Patent Publication Number: US-2005143002-A1

Title: Wooden vent cover

Description:
CROSS-REFERENCE TO RELATED APPLICATION  
      This application is a continuation of application Ser. No. 10/441,996, filed May 19, 2003, inventor Gary R. Orendorff, and entitled “Wooden Vent Cover”, which is a continuation-in-part of application Ser. No. 10/154,949, filed May 23, 2002, now U.S. Pat. No. 6,832,951, inventor Gary R. Orendorff, and entitled “Vent Assembly and Method”, and a continuation-in-part of application Ser. No. 10/383,314, filed Mar. 7, 2003, now U.S. Pat. No. 6,786,817, inventor Gary R. Orendorff, and entitled “Vent Assembly”, which are each incorporated in their entirety herein by reference. 
    
    
     FIELD  
      The present invention relates to a wooden vent cover and also to a vent assembly with a wooden vent cover with an air flow regulator slidable relative to the wooden vent cover to control the flow of air through the vent cover.  
     BACKGROUND  
      Wooden vent covers with fixed vanes which each have parallel major vane surfaces are known. In one known form of wooden vent cover, major vane surfaces are all oriented at twenty-seven and one-half degree (27½°) in either direction from vertical when the vent cover is positioned in a horizontal orientation. Thus, these vane surfaces are either at sixty-two and one-half degrees (62½°) or one hundred and seventeen and one-half degrees (117½°) from horizontal. Rectangular vent covers of this construction are known with all of the vanes positioned at the same angle. In another known form, the vent cover defines side-by-side rectangular openings at either side of a central divider. A first set of vanes which have major surfaces at twenty-seven and one-half degrees (27½°) in a first direction from vertical are supported in one of the side-by-side openings. In addition, a second set of vanes are supported in the other of the side-by-side openings with their major vane surfaces oriented at twenty-seven and one-half (27-½°) degrees in the opposite direction from vertical.  
      Stamped metal vent covers are also known which have vanes with major surfaces at an angle which varies moving from the center of the vent cover to the ends of the vent cover. For example, with the vent cover in a horizontal orientation, these vanes may have major vane surfaces which are vertical (0 degrees) at the center of the vent cover with an increasing angle from vertical moving toward the outer ends of the vent cover, such as thirty degrees (30°) or more from vertical for the vanes which are furthest from the center. Vent covers of plastic with these variable angled vanes are also known.  
      It is also known to use an air flow regulator in combination with a vent cover to control the flow of air from a vent and through the regulator and vent cover. U.S. Pat. No. 6,227,962 to Orendorff, which is incorporated by reference herein in its entirety, discloses an air flow regulator of the type which has louvers which pivot between closed and various open positions and which is supported beneath the vent cover.  
      Other vent assemblies with vent covers and air flow regulators are designed to have a sliding air flow regulator which is supported to slide relative to the vent cover. For example, U.S. Pat. No. 5,472,380 to Sarazen, Jr. et al. is understood to illustrate a construction in which a register or vent cover slidably receives a slide grill. The register defines a groove between the underside of vanes of the register and the upper surface of ridges formed in opposed sidewalls of the register. A handle, or tab, which can be integrally formed as part of the slide grill, extends upwardly in the space between two vanes of the cover so that it can be used to slide the grill.  
      U.S. Pat. No. 2,930,309 to Prager is understood to disclose an adjustable ventilator which has a vaned louver plate on one surface of a wall. A slidable plate assembly is located at the opposite side of the wall. The slidable plate assembly includes a cover having a plurality of openings which overlie a slide plate. Handles extend through slots in the cover and are used to slide the slide plate to selectively block or open the openings through the cover.  
      Although constructions of this type are known, a need exists for an improved vent cover and vent assembly.  
     SUMMARY  
      The present invention is directed toward new and unobvious aspects of a wooden vent cover and also to aspects of vent assemblies comprising an improved wooden vent cover in combination with an air flow regulator, alone and in various combinations and subcombinations with one another. The invention is not limited to a wooden vent cover, or to a wooden vent cover in combination with an air flow regulator, which includes all of the various components described below in connection with illustrated embodiments.  
      In this disclosure, the term “wooden vent cover” means a vent cover which is formed of wood components, but also includes vent covers of wood components with fasteners (e.g., brads) or inserts of other materials, and/or vent covers of wood components which are secured together by adhesive with or without other fasteners or inserts components. Desirably, there are no such inserts or fasteners and the wood components are secured together solely by adhesive.  
      In accordance with one embodiment, a wooden vent cover has a plurality of air flow openings at least some of which are defined between fixed wooden vanes. Desirably, these vanes each have opposed major first and second surfaces which are parallel to one another. By major surface, it is meant a surface which extends at least along one-half of the vane and more desirably substantially along the entire surface at one side of the vane. This does not preclude, for example, the inclusion of a bevel or inclined surface at one or both sides of a vane which intersects a major surface of the vane. Such a beveled surface, for example, may be positioned along the upper edge of the vane near the front surface of the vent cover. The front surface refers to the surface of the vent cover which is exposed when the vent cover is positioned to overlay a vent opening. The front surface of the vent cover may define a plane which is generally horizontal when the vent cover is oriented in a horizontal orientation. The major vane surfaces are most desirably at an angle varying from about twelve degrees (12°) to about seventeen degrees (17°) from either side of vertical (73° to 78° or about 102° to 107° from horizontal) when the vent cover is in a horizontal orientation. A particularly desirable vane angle is sixteen degrees (16°) either side of vertical (74° or 106° from horizontal) when the vent cover is in a horizontal orientation. This angle may also be referenced from a plane which is perpendicular to a plane defined by the front surface.  
      In accordance with one aspect of an embodiment, all of the major vane surfaces of a vent cover are fixed at the same angle. The vent cover may comprise a wooden vent body which defines a central opening with the vanes being wooden and positioned within the vent opening and with the major vane surfaces at the desired angle.  
      In another form, the major vane surfaces at one side of a central vent cover location are angled in one direction from vertical, when the vent cover is in a horizontal orientation, and the vane surfaces at the opposite side of the central portion are angled at the opposite angle from vertical. Desirably, all of the major vane surface angles at a first or one side of the central portion of the vent cover are at the same first angle and all of the major vane surfaces at the second or opposite side of the central portion are at the same second angle. The first and second angles can also desirably be of the same magnitude from vertical, or from a plane perpendicular to a plane defined by the front surface, but in opposite directions from vertical. A particularly desirable angle is sixteen degrees (16°) from vertical.  
      A vent assembly may comprise a wooden vent cover of such construction in combination with an air flow regulator. Although the air flow regulator may be of any suitable form and may be permanently or detachably mounted to the vent cover, in one specific embodiment, the air flow regulator is slidable relative to the wooden vent cover from a first closed position in which the air flow regulator substantially blocks the flow of air through the air flow openings to second open positions in which air flow paths are provided through the air flow regulator and air flow openings. By substantially blocking the flow of air, it is meant that the air flow is severely restricted as some air flow leakage or minimal air flow may still take place even though the air flow regulator is in the closed position. One or more open positions may be provided with the air flow being less restricted by the air flow regulator as the air flow regulator is moved toward its most open position.  
      In one specific embodiment, one or more couplers, which may be detachable, interconnect the air flow regulator and the vent cover at a first end portion of the vent assembly. In addition, one or more such couplers interconnect the air flow regulator and the vent cover at a second end portion of the vent assembly. These exemplary couplers permit sliding of the air flow regulator relative to the vent cover. These couplers may be detachable without the use of tools. As a specific example, these couplers may each comprise at least one first coupler portion coupled to the air flow regulator and at least one second coupler portion frictionally coupled to the wooden vent cover. The first coupler portion of each coupler may support the air flow regulator. The at least one second coupler portion may be inserted into a coupler receiving opening in the wooden vent cover, such as into an air flow slot between wooden vanes of a wooden vent cover. The second coupler portion may frictionally engage the boundaries defining the coupler receiving opening, such as the major surfaces of the walls of the air flow directing wooden vanes, to retain the air flow regulator in a coupled relationship to the wooden vent cover.  
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a perspective view of one form of a wooden vent cover assembly in accordance with an embodiment of the present invention.  
       FIG. 2  is a bottom view of a vent assembly with a wooden vent cover in accordance with a second embodiment.  
       FIG. 3  is a view similar to  FIG. 2  with a slide member or air flow regulator shown in a fully opened position in the upper portion of  FIG. 3  and in a closed position in the lower portion of  FIG. 3 .  
       FIG. 4A  is a transverse sectional view of a portion of the vent assembly of  FIG. 3  taken along line  4 A- 4 A of  FIG. 3 .  
       FIG. 4B  is a transverse sectional view of a portion of the vent assembly of  FIG. 3  taken along line  4 B- 4 B of  FIG. 3 .  
       FIG. 5  illustrates one form of actuator for shifting the air flow regulator between open and closed positions with the actuator shown in an air flow regulator open position in  FIG. 5 .  
       FIG. 6  is similar to  FIG. 5  with the actuator shown in an air flow regulator closed position in  FIG. 6 .  
       FIG. 7  is a perspective view of the actuator embodiment shown in  FIGS. 5 and 6 .  
       FIG. 8  is a side elevational view of the actuator of  FIG. 7 .  
       FIG. 9  illustrates a vent assembly with one form of couplers for coupling an air flow regulator or slide member to a vent cover.  
       FIG. 10A  is a side elevation view of one of the couplers of  FIG. 9 .  
       FIG. 10B  is a side elevation view of another of the couplers of  FIG. 9 .  
       FIG. 11  is a front view of one of the couplers of  FIG. 9 .  
       FIG. 12  is a bottom plan view of the vent cover and air flow regulator assembly of  FIG. 1 .  
       FIG. 13  is a schematic sectional view illustrating the installation of a coupler.  
       FIG. 14  is a transverse sectional view, taken along line  14 - 14  of  FIG. 12 .  
       FIG. 15  is a longitudinal sectional view of the vent assembly of  FIG. 12 , taken along line  15 - 15  of  FIG. 12  and with the vent assembly open.  
       FIG. 16  is like  FIG. 15  except with the vent assembly closed.  
       FIG. 17  illustrates a vent assembly usable at a corner location between a floor and wall of a building.  
       FIG. 18  is a sectional view of the vent assembly of  FIG. 17 , usable in a corner application.  
       FIG. 19  schematically illustrates the spread and throw through vent openings having major vane surfaces at a variety of angles.  
       FIG. 20  schematically represents the spread and throw of a vent cover with vane major surfaces at an angle of sixteen degrees from vertical.  
       FIG. 21  schematically represents the data points at which the air flow has decreased to 50 feet per minute along radial lines at 22 degrees, 45 degrees and 78 degrees for various vane major surface angles from vertical.  
       FIG. 22  is a graph of the sum of the spread and throw versus the major vane surface angle from vertical. 
    
    
     DESCRIPTION OF ILLUSTRATED EMBODIMENTS  
       FIG. 1  illustrates one form of vent assembly comprising a wooden vent cover  10 . The illustrated wooden vent cover has first and second major opposed surfaces  12 , 14  with a plurality of vent openings, some being indicated at  16 , which extend between surfaces  12 , 14  and through which air may flow. The illustrated wooden vent cover  10  has an inward step around its perimeter, as indicated at  18 , with an overhanging projecting rim portion  20  about the perimeter of the wooden vent cover. As can be seen in  FIG. 4A , the undersurface of rim  20  may engage the upper surface  21  of a portion of a floor  22  or other support through which a duct opening  24  extends. The step  18  allows the wooden vent cover to be inserted downwardly into the duct opening.  
      The air flow openings  16  in the illustrated wooden vent cover may be of any configuration and desirably comprise elongated slots which are spaced apart from one another by respective wooden vanes. Two of these vanes are indicated at  26  in  FIG. 1 . These vanes have wall surfaces which bound and define the respective sides of the air flow slots  16  and are typically angled to assist in directing air as it flows outwardly from the vent assembly. The vanes  26  extend between respective wooden side members or portions  28 , 30  of the illustrated vent assembly. Side members  28 , 30 , in this example, bound and define the respective ends of the air flow slots  16 . First and second wooden end members or portions  32 , 34  extend between the respective side members  28 , 30  at the respective ends of the wooden vent cover and complete a wooden frame or body around the perimeter of the wooden vent cover. A central wooden crosspiece or divider  36  is also provided approximately midway between the respective ends of the wooden vent cover  10 . The crosspiece  36  also passes between side members  28 , 30 . The air flow slots  16  toward the right side of crosspiece  36  in  FIG. 1  may be angled to direct air away from the crosspiece. The slots at the opposite side of the crosspiece are typically angled in the opposite direction. One of these air flow slots, in  FIG. 1  the endmost air flow slot indicated at  16   a  to distinguish it from the other slots  16 , has a vent assembly actuator indicated generally at  40  positioned, in this example, at least partially therein. Actuator  40  is used to shift the position of an illustrated form of air flow regulator such as a slide member. The air flow regulator is slidably coupled to the wooden vent cover  10  so as to be slid to various positions to control the flow of air from the duct and through the air flow slots  16 . Alternatively, although less desirable, other forms of air flow regulators may be used, such as disclosed in U.S. Pat. No. 6,227,962.  
      In the embodiment of  FIG. 1 , the vent cover frame is comprised of side pieces  28 , 30  and end pieces  32 , 34 , together with a divider  36 . The frame and divider define two side-by-side openings which, in the illustrated embodiment, are rectangular in configuration. A first set of vanes  26  are supported by respective side pieces  28 , 30  at a fixed location and extend within the opening at one side of the divider  36 , for example, at the left side of the divider shown in  FIG. 1 . A second set of vanes  26  are supported by the side pieces  28 , 30  and extend within the opening at the opposite side of the divider  36  from the first set of vanes, for example at the right side of the divider  36  shown in  FIG. 1 . In the embodiment of  FIG. 9 , no central divider is provided.  
      With reference to  FIG. 16 , a plurality of the slots  16  are defined between respective adjacent wall surfaces of adjacent vanes. Consider for example the vanes labeled  26   a ,  26   b  and  26   c  in  FIG. 16 . In the example under discussion, these latter three vanes are part of the first set of vanes. Each of these vanes  26   a ,  26   b  and  26   c  have major opposed vane surfaces  104 , 106  which are desirably planar and which are most desirably parallel to one another. By major vane surface, it is meant that a majority and most desirably substantially all of the respective side surface of the vane. It should be noted that for ornamentation reasons (to make the vane appear thinner when looking down from above), a bevel or chamfer is provided at the upper end of the wall surface  104 . Although not required, this beveled surface may be at an angle of, for example, 53 degrees from a plane which contains wall surface  104 . One of these beveled surfaces is indicated at  27  for vane  26   a  in  FIG. 16 .  
      The top or front surface  12  of the vent cover in  FIG. 16 , although not necessarily planar, can be used as a reference surface for a plane  107  which can be defined by surface  12 . For example, plane  107  may be tangent with the majority of surface  12  if surface  12  is primarily planar. Alternatively, for example, an average or other approximation of points on surface  12  may be used to define a reference plane. In addition, in  FIG. 16 a  reference plane  109  is shown perpendicular to the plane  107 . In the embodiment shown, plane  109  is perpendicular to a planar portion of front surface  12  and extends vertically when the vent cover is oriented in a horizontal orientation as shown in  FIG. 16 . A similar plane  109 ′ is shown to the right side of center piece  36  in  FIG. 16 .  
      Desirably, major surface  106  is at an angle varying from about twelve degrees (12°) to about seventeen degrees (17°) from plane  109 . The term “about” is intended to encompass less than a one degree variation, such that a range of from about twelve degrees (12°) to about seventeen degrees (17°) is from greater than eleven degrees (11°) to less than eighteen degrees (18°). In  FIG. 16 , for vanes  26   a ,  26   b  and  26   c , the angle A thus is desirably in this range and more desirably is from twelve degrees (12°) to seventeen degrees (17°) counterclockwise from plane  109 . In addition, major surfaces  106  for vanes  26   d ,  26   e  and  26   f  (exemplary vanes at the right side of divider  36  in  FIG. 16 ) are also desirably within this about twelve degrees (12°) to about seventeen degrees (17°) range and are more desirably from twelve degrees (12°) to seventeen degrees (17°) from plane  109 ′, but in this case in a clockwise direction from plane  109 ′. As an alternative way of describing the angle of major surfaces  106 , angle B between plane  107  and a plane defined by major surface  106  is from about seventy-three degrees (73°) to about seventy-eight degrees (78°) or angle C from plane  107  to the plane defined by major surface  106  is from about one hundred and two degrees (102°) to about one hundred and eight degrees (108°), (these latter angles B and C being from horizontal in  FIG. 16 ). Angles C and B, for vanes  26   d ,  26   e  and  26   f  are in the same range. A particularly desirable vane angle A is sixteen degrees (16°) either side of vertical (seventy-four degrees (74°) or one hundred and six degrees (106°) from horizontal). Desirably, the major surfaces  104  of the vanes are at an angle which is selected to also be in the range of from about twelve degrees (12°) to about seventeen degrees (17°) either side of vertical, more desirably twelve degrees (12°) to seventeen degrees (17°) and with sixteen degrees (16°) either side of vertical being a particularly desirable angle. In addition, most desirably, surfaces  104  and  106  are parallel to one another and thus these two major surfaces of the same vane have the same angle. In addition, in the particularly desirable embodiment of  FIG. 16 , all of the major surfaces of the vanes at one side of the divider, e.g., the first set of vanes, are at a first angle and all of the major surfaces of the vanes at the opposite side of the divider are at the same angle but in the opposite direction from vertical.  
      In addition, the surface  111  adjacent to surface  104  of the left-most vane  26   g  in  FIG. 16 , is desirably at the same angle as the surfaces  106  of the set of vanes at the left side of the divider in this figure. Also, the surface  115  at end piece  32  adjacent to the right-most vane  26   h  in  FIG. 16 , is desirably at the same angle as the angle of the surfaces  106  of the set of vanes at the right side of the divider  36  in  FIG. 16 . In addition, the surface  113  at divider  36 , adjacent to vane  26   c , desirably has the same angle as the surface  104  for the vane  26   c . In addition, the surface  115  of divider  36 , at the right hand side of the divider in  FIG. 16 , desirably has the same angle as the surface  106  of the vane  26   d  adjacent to the divider  36 .  
      In the  FIG. 9  embodiment, which lacks a center divider, the respective frame components of the vent cover define a single central opening, which may be rectangular. The vanes  26  extend within this single opening and are positioned at a fixed location. Vanes  26   i  and  26   j  are specifically identified in this figure and have respective major wall surfaces  104  and  106 . These major vane surfaces  104 , 106  may have the same configuration and are desirably at the same angle as the corresponding vane surfaces for the vanes described above in connection with  FIG. 16 . For example, the major surfaces  104  and  106  of vanes  26   i  and  26   j  desirably are in the same range as the major vane surfaces of the vanes  26   d  and  26   e  in  FIG. 16 . Thus, angles A, B and C in  FIG. 9  are desirably identical to the described angles and ranges set forth above in connection with the description of  FIG. 16 .  
       FIG. 2  illustrates the underside of a form of vent assembly having a wooden vent cover  10  like that shown in  FIG. 1  except that the wooden vent cover is of a shorter length than that shown in  FIG. 1  and lacks the central crosspiece  36 .  FIG. 2  illustrates one form of an air flow regulator  50  which is slidably coupled to the wooden vent cover  10 . In the form shown, the air flow regulator comprises a slide member  54  which may comprise a generally planar plate  55  having opposed first and second major surfaces  56 , 58  (see  FIG. 4A ). In the illustrated form in  FIG. 2 , air flow regulator  50  is rectangular and has four corners. In the embodiment shown, the surface  56  is an upper surface of plate  54  and is positioned adjacent to the surface  14  of the wooden vent cover  10 . In addition, the surface  58  is spaced away from the surface  14  and is exposed to view in the embodiment of  FIG. 2  when looking at the rear or underside of the vent assembly. The plate  55  has first and second reinforcing side flanges  60 , 62 . The respective flanges  60 , 62  project outwardly away from the surface  58  and away from the wooden vent cover surface  14 . The illustrated slide member  54  has a plurality of spaced apart air flow openings extending between the surfaces  56 , 58  with some of these openings being indicated at  66  in  FIG. 2 . Openings  66  may take any convenient configuration. In the illustrated form, these openings comprise elongated rectangular slots extending transversely relative to the longitudinal axis of the plate  55 . In  FIG. 2 , the slide member  54  is shown positioned in a fully open position. In this position, the slots  66  are aligned with corresponding air flow openings  16  of the wooden vent cover. Consequently, minimal resistance is provided to the flow of air upwardly through the slide member and wooden vent cover. In contrast, when slide member is shifted to a fully closed position, the portions of the slide member between the openings  66  are aligned with the air flow openings  16  through the wooden vent cover. This substantially blocks the flow of air through the wooden vent cover. Intermediate open positions are also possible depending upon the extent of the alignment of openings  66  with openings  16 . The upper portion of  FIG. 3  shows the vent assembly of  FIG. 2  with the slide member  54  in the open position. This corresponds to the position shown in  FIG. 2 . In contrast, the lower portion of  FIG. 3  illustrates the vent assembly of  FIG. 2  with the slide member  54  shifted to the closed position.  FIG. 4A  shows a portion of the vent assembly of  FIG. 3  in the open position.  FIG. 4B  shows a portion of the vent assembly of  FIG. 3  in the closed position.  
       FIG. 2  also illustrates one form of an actuator engaging portion  70  of the slide member  54 . As can be seen in  FIGS. 5 and 6 , in connection with one specific form of actuator  40 , the actuator engaging member  70  comprises a lower portion  72  spaced below the surface  58  and coupled by a downwardly projecting flange portion  74  to the main body of the slide member  54 . Portion  72  of actuator engaging member  70 , in the form shown, is provided with an opening or slot  76  for receiving a toe or tab portion  80  of the actuator embodiment shown in  FIGS. 5, 6  and  7 .  
      Although not required, for economic efficiency, slide member  54  may be formed out of a single sheet of material by simply cutting and bending the sheet in an appropriate manner. As a specific example, the slide member  54  may be formed of 18 to 20 gauge C.R. low carbon steel. The various embodiments are not limited to the form of slide member shown by member  54  or to the form of actuator engagement mechanism shown at  70 . For example, a pin or handle may project upwardly from the air flow regulator where it can be grasped and moved to slide the air flow regulator relative to the wooden vent cover. The pin or handle typically would slide along a slot in the wooden vent cover. Other actuator mechanisms may also be used.  
      Various forms of couplers may be used to slidably mount the slide member  54  to the wooden vent cover  10 . Screws and other fasteners may be used, for example. However, detachable couplers, particularly those which require no tools for installation, are particularly desirable. U.S. Pat. No. 6,227,962 illustrates one suitable form of coupler for a different form of air flow regulator.  
      As another more desirable example, in accordance with an illustrated embodiment, a first set of plural couplers, such as at least two spaced apart couplers is positioned adjacent to a first end portion of the wooden vent cover. The couplers of the first set are each inserted into a respective associated coupler guide opening (described below) and into engagement with the wooden vent cover so as to slidably couple the air flow regular to the wooden vent cover. Desirably at least one coupler of the first set is positioned adjacent to a first corner of the air flow regulator at the first end portion of the wooden vent cover. In addition, desirably at least one other coupler of the first set of couplers is positioned at the opposite corner of the air flow regulator and at the first end portion of the wooden vent cover. These couplers slidably couple the air flow regulator to the wooden vent cover. In addition, a second set of plural couplers, such as at least two spaced apart discrete couplers are positioned adjacent to a second end portion of the wooden vent cover and opposite to the first end portion of the wooden vent cover. Each of the couplers of the second set are inserted through an associated coupler guide opening and into engagement with the wooden vent cover. Desirably at least one coupler of the second set of couplers is positioned adjacent to a third corner of the air flow regulator at the second end portion of the wooden vent cover. In addition, desirably a second coupler of the second set of couplers is positioned adjacent to the opposite corner of the air flow regulator at the second end portion of the wooden vent cover. The second set of couplers also slidably couple the air flow regulator to the wooden vent cover. In a desirable form, each coupler comprises at least one first coupler portion coupled to and supporting the air flow regulator so as to permit sliding movement of the air flow regulator or slide member. In addition, each such coupler desirably comprises at least one second coupler portion which frictionally engages the wooden vent cover. As a specific example, second coupler portions which are compressed in at least one direction within coupler receiving openings of the wooden vent cover may be used. As a more specifically desirable example, the coupler receiving openings in the wooden vent cover may comprise one or more of the air flow openings. A particularly desirable form of coupler is a clip. As a specific example, the couplers may be made of a resilient band of material, such as of spring steel, bent into an appropriate shape.  
      In the embodiment shown in  FIG. 2 , a first set of two spaced apart couplers, each in the form of a clip  100 , are positioned at a first end portion of slide member  54 . In addition, a second set of couplers  102 , each in the form of a clip, are positioned at the opposite end portion of slide member  54 . The couplers  100 ,  102  in the form shown are discrete clips that are spaced apart from one another. In the embodiment shown in  FIG. 2 , each coupler is adjacent to a respective one of the corners of the slide member  54 . Additional discrete couplers may be included in the first set and also in the second set, if desired.  
      The operation of the exemplary actuator  40  mentioned above will be best understood with reference to  FIGS. 5, 6 ,  7  and  8 . More specifically, with reference to  FIG. 7 , the actuator  40 , in the form shown, comprises a lever  84  having a first portion  86  which is coupled to the air flow regulator. More specifically, in the embodiment shown, the tab  80  projects from the lever first portion  86  for insertion into the opening  76  of actuator receiving portion  72  of the slide member. In addition, the illustrated lever  84  includes a pivot portion  88  which, as can be seen in  FIG. 5 , in the illustrated embodiment, is positioned at least partially within the slot  16   a  of the wooden vent cover. More specifically, pivot portion  88  in the illustrated embodiment is configured for positioning entirely within the slot between walls of adjoining portions of the wooden vent cover that define slot  16   a . In addition, lever  84  comprises a grasping portion  90  which projects from the pivot portion and generally away from the air flow regulator or slide member  54  when the vent assembly is assembled.  
      As can be seen in  FIGS. 5, 6  and  7 , the first or lower lever portion in the illustrated embodiment is not straight. In particular, the first lever portion  86  is bent, in this case, between the pivot portion and the tab  80 . In addition, a shoulder  92  is provided between tab  80  and the lever portion  86 . As can be seen in  FIGS. 5 and 6 , the shoulder  92  bears against the slot  76  as the actuator is operated.  
       FIG. 5  illustrates the slide member  54  in a fully open position. Lever  84  is pivoted in the direction indicated by arrow  94  to open the vent assembly. In contrast,  FIG. 6  illustrates the vent assembly in the closed position. The lever  84  is pivoted in the direction indicated by arrow  96  to close the vent assembly. As can be seen in  FIGS. 5 and 6 , curved exterior surfaces of the pivot portion  88  engage the walls defining slot  16   a  to guide this pivoting motion. In addition, with the configuration shown, as the actuator is pivoted toward its open position in the direction of arrow  94 , the distance d 1  between the pivot axis of pivot portion  88  and the undersurface  14  of wooden vent cover  10  increases. That is, the pivot axis is shifted closer to wooden vent cover surface  12 . In one specific configuration, the distance d 1  is 0.267 inches. In contrast, as the lever  84  of this configuration is shifted toward its closed position in the direction of arrow  96  in  FIG. 6 , the distance between the pivot axis of pivot portion  88  and surface  14  is decreased. This is indicated by d 2  in  FIG. 6 . With the specific example shown, d 2  may be 0.22 inch. Thus, in effect, one form of lever  84  includes a floating pivot which moves toward the upper surface  12  of the wooden vent cover  10  as the actuator is shifted toward its open position. This assists in maintaining the upper portion of lever  84  at a location where it is easier to reach for use in adjusting the position of the slide member  54 .  
      Although the dimensions of the lever form of actuator shown in  FIGS. 5, 6 ,  7  and  8  may vary, specific exemplary dimensions for a construction in which the distance between surface  58  of slide member  54  and the upper surface of engaging member  72  is 0.244 inch are as follows. The lettering and angle designations set forth below correspond to the lettering and angles used in  FIG. 8 .  
                                                   Example 1   Example 2                          θ = 25 degrees   θ = 25 degrees           L 1  = 0.110 inch   L 1  = 0.156 inch           L 2  = 0.401 inch   L 2  = 0.375 inch           L 3  = 0.250 inch   L 3  = 0.272 inch           L 4  = 0.358 inch   L 4  = 0.440 inch           L 5  = 0.104 inch   L 5  = 0.077 inch           L 6  = 0.138 inch   L 6  = 0.094 inch           T = 0.057 inch   T = 0.062 inch                      
 
      In addition, the width of the lever  84  may be 0.609 inch and width of the tab  80  may be 0.157 inch. The actuator lever  84  may be made of any suitable material and may, for example, be extruded of aluminum with the extrusion being separated into actuators of the appropriate width and with the tab  80  being formed by machining.  
      The clips  100 , 102  may take a number of forms. Desirable forms of clips  100 , 102  are illustrated in  FIGS. 9, 10A ,  10 B, and  11 . With reference to  FIG. 9 , the air flow openings  16 , 16   a  through wooden vent cover  10 , as mentioned above, are defined by vanes  26  and respective portions of the end pieces  32 , 34 . More specifically, the air flow openings are defined by respective spaced apart and adjacent walls  104 , 106  of these components. The walls are angled relative to horizontal such as indicated in  FIGS. 9 and 16  and as previously explained. The range of angles for surfaces  104 , 106  (e.g., about 12° to about 17° either side of vertical and more desirably 16° from either side of vertical) results in improved air flow throw and spread characteristics for a wooden vent cover. In addition, the walls  104 , 106  are spaced apart a distance V t  in  FIG. 9 , corresponding to the width of the air flow slots  16 . Although the dimensions of the air flow slots may vary, an exemplary V t  is 0.24 inch.  
      In this description, the term “throw” refers to the distance from the center of an outlet to a point in a mixed air stream where the highest sustained velocity of the mixed air stream has been reduced to a specified level. In addition, the term “spread” means the maximum distance measured parallel to the plane of the outlet, between the extremes of the terminal velocity envelope. In addition, the term “terminal velocity”, at an outlet, means the highest sustained velocity in the mixed air stream where the highest sustained velocity of the mixed air stream has been reduced to a specified level.  FIG. 19  illustrates actual tests and extrapolated results for a vent cover having vent openings with the surfaces  104 , 106  parallel to one another and configured as shown for the right hand vanes of  FIG. 16 . Actual air flow measurements were obtained for angles of the major surfaces  104 , 106  at eight degrees (8°), twelve degrees (12°), sixteen degrees (16°), twenty degrees (20°), and twenty-seven and one-half degrees (27½°). The results for angles that differ from these actual measured results were obtained by extrapolation. Thus, one-half of the total grill shown in  FIG. 16  is represented in these measurements. In addition, the velocity at the front surface of the grill was 500 ft./min. The terminal velocity was 50 ft./min. The throw is thus maximum distance in the vertical direction (assuming the vent cover was oriented horizontally) at which the terminal velocity was measured. Thus, for the twelve degrees (12°) angled major surfaces  104 , 106  vent cover of  FIG. 19 , the throw was 52.557 inches. In addition, the spread was the maximum width for which the terminal velocity was measured in a plane parallel to the front surface of the vent cover from the center of the divider of the vent cover to the location of the terminal velocity. Thus, in the twelve degree (12°) major surface angled example, for one-half of the grill, the spread was 24.823 inches. The total spread would be expected to be doubled for an entire grill.  FIG. 20  illustrates an example where the major surfaces  104 , 106  were at an angle of sixteen degrees (16°). This figure illustrates planes with respect to a coordinate system ranging from zero degrees (0°) (horizontal) to ninety degrees (90°) (vertical). Planes at twenty-two degrees (22°), forty-five degrees (45°), fifty-six degrees (56°), sixty-seven degrees (67°), and seventy-eight degree (78°) planes are illustrated.  
      Air flow data was collected to establish data points at which the terminal velocity had decreased from initial velocity of 500 ft./min. at the front surface of the vent cover to 50 ft./min. along radial lines at twenty-two degrees (22°), forty-five degrees (45°), fifty-six degrees (56°), sixty-seven degrees (67°), and seventy-eight degrees (78°) and for respective major surface vane angles at eight degrees (8°), twelve degrees (12°), sixteen degrees (16°), twenty degrees (20°), and twenty-seven and one-half degrees (27½°). These data points are shown in  FIG. 21 . For example, along the 56° radial line, at a vane major surface angle of 16°, the data point was about 52 inches where the terminal velocity had been reduced to 50 feet per minute. Through analysis, it was determined that the position of the data point along the fifty-six degree (56°) radial (the radial distance to the data point from the origin) appeared to have the greatest affect on the spread of the air flow pattern. In addition, the radial distance from the origin to the data point along the sixty-seven degree (67°) radial appeared to have the greatest affect on the throw. In extrapolating between the gathered data points, it was assumed that the air flow pattern transitioned smoothly from one form to another as the vane angle was changed.  FIG. 21  thus represents a plot of the extrapolated and collected data point positions (the measured data points being circled in this figure) along a radial against the change in vane angle.  
      Looking at the sixteen degree (16°) vane angle, it is apparent from  FIG. 21  that this vane angle provides an optimized combination of spread and throw. A vane angle near the highest point on the fifty-six degree (56°) radial, near a vane major surface angle of 16 degrees (16°), provides close to the maximum spread (one-half the total expected spread being represented by this data). The corresponding value for major surface angles of sixteen degrees (16°) on the sixty-seven degree (67°) curve, is within about two and one-half inches of the maximum throw. A vane angle of two degrees (2°) smaller yields the maximum throw (by about plus five percent) and a significant decrease in spread (approximately minus seventeen percent). A vane angle of two degrees (2°) larger yields a slight reduction in spread and a significant decrease in throw (by about seventeen percent (17%)).  
      With reference to  FIG. 22 , the sum of one-half of the spread plus the throw for various vane angles is shown. For vane angles from slightly less than twelve degrees (e.g., 11.9−°) to slightly over seventeen degrees (e.g., 17.3°), the sum of spread and throw was greater than seventy-seven inches. One can also see that there is a significant degradation of performance at major surface vane angles below twelve degrees (12°) and above seventeen degrees (17°). Thus, an optimized vane angle is desirably from about twelve degrees (12°) to about seventeen degrees (17°) with a more desirable range being from twelve degrees to seventeen degrees (17°) and a most desirable angle being sixteen degrees (16°).  
      The clips  100  may be identical to one another or, although less desirable, they may be of a different configuration. In addition, the clips  102  may be identical to one another or, although less desirable, they may also be of a different configuration. In the example of  FIG. 9 , clips  100  are identical to one another and clips  102  are also identical to one another. Clip  100  will be described in detail in connection with  FIGS. 10A and 11 . Clip  102  is shown in  FIG. 10B . The illustrated clip  100  comprises a first coupler portion which in this example comprises air flow regulator support portion  110 . As can be seen in  FIG. 9 , support portions  110  support the slide member  54  from below. That is, portions  110  of the respective clips  100 ,  102  are typically positioned adjacent to surface  58  of the slide member  54 . In this example, there is no need for the clips  100  or the clips  102  to be interconnected. Also, by making support portion  110  of a band of material having a width and flat upper supporting surface, enhanced stable support of slide plate  54  is provided. In addition, the illustrated clip  100  comprises a coupler portion  120  comprised of at least two coupler sections  114 ,  118 . These coupler sections have a cross-sectional dimension in one direction (the direction corresponding to the distance V t ) which is greater than the distance V t . Consequently, when the coupler portion  120  is inserted into a receiving air flow slot  16  or  16   a , the coupler portion  120  is compressed in at least one dimension for wedging or frictional fit within the receiving opening. As a result, the slide member  54  is held in place without requiring tools to interconnect the slide member to the wooden vent cover in this example. The illustrated coupler portion  120  is comprised of an upwardly extending leg portion  114 , a curved end portion  116 , and a downwardly extending leg portion  118 . By making portions  114 ,  118  to have an extended width, e.g. width w, greater bearing of the coupler  120  against the walls of the air flow slot is achieved.  
      Referring back to  FIG. 2 , at the location where clip portion  110  extends upwardly or transitions to the portion  114 , an associated guide opening is provided through the slide member  54 . These guide openings may comprise respective slots having longitudinal axes extending in a direction which is parallel to the direction of travel of the slide member  54  relative to the wooden vent cover  10 . These slots are desirably of a width which is slightly wider than the width of the illustrated clips. Exemplary slots are indicated at  124  in  FIG. 2 .  
      Desirably, the angle α ( FIG. 10A ) between support portion  110  and leg portion  114  is less than the angle C ( FIG. 9 ). Consequently, as can be understood from  FIG. 9 , when the clip is installed (e.g., clip  100 ), an upwardly directed biasing force is exerted by the spring clip against the slide member  54 . For example, in  FIG. 10 , the angle α may range from 60 to 80 degrees with 70 degrees being a specifically desirable example for the illustrated wooden vent cover. Thus, the angle α in  FIG. 10A  is desirably an acute angle. In  FIG. 10B , the corresponding angle α′ is an obtuse angle. The angle α′ may range from 91 to 111 degrees with 101 degrees being a specifically desirable example for the illustrated wooden vent cover. The angle β between leg portions  114 ,  118  is also, in the  FIG. 10  form, desirably an acute angle and is selected such that adequate biasing forces are provided against the walls of a slot into which coupler section  120  is inserted. As a specific example, β may range from 30 to 50 degrees, with 40 degrees being a specifically desirable example. The clip  100  in this form holds the slide member securely in place against the undersurface  14  of the wooden vent cover while still allowing the desired sliding movement. These clips  100 , 102  are of a simplified construction and in the desirable form shown, can be formed from a band of material by making only two bends in the material. Although less desirable, the clips may be of wire or other materials which are formed in an appropriate shape. In this illustrated example of clip  100 , the distal end of leg portion  118  hangs up on the wall of the vane and hold the slide member in place. Although less desirable, additional bends can be included in the clip.  
      Although variable, in one specific illustrative example, the dimensions of a specific clips  100 ,  102  are as follows: 
          α=70 degrees for clip  100      α′=101 degrees for clip  102      β=40 degrees     R=0.04 inch radius of curvature     I 1 =0.31 inch     I 2 =0.38 inch     I 3 =0.38 inch     w=0.13 inch        

      The length I 1 , is desirably slightly greater than the distance V t  between the walls of the air flow slot. The width w may vary and in a desirable form is at least five to ten times the thickness of the material used to form the clip. A resilient band of material, such as a rectangular strip of 0.016 inch thick S.S.TY.301 full hard stainless steel may be used for the clip.  
       FIGS. 12-16  illustrate an alternative embodiment of vent assembly with a wooden vent cover. In these figures, corresponding components, even if they differ somewhat in configuration, have been given the same numbers as in the previously described embodiments. The slots  124  may be of a different configuration from those shown in this construction. For example, the slots  124  at the end of the slide member  54  adjacent to actuator engaging portion  70  may be open at one end.  
       FIG. 13  schematically illustrates the installation of a clip to couple the slide member  54  to the wooden vent cover. A dashed lined member  118  schematically shows the position of leg section  118  if it were not bent by the wall of slot  16  as it is inserted to the solid line position indicated in  FIG. 13 .  FIG. 15  shows the slide member  54  in an open position while  FIG. 16  shows the slide member in a closed position.  
       FIGS. 17 and 18  illustrate one form of an embodiment of a wooden vent cover of a vent assembly which is suitable for a corner application. Given the low profile coupling and actuator configurations which may be used in accordance with embodiments described above, relatively little clearance is required to accommodate the vent assembly in such a corner application. By low profile, it is meant selecting components which project rearwardly from the wooden vent cover a reduced amount. In one specific example, the side portions  28 , 30  of the wooden vent cover  10  are beveled at  170 , 172  a desired amount for the particular application in question. For example, these edges may be beveled at 45 degree angles. As a result, edge  172  conforms to the configuration of a floor or other support  173  while edge  170  corresponds to the shape of a wall or other structure  171 . A duct  175  is shown in communication with the space beneath the vent assembly of  FIG. 18 . The ends of the vent assembly in this embodiment may be closed by respective end members  180 ,  182  which may be triangular in shape. When installed, the lower edges of these end members may rest on the floor surface  173  while the upright edges of these end pieces may bear against the wall  171 .  
      The wooden vent covers of the embodiments of  FIGS. 12-19  have fixed wooden vanes with major surfaces  104 , 106  at vane angles and ranges as previously described.  
      A building may have a plurality of vent assemblies of the various embodiments illustrated and described above.  
      Although described in connection with several illustrative embodiments, it should be noted that the present invention is not limited to the specific configurations disclosed to illustrate the invention. The present invention is directed toward novel and unobvious aspects and method acts alone and in various combinations and subcombinations with one another. I claim as my invention all such variations as fall within the scope and spirit of the following claims: