초록 ▼

Pneumatic or pressurized fluid tool, such as a screwdriver, having a control device. The control device includes a pivotally mounted trigger which causes rotation of the motor in a first rotational direction when pivoted in a first direction and which causes rotation of the motor in an opposite rota

Pneumatic or pressurized fluid tool, such as a screwdriver, having a control device. The control device includes a pivotally mounted trigger which causes rotation of the motor in a first rotational direction when pivoted in a first direction and which causes rotation of the motor in an opposite rotational direction when pivoted in a second direction opposite to the first direction. The trigger is connected to a piston which is movable in a cylinder. The piston is connected by a rod to a valve and includes a cam. The cam of the piston, cooperating with a plunger, operates a selector so that when the trigger is pivoted in the first direction, compressed air or pressurized fluid is admitted to rotate the motor in the first direction. If the trigger is pivoted in the second direction, the cam, cooperating with the plunger, moves the selector to close an inlet passage corresponding to the first rotational direction of the motor and opens a second inlet passage corresponding to the opposite rotational direction of the motor.

대표청구항 ▼

[ There is claimed:] [5.] A pressurized fluid device, comprising:a body including a cavity opening, a bore, and a wall having an exhaust passage;a pressurized fluid motor housed in the body, the pressurized fluid motor having an exhaust, the pressurized fluid motor capable of driving a tool;a first

[ There is claimed:] [5.] A pressurized fluid device, comprising:a body including a cavity opening, a bore, and a wall having an exhaust passage;a pressurized fluid motor housed in the body, the pressurized fluid motor having an exhaust, the pressurized fluid motor capable of driving a tool;a first inlet passage communicating with the cavity opening of the body, the first inlet passage corresponding to a normal direction of rotation of the pressurized fluid motor;a second inlet passage communicating with the cavity opening of the body, the second inlet passage corresponding to an opposite direction of rotation of the pressurized fluid motor;a handle connected to the body, the handle including a handle inlet passage capable of being connected to a pressurized fluid supply hose, the handle including an exhaust passage connected to the exhaust of the pressurized fluid motor; anda control device capable of selectively conveying pressurized fluid to the first inlet passage when a trigger is pivoted in a first direction and to the second inlet passage when the trigger is pivoted in a second direction opposite to the first direction, wherein:the trigger is pivotally connected to the handle, the trigger is also connected to a piston which is moveable in a cylinder, the piston has an opening in which a rod is disposed, the rod is fastened to a valve such that pivoting of the trigger in the first direction is capable of causing entry of pressurized fluid from the handle inlet passage to the cavity opening of the housing and such that pivoting of the trigger in the second direction is also capable of causing entry of pressurized fluid from the handle inlet passage to the cavity opening of the housing, andthe piston has on a side opposite of the trigger a cam cooperating with a first end of a plunger which is guided in the bore of the body, a second end of the plunger bearing against a selector, a first end of the selector pivots on a pin on the wall of the body, a second end of the selector comprises a vane which cooperates with the wall, a spring biases the selector in a position in which the first inlet passage can be supplied with pressurized fluid and the second inlet passage communicates with the exhaust passage of the wall, pivoting of the trigger in the first direction corresponding to normal rotation of the pressurized fluid motor causes the piston to slide in a first sliding direction to cause opening of the valve, pivoting of the trigger in the second sliding direction causes the piston to slide in a second sliding direction to cause opening of the valve and causes the cam to displace the plunger which moves the selector so that the vane closes the first inlet passage, opens the second inlet passage, and establishes a communication between the first inlet passage and the exhaust passage.