Abstract: A phase-redundant voltage regulator apparatus includes groups of regulator phases, each having a multi-phase controller (MPC) connected to each regulator phase. The MPC transfers, to control logic, phase fault signals and a shared current (ISHARE) phase control signal received from each dedicated regulator phase of a phase group. Spare regulator phases include output ORing devices to limit current flow into spare regulator phase outputs. Output switching devices are configured to electrically couple spare regulator phase outputs to a common regulator output. Control logic is connected to the phase groups MPC and asserts phase enable signals to, transfers ISHARE phase control signals to, and receives phase fault signals from the spare regulator phases. The control logic electrically interconnects a spare regulator phase to a phase group including a failed regulator phase in response to receiving a phase fault signal from an MPC.

Abstract: A phase-redundant voltage regulator apparatus includes groups of regulator phases, each having a multi-phase controller (MPC) connected to each regulator phase. The MPC transfers, to control logic, phase fault signals and a pulse-width modulation (PWM) phase control signal received from the regulator phases of a phase group. Spare regulator phases include output ORing devices to limit current flow into spare regulator phase outputs. Output switching devices are configured to electrically couple spare regulator phase outputs to a common regulator output. Control logic is connected to the phase groups MPC and asserts phase enable signals to, transfers PWM phase control signals to, and receives phase fault signals from the spare regulator phases. The control logic electrically interconnects a spare regulator phase to a phase group including a failed regulator phase in response to receiving a phase fault signal from an MPC.

Abstract: A phase-redundant voltage regulator apparatus includes groups of regulator phases, each having a multi-phase controller (MPC) connected to each regulator phase. The MPC transfers, to control logic, phase fault signals and a shared current (ISHARE) phase control signal received from the regulator phases of a phase group. Spare regulator phases include output ORing devices to limit current flow into spare regulator phase outputs. Output switching devices are configured to electrically couple spare regulator phase outputs to a common regulator output. Control logic is connected to the phase groups MPC and asserts phase enable signals to, transfers ISHARE phase control signals to, and receives phase fault signals from the spare regulator phases. The control logic electrically interconnects a spare regulator phase to a phase group including a failed regulator phase in response to receiving a phase fault signal from an MPC.

Abstract: A phase-redundant voltage regulator can include multiple regulator phases connected in parallel between a common regulator input and a common regulator output. Each regulator phase includes a voltage regulator that receives an input voltage and drives a respective output voltage. The voltage regulator also includes a plurality of linear regulators, each having a linear ORing device electrically connected between the regulator output of a respective regulator and an output of the linear regulator. The voltage regulator also includes an amplifier having inputs electrically connected to a remote voltage sense input and to a reference voltage input. An output of the voltage regulator is electrically connected to an input of the linear ORing device. The amplifier controls the linear ORing device to drive a voltage on the output of the linear regulator equivalent to a voltage on the reference voltage input.

Abstract: A pneumatic motor propulsion source including a friction welding apparatus, a gas accumulator tank operably coupled to the friction welding apparatus, and an air compressor operably coupled to the gas accumulator tank.

Abstract: In some implementations, an apparatus includes a body, a receiver in contact with the body, at least one tensioner operable coupled to the receiver, and a strap further comprising a strong and flexible material, each end of the strap operably coupled to one of the at least one tensioner, the strap being in contact with the body.

Abstract: A defect perimeter sealing system that includes a plurality of perimeter base components that are arranged around a defect of a tank, where all of a top of the perimeter base components are encompassed or spanned by compression panels, the plurality of perimeter base components and the compression panels defining a fill zone between the plurality of perimeter base components and the compression panels, and an injected material in the fill zone.

Abstract: In some implementations, an apparatus includes a container having an exterior surface, having an interior surface and having a defect, a gasket positioned over the defect in the container, the gasket having a length, a width and a depth, a rigid patch positioned over the gasket, a plurality of pairs of studs and nuts positioned near the outer perimeter of the rigid patch, the studs being friction welded to the exterior of the container.

Abstract: In some implementations, an apparatus includes a container having an exterior surface, having an interior surface and having a defect, a gasket positioned over the defect in the container, the gasket having a length, a width and a depth, a rigid patch positioned over the gasket, a plurality of pairs of studs and nuts positioned near the outer perimeter of the rigid patch, the studs being friction welded to the exterior of the container.

Abstract: In some implementations, an apparatus includes a container having an exterior surface, having an interior surface and having a defect, a gasket positioned over the defect in the container, the gasket having a length, a width and a depth, a rigid patch positioned over the gasket, a plurality of pairs of studs and nuts positioned near the outer perimeter of the rigid patch, the studs being friction welded to the exterior of the container.

Abstract: A defect perimeter sealing system that includes a plurality of perimeter base components that are arranged around a defect of a tank, where all of a top of the perimeter base components are encompassed or spanned by compression panels, the plurality of perimeter base components and the compression panels defining a fill zone between the plurality of perimeter base components and the compression panels, and an injected material in the fill zone.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: In some implementations, an apparatus includes a body, a receiver in contact with the body, two tensioners operable coupled to the receiver and a strap that includes strong and flexible material in which each end of the strap is attached to one of the two tensioners and the strap is in contact with the body.

Abstract: In some implementations, an apparatus includes a container having an exterior surface, having an interior surface and having a defect, a gasket positioned over the defect in the container, the gasket having a length, a width and a depth, a rigid patch positioned over the gasket, a plurality of pairs of studs and nuts positioned near the outer perimeter of the rigid patch, the studs being friction welded to the exterior of the container.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: In some implementations, an injectable flange gasket includes a plate having two parallel surfaces, each of the two parallel surfaces having an perimeter, the plate also having an outer edge between the perimeters of the parallel surfaces, the outer edge being about perpendicular to the two parallel surfaces, at least one groove in only one of the two parallel surfaces, the groove being continuous and the plate also having a hole that extends from a wall of the groove and through the outer edge of the plate.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.