Abstract: Disclosed is a cover for a tubular duct extending from a planar roof surface. The cover comprises a cap, a skirt and a closure. In use: the cap is disposed outwardly from said duct, to define a headspace outside said duct and an annular space surrounding the headspace; the skirt extends from the rim of the cap in surrounding, spaced relation to said duct; and the closure extends from the terminus of the skirt to said duct and is disposed in spaced relation to said surface. The skirt and closure have vanes formed therein. The vanes are oriented such that: precipitation driven by wind through the skirt into the interior of the cap is directed, as it passes through the skirt, towards the roof; and precipitation driven by wind through the closure into the interior of the cap is directed, as it passes through the closure, away from the duct.

Abstract: Disclosed is a cover for a tubular duct extending from a planar roof surface. The cover comprises a cap, a skirt and a closure. In use: the cap is disposed outwardly from said duct, to define a headspace outside said duct and an annular space surrounding the headspace; the skirt extends from the rim of the cap in surrounding, spaced relation to said duct; and the closure extends from the terminus of the skirt to said duct and is disposed in spaced relation to said surface. The skirt and closure have vanes formed therein. The vanes are oriented such that: precipitation driven by wind through the skirt into the interior of the cap is directed, as it passes through the skirt, towards the roof; and precipitation driven by wind through the closure into the interior of the cap is directed, as it passes through the closure, away from the duct.

Abstract: An exhaust vent cover for closing the exhaust vent when the exhaust vent is not in use is shown. The exhaust vent cover includes a peripheral flange for attaching the cover to a surface and a continuous hollow body extending upwardly from the flange and having an open front as well as an air passageway communicating with this open front. The continuous hollow body further includes an overhang extending beyond the open front, a grill covering the open front to prevent access to the inside of the continuous hollow body, and a valve located inside the hollow body across the air passageway. The exhaust vent cover also includes a sloped upper surface to prevent the valve from being blown open.

Abstract: This invention relates to an inlet valve assembly for central vacuum systems and the method of installing the same. In particular, this invention relates to an inlet valve assembly including an inlet face plate, a mounting plate, having a deformable mounting flange, and an electrical receptacle integrally formed with a high voltage wire. In some uses, the inlet valve assembly also can include a low voltage wire which can be used to complete a low voltage circuit to initiate a central vacuum motor. The mounting plate can accommodate the electrical receptacle in a temporary position and the inlet face plate can rear mount the receptacle into a locked position where the receptacle is securely attached to the inlet face plate. In this manner, the receptacle may be mounted to the inlet face plate even though one end of the high voltage wire is already wired into an electrical box.

Abstract: This invention relates to an inlet valve assembly for central vacuum systems and the method of installing the same. In particular, this invention relates to an inlet valve assembly including an inlet face plate, a mounting plate, having a deformable mounting flange, and an electrical receptacle integrally formed with a high voltage wire. In some uses, the inlet valve assembly also can include a low voltage wire which can be used to complete a low voltage circuit to initiate a central vacuum motor. The mounting plate can accommodate the electrical receptacle in a temporary position and the inlet face plate can rear mount the receptacle into a locked position where the receptacle is securely attached to the inlet face plate. In this manner, the receptacle may be mounted to the inlet face plate even though one end of the high voltage wire is already wired into an electrical box.

Abstract: A clamp is disclosed for securing pipe to a surface. The clamp comprises a body for retaining the pipe therein. The body has at least two ends and at least one of the ends is securable to the surface by a fastener. In one embodiment, the ends are in the form of outwardly extending flanges with preformed holes for fastening. The body also includes a clasp which is adapted to releasably secure an electrical wire to the clamp. In one embodiment the clasp is a resilient cantilever having a rest position and being biased towards said rest position upon being displaced therefrom.

Abstract: A skimmer-diverter assembly for use with swimming pools having water filtration and circulation systems. The skimmer-diverter assembly includes an elongated arm positioned adjacent the skimmer intake of the spool filtration and circulation system. A flow augmenting apparatus is used with the elongated arm to direct an augmented current flow along the arm to enhance the entrainment of debris and direct the debris toward the side wall of the pool and skimmer intake.

Abstract: A skimmer-diverter assembly for removing floating debris in a swimming pool has an alongated arm portion with a first flow diverter to establish a flow upwardly and inwardly along the upstream side of the arm, and a second diverter on the end of the arm to enhance the flow inwardly along the downstream side of the arm.

Abstract: A pipe or casing spider coaxially overies a base ring and is provided with a plurality of slips supported by a slip ring above the spider. The slip ring and slips are moved vertically by a plurality of pressure cylinders interposed between the base ring and slip ring. A support plate coaxially underlies the base ring and is provided with a radial latch tongue slidable toward and away from the axis of the spider for maintaining a tubular string coaxially aligned with the spider.