Safety valve for a pneumatically actuatable tool

A pneumatic tool, comprising:

• a handle (26), a valve (22), a safety switch lever (18) disposed on the handle (26) for actuating the valve (22), and a pressure fluid 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 pneumatic 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 at least one further position,
• wherein the pressure cylinder (12) is vented with the displacement of the valve body (28) into the home position and a pressure applied to the pressure medium connection (16) displaces the valve body (28) into the home position when the safety switch lever (18) is released,
• wherein the valve body (28) is in the form of a sleeve which is displaceable on a pressure supply connection piece (30) and which has an inner surface that encloses a pressure chamber (34) with an outer surface of the pressure supply connection piece (30), wherein an outer diameter of the pressure supply connection piece (30) on a side open towards the pressure cylinder (12) is larger than an outer diameter of the pressure supply connection piece (30) on a side open towards the pressure medium connection (16).

A pneumatic tool, comprising:

• a handle (26), a valve (22), a safety switch lever (18) disposed on the handle (26) for actuating the valve (22), and a pressure fluid 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 pneumatic 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 at least one further position,
• wherein the pressure cylinder (12) is vented with the displacement of the valve body (28) into the home position and a pressure applied to the pressure medium connection (16) displaces the valve body (28) into the home position when the safety switch lever (18) is released,
• wherein the valve body (28) is in the form of a sleeve which is displaceable on a pressure supply connection piece (30) and which has an inner surface that encloses a pressure chamber (34) with an outer surface of the pressure supply connection piece (30), wherein the pressure supply port (30) comprises a first inner bore (30a) open to the pressure fluid port (16) and a second inner bore (30b) open to the pressure cylinder (12), and first and second pressure passage bores (32a, 32b), which respectively connect the first or second inner bore (30a, 30b) to the outer surface of the pressure supply connection piece (30), wherein, in the home position, the first pressure passage bores open into the pressure chamber (34) and the second pressure passage bores (32b) are released for venting, and, in the further position, the first and the second pressure passage bores (32a, 32b) open into the pressure chamber (34).