Abstract: A voltage indicating coupling for metal conduit systems to indicate the presence or absence of voltage on a wire enclosed by a section of electrical conduit for a grounded AC power distribution system. Through the use of two opposing rectifiers the National Electrical Code requirement that the entire metal conduit system be grounded is met. The voltage indicating coupling comprises a liquid crystal display (LCD), a static suppression resistor, two opposing rectifiers for grounding purposes, a plastic block housing and two clamping screws with corresponding wire terminals. At least one “hot” conductor enclosed by the section of electrical conduit is capacitively coupled to the conduit creating a complete circuit through the liquid crystal display (LCD), the static suppression resistor and the opposing rectifiers. The path around the circuit is completed by a ground connection on the grounded part of the conduit system, and the ground connection at the transformer.

Abstract: A caulking system for applying and maintaining a position of caulk between a pipe and a floor to provide a firestop around the pipe includes a pair of collar portions. Each of the collar portions is positioned around the pipe and engages a peripheral edge in a hole in the floor to maintain a position of the pipe with respect to the hole. The collar portions extend around the pipe when the collar portions are coupled to each other. A caulk is engaged by the collar portions to keep the caulk positioned around the pipe and positioned between the pipe and the floor. The caulk inhibits passage of air, liquid or fire between the floor and the pipe.

Abstract: A fitting is inserted into an opening in a wall. The fitting includes a ring portion where it extends through the opening. It also includes one or two end portions that extend axially outwardly from the ring portion. The ring portion has an inside diameter that is smaller than the inside diameters of the end portion or portions. The fitting is positioned within the wall openings. Then, an expansion tool is moved through the interior of fitting for the purpose of expanding the ring portion. The ring portion is expanded to such an extent that it makes a tight fit with the opening. Also, the degree of expansion may result in a cold working of the wall material surrounding the opening. The expansion tooling only expands the ring portion and does not exert a substantial expanding force on the end portions.

Abstract: A sewer line coupling device to facilitate attachment of a recreational vehicle sewer line to a fixed waste pipe. The coupling device comprising a main body having a second end for insertion into the waste pipe. A movable member is movable relative to the main body and a sealing sleeve is supported by the main body adjacent the second end. One end of the sealing sleeve is affixed to the main body while the other end is coupled to the movable member. When the movable member is moved in a first direction, a minimum dimension of the sealing sleeve is achieved to facilitate insertion into the waste pipe and, when the movable member is moved in an opposite direction, a maximum dimension of the sealing sleeve is achieved to facilitate formation of a seal with the waste pipe. A flange is supported by the main body between the first end and the second end thereof.

Abstract: An assembly includes a quick connect cartridge which is inserted into a port of a valve or manifold in a pneumatic system for coupling external fluid lines of the system to the valve or manifold. The components of the quick connect cartridge and the O-ring seal are mounted on the tubular shank of a plug. The plug is used as a shipping pin and is also used to install the components into a port of the valve or manifold. Normally, the plug is withdrawn from the port after the components are inserted in the port. If it is desired to keep the port closed after initial installation of the components, the plug may be retained in the port until it is time to connect the port. If it is desired to leave the port permanently closed, the plug remains in place. The plug can be an open plug allowing testing of the valve in which case a dust plug is provided for shipping puposes.

Abstract: A feedthrough assembly for a conduit has, as is known, a wall formed with a throughgoing passage extending along an axis and having a radially inwardly directed wall surface. An elastomeric adapter sleeve has an outer surface complementarily radially outwardly engaging the wall surface, an inner surface snugly surrounding and engaging a conduit passing axially through the passage, and an axially backwardly open and annular groove between the surfaces and of a predetermined radial width in a relaxed condition of the sleeve. A tightening ring of a radial dimension greater than the width of the groove fits so tightly in the groove as to press the sleeve radially outward against the surface of the passage and inward against the conduit. The ring is formed of at least two similar sector-shaped ring parts having the same radius of curvature as the groove and having ends provided with angularly interfitting formations.