Abstract: A containment system may include four different widths of panel assemblies, at least four different types of corner assemblies, various types of door assemblies, multiple types of three-way corners or ‘T’ intersections, multiple types of exhaust panel assemblies, multiple types of wall seal assemblies, and other components that form a modular system capable of adapting to various configurations using a minimal number of fasteners, brackets, and/or clamps. Each panel assembly includes a lower assembly, an upper assembly slideably attached to the lower assembly, at least one adjustment mechanism that interfaces with both the lower assembly and the upper assembly, and a sealing member extending between the upper assembly and the lower assembly.

Abstract: A collapsible maintenance cart includes a lower structure and an upper structure that are movable between a stowed configuration and a working configuration. In the working configuration, the lower structure and the upper structure together define an interior workspace, and the upper structure is movable relative to the lower structure between a raised position and a lowered position. In the stowed configuration, a height of the collapsible maintenance cart in the stowed configuration is less than a height of the collapsible maintenance cart in the lowered position of the working configuration.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A containment system may include four different widths of panel assemblies, at least four different types of corner assemblies, various types of door assemblies, multiple types of three-way corners or ‘T’ intersections, multiple types of exhaust panel assemblies, multiple types of wall seal assemblies, and other components that form a modular system capable of adapting to various configurations using a minimal number of fasteners, brackets, and/or clamps. Each panel assembly includes a lower assembly, an upper assembly slideably attached to the lower assembly, at least one adjustment mechanism that interfaces with both the lower assembly and the upper assembly, and a sealing member extending between the upper assembly and the lower assembly.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A containment system may include four different widths of panel assemblies, at least four different types of corner assemblies, various types of door assemblies, multiple types of three-way corners or ‘T’ intersections, multiple types of exhaust panel assemblies, multiple types of wall seal assemblies, and other components that form a modular system capable of adapting to various configurations using a minimal number of fasteners, brackets, and/or clamps. Each panel assembly includes a lower assembly, an upper assembly slideably attached to the lower assembly, at least one adjustment mechanism that interfaces with both the lower assembly and the upper assembly, and a sealing member extending between the upper assembly and the lower assembly.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A stackable, portable air filtration unit utilizing a molded plastic central housing, injection-molded plastic inlet and outlet covers and accommodating a high-efficiency particulate air (“HEPA”) filter or other high efficiency particulate filter, a secondary filter and a pre-filter. The unit is versatile and flexible in that different motorized impellers can be used alternatively, depending on the desired specifications.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A maintenance/construction cart that facilitates wall and ceiling access while isolating the interior of the cart from the surrounding environment. The cart is configured such that its height can be easily adjusted by an operator to provide access to ceilings of different heights while maintaining the seal between the interior of the cart and the surrounding environment while structurally supporting a ladder leaning against a surface of the cart. In some embodiments, the cart includes an air filtration unit.

Abstract: A stackable, portable air filtration unit utilizing a molded plastic central housing, injection-molded plastic inlet and outlet covers and accommodating a high-efficiency particulate air (“HEPA”) filter or other high efficiency particulate filter, a secondary filter and a pre-filter. The unit is versatile and flexible in that different motorized impellers can be used alternatively, depending on the desired specifications.

Abstract: An improved power-driven brush assembly is disclosed, useful for cleaning the interior surfaces of ducts, pipes, and other similar structures. The apparatus comprises a cable having a brush at one end, and a motor at the other end for spinning the cable and the brush. A casing surrounds the cable, allowing a fluid to be injected through the casing to the brush. A fluid directing assembly at the end of the casing near the brush allows fluid to the be injected into the duct in a desired direction, to flush particulate matter from the vicinity of the brush.

Abstract: A modular filtration system for cleaning HVAC ductwork includes first and second modular assemblies containing a plurality of filters. The modules can be easily transported into a site and connected to one another and to the ductwork. The system includes a plurality of wheels and external assembly protruding from the housing to assist in wheeling the housing up and down stairs.

Abstract: A method is disclosed for cleaning HVAC ductwork, including the steps of transporting first and second modular filter assemblies to a site, connecting them in sealed fluid communication with one another and to the ductwork, drawing fluid through the filtration system from the HVAC ductwork, exhausting filtered fluid from the filtration system and tilting the housing so that any stairs present at the site bear against a bearing surface of an external conveyance assembly as the modules are transported up and down stairs.

Abstract: An improved disposable containment bag for use in handling hazardous materials such as asbestos. A gusset and slide fastener assembly inside the bag permits the lower, waste-receiving compartment within the bag to be sealed, unsealed and resealed and facilitates accommodation of a large volume of waste.