Abstract: A grid nozzle assembly for a fluidized bed reactor that includes a horizontally extending bottom plate, a gas plenum chamber below the bottom plate, and vertical gas pipes having a top end and extending from the gas plenum chamber upwards across the bottom plate. The assembly includes a nozzle head with a gas channel that injects fluidizing gas from one of the vertical gas pipes to the reaction chamber. A tube sleeve is adapted to be fixed by welding around the top end of the vertical gas pipe. The nozzle head and the tube sleeve have a knob and groove portion that form a twist-lock enabling quick connecting and disconnecting of the nozzle head and the tube sleeve.

Abstract: A grid nozzle assembly for a fluidized bed reactor, a fluidized bed reactor with a grid nozzle assembly, a method of mounting a grid nozzle assembly as a replacement in a fluidized bed reactor, and a method of replacing a grid nozzle assembly in a fluidized bed reactor. The reactor includes a horizontally extending bottom plate, a gas plenum chamber below the bottom plate, and vertical gas pipes having a top end and extending from the gas plenum chamber upwards across the bottom plate. The nozzle assembly includes a nozzle head with a gas channel for injecting fluidizing gas from one of the vertical gas pipes to the reaction chamber and a tube sleeve adapted to be firmly fixed by welding around the top end of the vertical gas pipe. The nozzle head and the tube sleeve form a twist-lock enabling quick connecting and disconnecting.

Abstract: A pedal drive system for a bicycle includes a front spiral cone pulley and a rear pulley. The front spiral cone pulley is attached to a crank arm, and the rear pulley is attached to a rear wheel on a bicycle in some embodiments. A power cable, or tension linkage, extends between the front spiral cone pulley and the rear pulley. The front spiral cone pulley is angularly moveable relative to the first crank arm such that the radial position of the point of engagement between the power cable and the front spiral cone pulley may be selectively manipulated for controlling the gear ratio between the front spiral cone pulley and the rear pulley. In some embodiments, the rear pulley is also a spiral cone pulley.

Abstract: A pedal drive system for a bicycle includes a front spiral cone pulley and a rear pulley. The front spiral cone pulley is attached to a crank arm, and the rear pulley is attached to a rear wheel on a bicycle in some embodiments. A power cable, or tension linkage, extends between the front spiral cone pulley and the rear pulley. The front spiral cone pulley is angularly moveable relative to the first crank arm such that the radial position of the point of engagement between the power cable and the front spiral cone pulley may be selectively manipulated for controlling the gear ratio between the front spiral cone pulley and the rear pulley. In some embodiments, the rear pulley is also a spiral cone pulley.

Abstract: An explosion containment vessel includes an inner frame structure for surrounding a potential explosive device, and an outer expandable containment vessel, which expands with the explosion, thereby mitigating potential damage that a bomb blast could do. In addition, a bomb capturing device is provided on the bottom end of the inner frame for lifting the explosive device into the inner frame and for closing the bottom end of the inner frame.