Abstract: A cutting machine including a frame which can be hitched to a tractor and carries a cutting mechanism including a large cross section rotor equipped with knives which are mounted on axes arranged in pockets provided in the rotor. Each knife is mounted on an individual axis located in a pocket so as to be situated inside the outer periphery of the rotor and wherein this rotor, on at least one side of each pocket, has a concave recess for fitting or removing the corresponding axis.

Abstract: The present invention relates to a cutting machine comprising a frame which can be hitched to a tractor and carries a cutting mechanism comprising a large cross section rotor equipped with knives which are mounted on axes arranged in pockets provided in said rotor. Each knife is mounted on an individual axis located in a pocket set back toward the inside with respect to the outer periphery of the rotor and wherein this rotor, on at least one side of each pocket, has a concave recess for fitting or removing the corresponding axis.

Abstract: Gas injection pipe for a sequential burner in gas variable-power boilers. An array of gas injectors which are located on the injection pipe may each be plugged by a corresponding valve which is mounted on the free end of a rigid blade transversely extending through an internal chamber of the injection pipe. A rotating shaft which is stepwise driven is provided at right angles to each blade with recesses which are angularly offset on the shaft. Each blade is provided with a stud which is located in a corresponding recess when the latter is in its upward position. The stud lifts up the blade when the shaft is rotated on purpose to open the valve.