A battery retaining system for a portable oxygen concentrator includes a first rail configured to receive a first slide of a battery, a second rail configured to receive a second slide of the battery, the second rail being spaced apart from the first rail so as to form a channel configured to receive the battery, and a flexible stiffening mechanism configured to impart a biasing force on a surface of the battery when the battery is received within the channel. The flexible stiffening mechanism includes a protrusion projecting from the first rail at least partially towards the second rail and a slit positioned behind the protrusion and configured to facilitate travel of the protrusion fore and aft.

An expandable fuel line section for an aircraft, a fuel line for an aircraft, and a method for fabricating an expandable fuel line section for an aircraft are provided. In one non-limiting example, the expandable fuel line section includes a first inner tube section subassembly. A second inner tube section subassembly is in fluid communication with the first inner tube section subassembly. An outer tube subassembly has an outer tube wall surrounding an outer tube channel. The first and second inner tube section subassemblies are slidingly disposed in the outer tube channel to move between retracted positions and extended positions.

An expandable fuel line section for an aircraft, a fuel line for an aircraft, and a method for fabricating an expandable fuel line section for an aircraft are provided. In one non-limiting example, the expandable fuel line section includes a first inner tube section subassembly. A second inner tube section subassembly is in fluid communication with the first inner tube section subassembly. An outer tube subassembly has an outer tube wall surrounding an outer tube channel. The first and second inner tube section subassemblies are slidingly disposed in the outer tube channel to move between retracted positions and extended positions.

A fluid supply interface includes a line component having a first coupling formation for the temporary coupling of a first fluid channel, a second coupling formation for the temporary coupling of a second fluid channel, and a third coupling formation for the temporary or permanent coupling of a third fluid channel, each of said coupling formations being penetrated by a fluid line section, wherein in the line component, a fluid line assembly is formed, by means of which each fluid line section of the first, second and third coupling formations is or can be connected to each fluid line section of the other two coupling formations for the purpose of fluid transport.

A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.

A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.

An assembly for fastening a conduit to a flashing structure that is typically secured to a shingled roof. The apparatus includes an adjustable clamp that can be secured to a cap on the flashing. A conduit is laid on top of the cap and the adjustable clamp is positioned on top of the conduit and is snapped in place along the perimeter of the cap. An adjustable bolt is threaded through the top of the clamp with a curved saddle that resides beneath the clamp and conforms to the shape of the conduit's outer surface. The bolt can then be adjusted to tighten the conduit to the cap. An exemplary use of the clamp involves securing conduit for running electrical wiring throughout a solar panel array.

A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.

A swivel knuckle assembly for interconnecting a motor and a supply line. The knuckle assembly may include a bearing member to reduce a coefficient of friction. A locking mechanism is disclosed to connect members of the knuckle assembly.

A manifold structure for a fluid reclamation apparatus incorporated into a hydraulic system having inner and outer fluid lines and with annular containment space between the inner and outer fluid lines for capturing fluid leaking from the inner fluid line, the manifold structure being connected to least one end the inner and outer fluid lines and contains a chamber for receiving leaked fluid from the annular space and including a manifold inner sleeve to which the inner fluid line is coupled, the inner sleeve being retained within a manifold outer sleeve to which the outer fluid line is coupled and having a lateral bore extending from the chamber and through the outer sleeve for delivering leaked fluid into a reclamation line and back into the hydraulic system, the inner sleeve being rotatably mounted within the outer sleeve by at least one O-ring seated in a groove around the inner sleeve and sealingly abutting the inner surface of the outer sleeve.