Abstract: A ventilator having a one-piece plastic base with integral tubular member having a through passageway for flow of an exhaust gas stream. The tubular member is preferably molded simultaneously with the base, rather than glued, so that the base and tubular member assembly comprise not only a sealed tubular member, but provide a single, seamless part. Thus, moist air cannot leak out of the air flow path between the interior and exterior of a wall or roof. The ventilator is also provided with a screen and a flapper type lid for the tubular member. The flapper lid seals the outer end of the tubular member against inflow of outside air at those times when there is no exhaust gas stream impinging against the flapper so as to keep the flapper in the open position. The ventilator may be provided in a variety of colors by pigmentation of the plastic to be molded into the ventilator.

Abstract: A foundation vent (20) for use with concrete forms (31 ) includes two frames that telescope together into a plurality of locking positions to allow the width of the vent to be changed to match the thickness of the concrete wall. The first frame (26) includes first walls (34) and a first flange (40). The first frame has a first inner end (36), and a first outer end (38). The first flange is disposed around a perimeter of the first outer end. The second frame (28) includes second walls (60) and a second flange (70). The second frame has a second inner end (66), and a second outer end (68). The second flange is disposed around a perimeter of the second outer end. A ridge (74) engages in channels (52, 58) defined by a plurality of shoulders (50, 54) disposed on the frames to allow the two frames to telescope together and to lock at various, predetermined widths. The ridge is disposed around a perimeter of the second inner end of the second frame. The ridge thus engages one of the channels.

Abstract: A foundation vent (20) for use with concrete forms (31) is disclosed. The vent includes two frames that telescope together into a plurality of locking positions to allow the width of the vent to be changed to match the thickness of the concrete wall. The first frame (26) includes first walls (34) and a first flange (40). The first frame has a first inner end (36), and a first outer end (38). The first flange is disposed around a perimeter of the first outer end. The second frame (28) includes second walls (60) and a second flange (70). The second frame has a second inner end (66), and a second outer end (68). The second flange is disposed around a perimeter of the second outer end. A ridge (74) engages in channels (52, 58) defined by a plurality of shoulders (50, 54) disposed on the frames to allow the two frames to telescope together and to lock at various, predetermined widths. The ridge is disposed around a perimeter of the second inner end of the second frame. The ridge thus engages one of the channels.

Abstract: A mounting shoulder (34) attached to an air duct fitting (20) for securing an air duct register (24) over the end of the fitting. The fitting protrudes through an opening (26) in a wall member (22). The mounting shoulder comprises an attachment strip (36), a floor plate (32), and three side walls (40, 42, 44) all formed from a single plate of metal having properly placed cuts and bends. The attachment strip (36) affixes the shoulder to the fitting and is attached to the fitting such that its lower edge (52) is flush with the lower edge of the fitting. The width of the attachment strip is substantially equal to the thickness of the wall member. The floor plate, to which the air duct register may be secured, is attached along one edge to the attachment strip and lies in a plane substantially parallel to the wall member. The three side walls extend in a direction away from wall member from edges of the floor plate.

Abstract: An improved system for attaching a connecting device to the end of a spirally wound corrugated pipe section is disclosed. A conventional connector element is used which includes a first cylindrical portion adapted to connect to a corresponding connector element and a second cylindrical portion adapted to be inserted into the end of the corrugated pipe section. The outer diameter of the second cylindrical portion is approximately equal to but no greater than the inside diameter of the corrugated pipe section. A collar having a cylindrical portion with an inwardly directed circumferential flange is fitted over the end of the pipe so that the flange is beyond the end of the pipe section. The cylindrical portion of the collar has an inner diameter approximately equal to but no less than the outer diameter of the corrugated pipe section.