Abstract: A gas cylinder cart includes a frame, a first control assembly composed of a first control panel wall and a first gas distribution assembly, a second control assembly composed of a second control panel wall and a second gas distribution assembly, and a central manifold connected to each of the first and second control assemblies. The central manifold includes a valve assembly allowing for connection of both the first and second control assemblies to gas cylinders, connection of only one of the first and second control assemblies to gas cylinders, or connection of the first and/or second control assemblies to remote gas sources. Inclusion of the first and second control assemblies within the gas cylinder cart allows for use of the gas cylinder cart in conjunction with different systems that might require different control assemblies.

Abstract: An air damper assembly for regulating an air flow includes a frame, a plurality of elongated damper blade rotatably mounted to the frame, and a drive mechanism for actuating the damper blades between open and closed positions. The drive mechanism includes a gear fixedly secured to a distal end of each of the damper blades and an elongated rack slidably coupled to the frame. The rack meshingly engages the gears such that linear movement of the rack in a first linear direction results in rotational movement of the damper blades in a first rotational direction and linear movement of the rack in a second linear direction opposite the first linear direction results in rotational movement of the damper blades in a second, rotational direction opposite the first rotational direction.

Abstract: A portable stand with an integral power supply and controller, a mast for supporting a functional device and a stabilizing leg assembly comprises a main housing for a power supply, and connected to the main housing are retractable and extendable support legs and an extendable and retractable mast. The mast includes a mount for holding at least one functional device to form a single, integral unit that provides for storage, stable support and power for a functional device that is mounted onto the mast, and portability.

Abstract: A collapsible portable stand comprises support legs and a mast that collapse into a small equipment enclosure or case, forming one single, integral unit that provides for storage, stable support for a device that is mounted onto the mast, and portability. The legs and mast are operatively connected to the case and preferably have extendable length. In an embodiment, the legs and mast are connected to the case via hinges that provide for the legs and mast to rotate with respect to the case. The case preferably has wheels and an extendable handle for ease of transport when the legs and mast are collapsed into the case. An embodiment includes an internal storage case that has a moveable cover that can include controls for and/or connections to a device stored in the internal storage case. An alternative embodiment includes a larger portable stand that has components that are external of the case and/or are independent of a case.

Abstract: A portable stand with an integral power supply and controller, a mast for supporting a functional device and a stabilizing leg assembly comprises a main housing for a power supply, and connected to the main housing are retractable and extendable support legs and an extendable and retractable mast. The mast includes a mount for holding at least one functional device to form a single, integral unit that provides for storage, stable support and power for a functional device that is mounted onto the mast, and portability.

Abstract: An electrically conductive confined space ventilation conduit formed of a substantially rigid non-metallic conductive material, such as plastic, and a related process for ventilating an enclosure accessed by a manhole or other port. In one embodiment, the conduit has a pair of outer cylindrical sections and a central section having a cross-sectional shape of a crescent or a segment of a circle where it passes through a port to provide a minimum of obstruction for men and equipment passing through the port. Intermediate sections of varying cross-section connect the central section to the cylindrical outer sections so that the outer sections are offset from the axis of the manhole. The central section is preferably configured to obstruct no more than about 10 percent of a standard manhole opening, while causing either no air flow rate reduction, or a reduction of no more than about 10 percent as compared to the flow rate through a cylindrical conduit similar to said outer sections.

Abstract: An electrically conductive confined space ventilation conduit formed of a substantially rigid non-metallic conductive material, such as plastic, and a related process for ventilating an enclosure accessed by a manhole or other port. In one embodiment, the conduit has a pair of outer cylindrical sections and a central section having a cross-sectional shape of a crescent or a segment of a circle where it passes through a port to provide a minimum of obstruction for men and equipment passing through the port. Intermediate sections of varying cross-section connect the central section to the cylindrical outer sections so that the outer sections are offset from the axis of the manhole. The central section is preferably configured to obstruct no more than about 10 percent of a standard manhole opening, while causing either no air flow rate reduction, or a reduction of no more than about 10 percent as compared to the flow rate through a cylindrical conduit similar to said outer sections.

Abstract: Interchangeable control panels for a gas cylinder cart, and a new cart frame for use therewith are disclosed. A method of reconfiguring the gas cylinder cart comprises disconnecting a first control panel from the frame and removably connecting a second control panel to the frame, wherein the first and second control panels comprise a first and second configuration of gas control devices arranged thereon respectively. A gas cylinder cart comprises a frame defining at least one bay shaped to receive a cylinder, a control panel removably connected to the frame, and at least one gas control device mounted on the control panel.

Abstract: A gas cylinder cart comprises a frame defining at least one bay shaped to receive a cylinder, a control panel removably connected to the frame, and at least one gas control device mounted on the control panel. A method of reconfiguring the gas cylinder cart comprises disconnecting a first control panel from the frame and removably connecting a second control panel to the frame, wherein the first and second control panels comprise a first and second configuration of gas control devices arranged thereon respectively. Interchangeable control panels for a gas cylinder cart, and a new cart frame for use therewith are disclosed.