Abstract: A heat treatment furnace, also referred to as a multi-chamber furnace, that includes a plurality of treatment chambers, each having heating and cooling dampers and being controllable to adjust a flow rate into the treatment chamber, the dampers of each treatment chamber being selectively and independently adjustable with respect to one another so as to allow simultaneous heat processing of a plurality of products in different treatment chambers at different respective heat treatment states depending on the amount of heating and cooling flow rates allowed to enter in each treatment chamber via the dampers.

Abstract: An energy extraction device for extracting energy from a flow of fluid is provided. The energy extraction device comprises a rotating member for rotatably mounting to a support structure, at least one rotatable bank of blades connected to the rotating member through a connection disposed radially from the main axis of rotation of the rotating member, and, a pitch control system for controlling the angular position of the at least one rotatable bank of blades relative to a direction of the flow of fluid. The rotating member has a main axis of rotation and the at least one bank of blades comprises an array of spaced-apart blades secured together. Each of the at least one bank of blades has a bank axis of rotation.

Abstract: An energy extraction device for extracting energy from a flow of fluid is provided. The energy extraction device comprises a rotating member for rotatably mounting to a support structure, at least one rotatable bank of blades connected to the rotating member through a connection disposed radially from the main axis of rotation of the rotating member, and, a pitch control system for controlling the angular position of the at least one rotatable bank of blades relative to a direction of the flow of fluid. The rotating member has a main axis of rotation and the at least one bank of blades comprises an array of spaced-apart blades secured together. Each of the at least one bank of blades has a bank axis of rotation.

Abstract: A heat insulated enclosure with an inlet introducing metal parts such as coil springs to be heat treated, such as by annealing. The apparatus also includes a support on which the metal parts are received, where they are continuously moved towards an outlet. A continuous flow of hot air is circulated substantially perpendicularly with respect to the metal parts to provide the heat treatment. This can be achieved by means of a rotary disk to receive the metal parts and allowing them to follow a spiral path until reaching the outlet. This system enables a continuous operation and is therefor much cheaper to operate.