap when the door 34 is in the closed position. This overlap further discourages bird, animal, or insect entry. The mount 31, housing 33 and door 34 are all metal of relatively simple construction, each including a relatively flat main panel and having stiffening bends or bent panel sections that extend from edges of the flat main panel. This provides an unusually low part cost, low assembly cost, and a highly robust and reliable function.

(9) As noted above, the housing 33 includes opposing side walls 40, 41 and an angled wall 42 and top wall 43 that join to form a downwardly and outwardly-extending chute extending well below a bottom edge of the mount 31 and door 34. The housing 33 can be made from a single flat sheet, with the walls 40-41, 43 being formed by single bends along edges of the main angled panel 42. Three self-threading screws 44 extend through holes 45 in the housing 33 into holes 46 in the mount 31 to fix the housing 33 to the mount 31. Notably, a bottom edge of the angled wall 42 extends below the mount 31 sufficiently to better accomplish its purpose of preventing access the opening 32. For example, a preferred dimension D1 is preferably at least about 50% of the diameter D2 of the air flow opening 32. However, it is noted that this dimension can be varied as needed to satisfy requirements of a particular installation. Also, the side walls 40-41 of the housing 33 define an inner lower corner 48 adjacent the building that preferably extends at least about a ½″ below the mount 31. The outer corner 48′ of the housing 33 extends significantly downward from the inner lower corner 48, which also help prevent access to the air flow opening 32. Atop flange of the housing 33 is sufficiently small to make it difficult for a bird to build a nest on the housing 33, especially when combined with the angled outer wall 42.

(10) A size and shape of the chute defined by the housing 33 can be varied as desired for a particular installation or geographic region. The illustrated housing has a top wall dimension of about 1½″×7″, and an angled wall dimension of about 7″×10½″. The angled wall is angled at about 20-30 degrees from vertical, and the side wall dimensions are about 7½″ vertical and about 4½″ width (measured horizontally from a lower edge under the mount 31), with a maximum length of 10½″ along its longest edge that is connected to the angled wall of the housing 33. The narrow top wall 43 prevents (or at least discourages) a nest from being built on top of the apparatus 30, and the angled orientation of the angled wall 42 along with the door 34 and mount 31 prevent any nest from being built inside the housing 33.

(11) The mount 31 is about 7″ vertically and 7″ wide, and includes stiffening flanges 50 on all four edges of its main flat panel that defines the air flow opening 32. All of the stiffening flanges 50 are about ½″ in width, and are formed perpendicularly to the main flat panel, except the bottom stiffening flange 50. The bottom stiffening flange 50 is angled upwardly toward the door 34, such as about 20 degrees from horizontal, and is slightly longer in length than the bottom flange of the door 34. This creates an overlap that is difficult for birds or animals to open. It is noted that some birds and animals can learn how to open doors if there is sufficient structure for them to do so. Notably, dust, debris and lint can accumulate in vents, resulting in a door being held partially open, leading to a problem over time.

(12) The illustrated door 34 includes a main flat panel and includes stiffening flanges 52 on its sides along with bottom flange 34′. The illustrated door 34 does not include any stiffening flange on its top edge. A threaded bolt 53 extends through a hole 54 in each side of the housing 33 and includes a first nut 55 that fixedly captures the mount 31 on the housing 33. The bolt 53 extends through a 2.sup.nd hole 56 at a top of the door's side edge flanges, and a second nut 57 spaced from not 55 loosely captures the door 34 on the bolt 53, allowing the door 34 to pivot freely on the bolt 53. When assembled, the axes A1-A3 are all collinear.

(13) Rubber grommets 60 (FIG. 8) can be added in the mount 31 to dampen door closure, thus reducing noise from the door falling closed. The illustrated grommets 60 are in a low location on the mount in a location where they do not interfere with the overlapping flanges on the mount 31 and door 34.

(14) Thus, it is to be understood that variations and modifications can be made on the aforementioned structure without departing from the concepts of the present invention, and further it is to be understood that such concepts are intended to be covered by the following claims unless these claims by their language expressly state otherwise.