Abstract: The invention relates to a pneumatic tool with a handle (26), valve (22), a safety switch lever (18) arranged on the handle (26) for actuating the valve (22) and a pressure medium connection (16), wherein the valve (22) comprises a valve body (28) movable between a home position and at least one further position, wherein a connection between the pressure medium connection (16) and a pressure cylinder (12) of the tool is interrupted in the home position and the connection between the pressure medium connection (16) and the pressure cylinder (12) of the tool is established in the further position. It is proposed that the pressure cylinder (12) is vented with the displacement of the valve body (28) to the home position and a pressure applied to the pressure medium connection (16) displaces the valve body (28) toward the home position when the safety switch lever (18) is released.

Abstract: The flow path switching valve described herein has a valve chamber with three openings and a valve piston disposed in the valve chamber. The valve piston has a flexible diaphragm which at its circumference co-operates sealingly with an inner circumferential wall of the valve chamber. The valve piston is movable between two end positions; in a first end position, it opens a flow path between a first opening and a second opening and blocks a third opening, and in the second end position, it blocks the first opening and opens a flow path between the second opening and the third opening. The wall of the valve chamber is shaped such that in the last phase of the diaphragm movement to the first end position, the sealing contact between the diaphragm and the inner wall is undone in at least part of the circumference.

Abstract: The flow path switching valve described herein has a valve chamber with three openings and a valve piston disposed in the valve chamber. The valve piston has a flexible diaphragm which at its circumference co-operates sealingly with an inner circumferential wall of the valve chamber. The valve piston is movable between two end positions; in a first end position, it opens a flow path between a first opening and a second opening and blocks a third opening, and in the second end position, it blocks the first opening and opens a flow path between the second opening and the third opening. The wall of the valve chamber is shaped such that in the last phase of the diaphragm movement to the first end position, the sealing contact between the diaphragm and the inner wall is undone in at least part of the circumference.

Abstract: A leno device uses the link mechanisms (31, 31?) to derive the movement of its half shaft (28) from the movement of its pull or lifting shafts (2, 3). The link mechanisms (31, 31?) connect the shaft rods (4, 5) of the pull or lifting shafts (2, 3) to the half shaft (28), whereby a connecting rod (32, 32?) extends between the two pull or lifting shafts (2, 3) from the top to the bottom through said shafts. The upper end of the connecting rod (32, 32?) is connected, on both sides of the connecting rod (32 32?) via connecting levers (33, 34, 33? 34?), to the joints (36, 37, 36?, 37?) that are connected to the upper shaft rods (4, 5) of the pull or lifting shafts (2, 3).

Abstract: A leno device uses the link mechanisms (31, 31?) to derive the movement of its half shaft (28) from the movement of its pull or lifting shafts (2, 3). The link mechanisms (31, 31?) connect the shaft rods (4, 5) of the pull or lifting shafts (2, 3) to the half shaft (28), whereby a connecting rod (32, 32?) extends between the two pull or lifting shafts (2, 3) from the top to the bottom through said shafts. The upper end of the connecting rod (32, 32?) is connected, on both sides of the connecting rod (32 32?) via connecting levers (33, 34, 33? 34?), to the joints (36, 37, 36?, 37?) that are connected to the upper shaft rods (4, 5) of the pull or lifting shafts (2, 3).