Abstract: The invention relates to an increment charge (4) to be placed around a tail shaft of a fin-stabilized mortar projectile (1), the increment charge (4) having a centrally located space for the tail shaft and a mounting opening in the space for mounting the increment charge (4). On the opposite side of the increment charge (4) there is provided a protrusion that fits into the mounting opening of an adjacent increment charge (4) for locking them in relation to each other.

Abstract: A method of plowing snow from a site using a snowplow with at least two plow blades (5) forming together a plowing angle and there being on the plowing site fixed objects, such as airport lamps (1), rising over the site surface. In the method, when the snowplow faces an object, the plow front end is opened and the area with the object on it is left unplowed by the open front end, with this unplowed area then being cleaned by brushes (6,7) in the rear of the plow front end.

Abstract: A support member for supporting a mortar shell (1) into a barrel (2) of a weapon, and a method for attaching said supporting member (6) to a tail (4) in the mortar shell (1). The supporting member (6) includes a support element (8) provided with a rim flange (7) and a firing mechanism (15). The support element (8) is supported by means of one or more attachment pieces (10) against a front rim (23) in guiding fins (5) in the mortar shell (1). The attachment pieces (10) include a predetermined deformable point enabling the detachment of the fired mortar shell (1) from the supporting member (6).

Abstract: A support member for supporting a mortar shell (1) into a barrel (2) of a weapon, and a method for attaching said supporting member (6) to a tail (4) in the mortar shell (1). The supporting member (6) includes a support element (8) provided with a rim flange (7) and a firing mechanism (15). The support element (8) is supported by means of one or more attachment pieces (10) against a front rim (23) in guiding fins (5) in the mortar shell (1). The attachment pieces (10) include a predetermined deformable point enabling the detachment of the fired mortar shell (1) from the supporting member (6).

Abstract: A sweeping unit has a supporting frame and at least one motor-driven rotary brush which is rotationally mounted about an longitudinal axis thereof The supporting frame is provided with supporting wheels, and a distance of the wheels from the axis of the rotary brush is controlled by an adjusting device having at least one hydraulic adjusting cylinder and a control device. A supply cylinder is hydraulically connected to the at least one adjusting cylinder and has a piston, or other signalling component, connected to a metering device and/or distance measurement device. A signal from the metering and/or distance measurement device is connected to the control unit. A working area of the supply cylinder communicates hydraulically with the at least one adjusting cylinder and has a smaller cross-sectional surface area than that of the at least one adjusting cylinder. Alternatively, the piston of the supply cylinder is connected to a mechanical adjusting drive mechanism.

Abstract: A sweeping unit which can be affixed to a carrier vehicle or a trailer, comprising a supporting frame and at least one motor-driven rotary brush which is rotationally mounted around the longitudinal axis thereof. The supporting frame is provided with supporting wheels, whereby the vertical distance of said wheels from the axis of the rotary brush can be modified by means of an adjusting device comprising at least one adjusting member and a control unit. A sensor is provided for the detection of driving torque or the driving power of the rotary brush or an associated variable, whereby the signal from said sensor is switched to the control unit. The control unit determines the working position of the adjusting member corresponding to an optimum contact surface between the brush and the ground as a function of the contact position between the ground and the adjusting member, characterized by a sharp increase in said sensor signal when the rotary brush is lowered.

Abstract: A brush assembly is provided in a movable sweeper in which the sweeper includes a vehicle frame to which a rotatable cylindrical brush is connected. The sweeper comprises a turning equipment to turn a brush frame around the vertical axle. The turning equipment comprises a first hydraulic cylinder by means of which an articulated auxiliary bar is turned around its articulating joint. A second hydraulic cylinder is fixed to the auxiliary bar from one of its ends and the second hydraulic cylinder is fixed to the brush frame on its other end. The working positions of the brush are obtained by driving one of the hydraulic cylinders to its longest or correspondingly shortest position. A transporting position for the brush is obtained by driving the other one of the cylinders (first or second one) to its extreme position.

Abstract: A coupling arrangement between a trailer and a pulling vehicle wherein the pulling vehicle includes a first coupling plate on which the corresponding second coupling plate of the trailer is placed for obtaining locked coupling. The plates have low friction surfaces allowing the second plate to rotate on the first plate. The plates are locked to each other by a vertical pin fixed to the second coupling plate. The first coupling plate includes an open groove for the pin to get into the locking position in the end of the groove. The coupling arrangement further includes a movable locking part fixed to the second plate and being able by means of a spring to move into the groove of the first coupling plate when the plates are rotating in relation to each other.

Abstract: The invention relates to an arrangement for supporting a mortar shell into the barrel of a mortar weapon by using a separate support piece fixed to the tail of the mortar shell. In the arrangement the support piece is attached to the tail of the mortar shell with a mechanical joint provided by a separate connecting element (7), the connecting element being manufactured of such material and constructed in such a way that it fractures when the charge of the mortar shell is fired, allowing the mortar shell (1) to detach from the support piece (8).