Abstract: A combustion-type power tool includes a housing having one end, a head portion disposed at the one end, and a cylinder disposed in the housing, the cylinder being formed with an exhaust hole. A piston is reciprocally movable in the cylinder, and a combustion-chamber frame is disposed in the housing and movable in an axial direction of the cylinder, the combustion-chamber frame being abuttable on the head portion to provide a combustion chamber in cooperation with the head portion and the piston. A fin is disposed on the cylinder and has a portion extending in a direction slanted in relation to the axial direction and oriented toward the exhaust hole.

Abstract: A pneumatically operated power tool such as a screw driver, a nail gun and an impact wrench those being driven by a pneumatic pressure. A pressure reduction valve is provided between a connector connected to a compressor and a compressed air chamber defined in an outer frame of the power tool for supplying a pressure lower than the pressure at the connector to the compressed air chamber. A passage section is provided independently of the pressure reduction valve and communicating the connector with the compressed air chamber. A valve member is disposed at the passage section for selectively applying compressed air from the connector to the compressed air chamber directly through the passage section.

Abstract: A combustion-type power tool includes a cylinder and a combustion chamber frame disposed to surround the cylinder and movable along the cylinder. A partition wall divides an inner space of an outer frame into a first space in which the cylinder and the combustion chamber frame are disposed and a second space in which a gas cartridge cylinder is disposed and has a through-hole through which the first space and the second space are in fluid communication with each other. A plurality of ribs is formed on an outer surface of the cylinder for regulating an exhaust gas flow generated by combustion of a gaseous mixture in the combustion chamber. The ribs enable exhaust gas discharged from the combustion chamber to be directed away from the through-hole, thereby enabling the gas cartridge cylinder to be maintained at a substantially constant temperature.

Abstract: A combustion-type power tool having a cooling arrangement for cooling a gas canister. The tool includes a housing having a gas canister accommodating section in which a gas canister is accommodated. An air passage is defined between the gas canister accommodating section and the gas canister accommodated therein. The gas canister accommodating section is formed with an air inlet port in communication with the air passage for introducing air into the air passage. Since air flows along the gas canister, the gas canister can be cooled. If the tool is provided with a fan, the rotation of the fan causes air suction passing through the air passage.

Abstract: A combustion-type power tool includes a housing having one end, a head portion disposed at the one end, and a cylinder disposed in the housing, the cylinder being formed with an exhaust hole. A piston is reciprocally movable in the cylinder, and a combustion-chamber frame is disposed in the housing and movable in an axial direction of the cylinder, the combustion-chamber frame being abuttable on the head portion to provide a combustion chamber in cooperation with the head portion and the piston. A fin is disposed on the cylinder and has a portion extending in a direction slanted in relation to the axial direction and oriented toward the exhaust hole.

Abstract: A pneumatically operated power tool such as a screw driver, a nail gun and an impact wrench those being driven by a pneumatic pressure. A pressure reduction valve is provided between a connector connected to a compressor and a compressed air chamber defined in an outer frame of the power tool for supplying a pressure lower than the pressure at the connector to the compressed air chamber. A passage section is provided independently of the pressure reduction valve and communicating the connector with the compressed air chamber. A valve member is disposed at the passage section for selectively applying compressed air from the connector to the compressed air chamber directly through the passage section.

Abstract: A pneumatically operated power tool such as a screw driver, a nail gun and an impact wrench those being driven by a pneumatic pressure. A pressure reduction valve is provided between a connector connected to a compressor and a compressed air chamber defined in an outer frame of the power tool for supplying a pressure lower than the pressure at the connector to the compressed air chamber. A passage section is provided independently of the pressure reduction valve and communicating the connector with the compressed air chamber. A valve member is disposed at the passage section for selectively applying compressed air from the connector to the compressed air chamber directly through the passage section.

Abstract: A combustion-type power tool includes a cylinder and a combustion chamber frame disposed to surround the cylinder and movable along the cylinder. A combustion chamber is formed on top of the cylinder that accommodates a gaseous mixture of existing air in the combustion chamber and fuel injected therein from a gas cylinder. A spark plug generates a spark to combust the gaseous mixture in the combustion chamber. A trigger switch produces the spark in the spark plug when operated. A piston slidably moves along the inner surface of the cylinder and driven by combustion in the combustion chamber. A driving blade is secured to the piston for driving a fastener. A partition wall divides the inner space of the outer frame into a first space in which the cylinder and the combustion chamber frame are disposed and a second space in which the gas cylinder is disposed. The partition wall is formed with a through-hole through which the first space and the second space are in fluid communication with each other.

Abstract: A combustion-type power tool includes a cylinder having a peripheral wall which has an inner peripheral surface and an outer peripheral surface. The peripheral wall is formed with an exhaust hole at a first axial position. A piston is reciprocally movable in an axial direction and is slidable in contact with the inner peripheral surface. A combustion-chamber frame is abuttable on a head portion to provide a combustion chamber in cooperation with the head portion and the piston. The piston allows the combustion chamber to be in fluid communication with an atmosphere through an upper space above the piston and through the exhaust hole when the piston is located at a bottom dead center. The fin is disposed at the outer peripheral surface and has a portion extending in a direction slanted in relation to the axial direction and oriented toward the exhaust hole.

Abstract: A combustion-type power tool having a cooling arrangement for cooling a gas canister. The tool includes a housing having a gas canister accommodating section in which a gas canister is accommodated. An air passage is defined between the gas canister accommodating section and the gas canister accommodated therein. The gas canister accommodating section is formed with an air inlet port in communication with the air passage for introducing air into the air passage. Since air flows along the gas canister, the gas canister can be cooled. If the tool is provided with a fan, the rotation of the fan causes air suction passing through the air passage.

Abstract: A combustion-type power tool includes a cylinder having a peripheral wall which has an inner peripheral surface and an outer peripheral surface. The peripheral wall is formed with an exhaust hole at a first axial position. A piston is reciprocally movable in an axial direction and is slidable in contact with the inner peripheral surface. A combustion-chamber frame is abuttable on a head portion to provide a combustion chamber in cooperation with the head portion and the piston. The piston allows the combustion chamber to be in fluid communication with an atmosphere through an upper space above the piston and through the exhaust hole when the piston is located at a bottom dead center. The fin is disposed at the outer peripheral surface and has a portion extending in a direction slanted in relation to the axial direction and oriented toward the exhaust hole.

Abstract: A pneumatically operated power tool such as a screw driver, a nail gun and an impact wrench those being driven by a pneumatic pressure. A pressure reduction valve is provided between a connector connected to a compressor and a compressed air chamber defined in an outer frame of the power tool for supplying a pressure lower than the pressure at the connector to the compressed air chamber. A passage section is provided independently of the pressure reduction valve and communicating the connector with the compressed air chamber. A valve member is disposed at the passage section for selectively applying compressed air from the connector to the compressed air chamber directly through the passage section.

Abstract: A bolt 6, accommodated in a cylinder knob 10, is screwed into a main body 5 to restrict the shift movement of a push lever 1. A spline coupling, provided between a hexagonal bore 10a formed in the cylinder knob 10 and a hexagonal head 6a of the bolt 6, transmits a rotational motion of cylinder knob 10 to the bolt 6 and allows the cylinder knob 10 to slide with respect to the main body 5. A projection 12 of the main body 5 and a notch 10b of the cylinder knob 10, when engaged with each other under a resilient force of a spring 12, cooperatively constitute a stopper for restricting the rotation of the cylinder knob 10 with respect to the main body 5.

Abstract: In a driving tool, an air tank 103 is coupled via a pressure reducing valve 104 to a rear end of a handle portion 102 which is disposed substantially perpendicularly to an approximately cylindrical output section 101, and the air tank 103 is configured by: a vertical portion 103a which protrudes in the rear side of the handle section 102; and a horizontal portion 103b which extends in substantially parallel with the handle section 102, whereby the center of gravity 140 of the whole tool is positioned in the vicinity of a gripping portion 130, so that the weight balance is improved and the dimensions are reduced.

Abstract: A bolt 6, accommodated in a cylinder knob 10, is screwed into a main body 5 to restrict the shift movement of a push lever 1. A spline coupling, provided between a hexagonal bore 10a formed in the cylinder knob 10 and a hexagonal head 6a of the bolt 6, transmits a rotational motion of cylinder knob 10 to the bolt 6 and allows the cylinder knob 10 to slide with respect to the main body 5. A projection 12 of the main body 5 and a notch 10b of the cylinder knob 10, when engaged with each other under a resilient force of a spring 12, cooperatively constitute a stopper for restricting the rotation of the cylinder knob 10 with respect to the main body 5.

Abstract: In a driving tool, an air tank 103 is coupled via a pressure reducing valve 104 to a rear end of a handle portion 102 which is disposed substantially perpendicularly to an approximately cylindrical output section 101, and the air tank 103 is configured by: a vertical portion 103a which protrudes in the rear side of the handle section 102; and a horizontal portion 103b which extends in substantially parallel with the handle section 102, whereby the center of gravity 140 of the whole tool is positioned in the vicinity of a gripping portion 130, so that the weight balance is improved and the dimensions are reduced.

Abstract: A nailing machine is provided with a second accumulator chamber 20 capable of accumulating compressed air having a pressure higher than air pressure usable by a machine body, an air intake 16 connectable to an air compressor via an air hose or the like, a valve 22 for control of the communication between the second accumulator chamber 20 and the air intake 16, and a pressure reducing valve 21 for reducing the compressed air pressure in the second accumulator chamber 20 and supplying the pressure-reduced compressed air into a first accumulator chamber 2.

Abstract: A repetitive striking type pneumatically operated nail gun for repeatedly striking, by a drive bit, a head of a nail for sinking the nail into a workpiece. The drive bit is connected to a piston reciprocally movably disposed in a cylinder. A return chamber is provided around the cylinder and in communication therewith. A head valve chamber is provided at a position above a head valve disposed above the cylinder. A drive air is provided for selectively applying compressed air to the head valve chamber or into the cylinder. A repetitive valve chamber is provided for providing selective communication with the return valve, the head valve chamber and a trigger valve. A cylinder guide is provided which prevents the cylinder from being moved in its axial direction in a case where the pressure within the return chamber becomes higher than that in the drive air chamber. A partition segment is provided to the cylinder guide for separating the return chamber from the drive air chamber.

Abstract: A window opener for a remote open-and-close operation of a quater window of an automobile or the like comprises an actuating device, a driving device and pull-cables as a power transmitting member so that freedom of cable-arrangement is widened and large cabin space is remained in an automobile. The actuating device has a pulley, a rotary shaft connected to the pulley, and a link mechanism for converting a rotational torque of the rotary shaft into an opening-and-closing force for a wing member of a window. The pull cables are connected with the pulley so that reciprocal pull-operation through the driving device causes reciprocal rotation of the pulley.