Abstract: A prefabricated, modular, duct assembly comprising a main duct having an outer wall, an inner wall, a first end and a second end. A horizontal duct assembly extending through the main duct between the first end and the second end. A vertical duct assembly extending along the inner wall from the horizontal duct assembly to the first end.

Abstract: A device comprising an adjustable band configured to be installed around a pipe and a locking assembly disposed on the adjustable band.

Abstract: A flange cleat comprising a body having a first flange receiving portion and an immediately adjacent second flange receiving portion, a third flange receiving portion cooperatively disposed on the body opposite from the first flange receiving portion and the second flange receiving portion, the body having an elongate portion that extends from the third flange receiving portion, a flexible tab projecting from the elongate portion whereby the flexible tab can be depressed during installation, and the body being resiliently expandable during installation.

Abstract: An air diffuser is adapted to be fluidly connected to an air duct. The air diffuser comprises a face and a unitary valve assembly. The face comprises a number of openings separated by louvers, which are preferably of a fixed angular orientation. The unitary valve assembly comprises vanes that are rotatably attached to a body by a deformable web that is integral to the valve assembly body and the vanes. The vanes are adjusted by means of an adjustment arm that extends from each vane through the openings in the face. The unitary valve assembly is preferably constructed of a single piece of material that is shaped so that it will attach to the face. The valve assembly is unitary, requiring no assembly except to the face. The deformable webs are sized so as to give a high cycle life to the assembly, and allow the vanes to be fixedly adjusted.

Abstract: A coupler for interconnecting a damper blade shaft having a keyed end with an actuator is provided whereby movement of the actuator is imparted to the damper blade shaft via the coupler. The coupler comprises a socket adapted to receive the keyed end of the damper blade shaft in at least two angular positions and a connector adapted to receive a portion of the actuator. The damper blade shaft can thereby be indexed to any one of the at least two positions relative to the actuator without additional fasteners when the keyed end of the damper blade shaft is received in the socket.

Abstract: A retainer bracket for an electric heating assembly is provided with a pair of parallel and opposing side beams having longitudinal axes and at least one planar transverse support formed integral with the pair of side beams and extending between the pair of side beams. The transverse support preferably has a plurality of openings with longitudinal axes and the transverse support is disposed so that the axes of the openings are parallel to the longitudinal axes of the side beams. The plurality of openings are thereby each adapted to receive and retain an insulator without a separate fastener. A method of making the heating coil retainer bracket from a single web of material is also contemplated.

Abstract: An apparatus and method for compressing a flexible duct into a shipping container. The flexible duct is placed within a housing and compressed by a plate moving in the housing. As the duct is compressed, the duct is inserted into the container.

Abstract: An open coil electric heater comprising a rigid support frame composed of a pair of longitudinally extending, laterally spaced members, with cross members between and secured to the longitudinal members. The cross members carry ceramic insulator members which are detachably connected to the cross members. Each insulator member has an end formed with a slot at an acute angle to the side walls of the insulator member to pass a portion of a convolution of an electrical wire coil. Hook-like projections form a transverse indentation at the base of the slot to detachably hold the portion of the wire om the insulator member. The portion of the wire is secured to the insulator members in an expeditious manner and without the use of tools by twisting the wire portion so that the wire portion is aligned sufficiently with the slot to enable the coil to freely pass into said slot.

Abstract: A thermally powered change over diffuser for controlling the flow orientation of air discharged from a ceiling mounted duct outlet includes a pair of vanes pivotably mounted on a platform for scissor-wise movement between an open and a closed position, and a thermally responsive actuator. Discharge of cooled air from the duct causes the actuator to move the vanes together into the closed position, blocking the center of the flow path, and forcing the discharge air to exit in a substantially horizontal orientation. Discharge of heated air causes the actuator to move the vanes apart, into the open position, allowing warm air to flow vertically downwardly into a building space.

Abstract: An interconnection arrangement (100) is disclosed for structurally interconnecting together pipe segments (102, 104) with a coupling device (106). In one embodiment, the coupling device is a sleeve coupling (106) having an inner diameter larger than the outer diameters of the pipe segments (102, 104). A set of four clips (118) are employed, with each clip (118) having a lip (120) and a series of tines (126). The clips (118) are engaged with longitudinal edge surfaces of the sleeve coupling (106), and the pipe segments (102, 104) are telescoped into the coupling (106). The tines (126) of the clips (118) "bite" into the inner surface (114) of the sleeve coupling (106), and the outer surfaces (108) of the pipe segments (102, 104).

Abstract: An air register handle (10) for mounting in an air register arrangement (12) to adjust the volume and/or direction of air flow through the register (12). The handle (10) includes a bracket (22) adapted to extend forwardly of a front plate (40) of the register (12). The bracket (22) is integral with a straight portion (20) adapted to extend rearwardly through a slot (44) on one side of the front plate (40). Handle tabs (24) extend from the straight portion (20) in a plane skewed relative to the plane of the straight portion (20). An arcuate flat portion (26) located rearwardly of the straight portion (20) comprises two arcuate arms (29) forming a slot (28) opening toward the rear of the handle (10). The slot (28) is adapted to receive a pintle (56) connected to a link (54) which interconnects a set of adjustable louvers (52).

Abstract: An air deflector arrangement (100) is disclosed and adapted for use in ceilings and similar areas for selectively providing discrete air flow patterns in radial directions relative to the arrangement (100). The air deflector arrangement (100) comprises a perforated face (102) typically mounted in a downwardly-disposed configuration and coplanar with adjacent ceiling panels or the like. The face is latched or otherwise releasably connected to a somewhat frustum-shaped back panel (110) extending upwardly from the plane of the ceiling panels. A plurality of deflector blades (140) are pivotably secured to an eyelet fastener (160) connected at a central location on the face (102). Each of the deflector blades (140) is freely rotatable throughout a 360.degree. range of motion relative to each of the other blades. Selective blade configurations provide an infinite number of air flow patterns.