Abstract: A pneumatic impact wrench includes a handle assembly graspable by a user, a work attachment connected to the handle assembly, an inlet permitting air flow to drive the impact wrench, an outlet permitting air flow out of the impact wrench, a motor assembly positioned between the inlet and the outlet includes a rotor driven by the air flow between the inlet and the outlet. The motor assembly defines a longitudinal motor axis about which the rotor rotates. An output drive is connected to the motor assembly to selectively rotate in response to rotation of the rotor, the output drive defines a longitudinal output axis about which the output drive rotates, the longitudinal output axis is substantially perpendicular to the longitudinal motor axis, and an impact mechanism is positioned between the motor assembly and the output drive to selectively drive the output drive in response to rotation of the rotor.

Abstract: An outlet flow deflector unit for a pneumatic power tool having a housing with an outlet opening, comprises a cup-shaped rotatable deflector element communicating with the outlet opening and having at least one axially directed opening and one radially directed opening located within a certain angular interval of the deflector element circumference, and a stationary cup-shaped sector element located inside the deflector element and having radial opening locating in a certain angular sector substantially larger than the angular interval of the deflector element opening, and an axially directed outlet port, wherein the deflector element is rotatable to obtain alignment either between the radial openings for a radially directed outlet flow, or between the axial opening and the outlet port for accomplishing an axially directed outlet flow.

Abstract: A pneumatic power tool includes a pneumatic motor mounted in a housing and supplied to pressured air through an air control unit to rotate a drive coupler, a coupling shell member surrounding the drive coupler and having axially opposite actuating and engaging regions, an output spindle having a bearing surface disposed between the drive coupler and the engaging region, and an override clutch unit coupling the drive coupler to the coupling shell member. An override movement of a driven clutch half on the engaging region brings the actuating region to move axially so as to force a latch to an unlatched position such that the air control unit is displaced to a shut-off state.

Abstract: An pneumatic tool includes a front section, a rear section connected to and disposed behind the front section, a driving unit, and an air cylinder unit. The rear section includes a main body, a handle connected to the main body and adjacent to the front section, and an intake passage in fluid communication with the outside. The air cylinder unit includes a first cylinder mounted within the rear section, a second cylinder connected to the first cylinder, an extension portion extending into the handle, and an inclined intake channel having an inlet in fluid communication with intake passage, and an outlet in fluid communication with the first cylinder. The rotor unit is mounted rotatably within the first and second cylinders for activating the driving unit.

Abstract: A rotationally driven air tool configured to be capable of retaining a lubricant in a gear of a rotation transmitting mechanism as long as possible has an air motor (14), a rotation transmitting mechanism (18) transmitting rotational driving force from a rotational output shaft (12) of the air motor to a rotary tool member (15), e.g. an abrasive disc, and a housing (28) having a motor chamber (20), a rotation transmitting chamber (22), a partition (24) between the motor chamber and the rotation transmitting chamber, and an air blow port (72) provided to extend through the partition to blow air discharged from the air motor toward a peripheral wall surface of the rotation transmitting chamber.

Abstract: A structure for adjusting positive or reverse rotation of a pneumatic tool is proposed to be mainly composed of an outer casing, a driving device and a knob. An air controlling part arranged on the outer casing leads air to be transmitted from an air incoming chamber in the outer casing to the driving device through a reducing air intake. A bearing seat is arranged in the driving device. The knob arranged on the outer casing extends with an annular wall for separating air incoming from air discharging. An armature slot formed at the annular wall connects to and communicates with the bearing seat. The annular wall has a protrusion formed with a first air intake allowed to communicate with a positive or reverse air intake. Thereby, the first air intake can adjusted to be aligned with the positive or reverse air intake by rotation of the knob.

Abstract: Provided is a lubricating oil composition suitable for use in rotary pneumatic and reciprocating tools, comprising a Fischer-Tropsch base oil, a friction modifier based on synthetic ester and a sulfurized extreme pressure agent. The present lubricating oil composition has superior wear, friction and extreme pressure characteristics.

Abstract: A power driven tool for rotating a mechanical element. The tool includes a housing and motor. The motor has an output shaft. The shaft rotates relative to the housing. The tool also includes an impact drive axially fixed within the housing. The impact drive includes a base and an anvil shaft having an anvil. The impact drive includes an annular hammer having opposite impact lands pivotally mounted on the base for movement between three positions, including a forward position in which the hammer is positioned so one impact land engages the anvil, a reverse position in which the hammer is positioned so another of the impact lands engages the anvil, and a disengaged position in which neither of the impact lands engages the anvil. Further, the tool includes a ratchet mechanism. The ratchet mechanism includes an output drive mounted for rotation relative to the housing for rotating a mechanical element.

Abstract: Apparatus for tightening or loosening fasteners pneumatically, electrically, hydraulically and manually driven are disclosed, and in one example includes: a receiving member, rotatably supported in the apparatus for tightening or loosening, for receiving the fastener; a device for effecting rotation of the receiving member to tighten or loosen the fastener; and an apparatus which transfers a reaction force during tightening or loosening of the fasteners. The apparatus which transfers a reaction force includes: a first force-transmitting element rotatably attachable about a turning force axis of the device for effecting rotation; and a second force-transmitting element either rotatably attachable about, extensibly and retractably attachable along, or rotatably attachable about and extensibly and retractably attachable along at least a portion of the first element.

Abstract: A three-in-one pneumatic tool combining interchangeable tool heads with a standard pneumatic rotary drive assembly. The system includes drill, die grinder, and ratchet tool heads that may be attached/detached as desired from a pneumatic drive assembly. A quick-release coupling mounted at the mating end of the pneumatic drive assembly allows the user to easily insert the corresponding mating end of the various tool heads into the pneumatic drive so they may then be used in the same manner as their more traditional versions.

Abstract: A handgrip (1) for pneumatic machines (2) for machining surfaces, includes adjacent to one another, a delivery pipe (3) and a discharge pipe (4) for discharging the compressed air. The handgrip (1) consists of a first side cap (5) and of a second side cap (6) that are associated to enclose ergonomically the delivery pipes (3) and discharge pipes (4).

Abstract: A pneumatic screw driver includes: a tool body; a nose portion; a main air chamber; a hammering cylinder; a driver bit integrally combined with a hammering piston in the hammering cylinder; an air motor; a valve housing provided in an air passage between the main air chamber and the air motor; a stop valve piston provided in the valve housing; a stop valve stem coaxially provided with the stop valve piston; a timer chamber connected to the hammering cylinder; a first pipeline and a second pipeline respectively formed at upper and lower positions in a lower portion of the stop valve stem; and a upper end proximal portion of a contact member provided slidably in a driving direction. The upper end proximal portion of the contact member is provided engageably with the stop valve stem. The first pipeline and the second pipeline are arranged so as to close the first pipeline after closing the second pipeline by moving the stop valve stem upward from a bottom dead center.

Abstract: A pneumatic power tool includes a pneumatic motor mounted in a housing and supplied to pressured air through an air control unit to rotate a drive coupler, a coupling shell member surrounding the drive coupler and having axially opposite actuating and engaging regions, an output spindle having a bearing surface disposed between the drive coupler and the engaging region, and an override clutch unit coupling the drive coupler to the coupling shell member. An override movement of a driven clutch half on the engaging region brings the actuating region to move axially so as to force a latch to an unlatched position such that the air control unit is displaced to a shut-off state.

Abstract: A turbine drive system (10) for a downhole tool comprises a stator (12) and a rotor (14). The rotor (14) is mounted externally of the stator (12) and, in use, the rotor (14) is rotated relative to the stator (12) to drive the downhole tool. The stator (12) is provided with a through bore (15) for providing access through the drive system (10).

Abstract: A pneumatic tool with an improved soundproof device includes a housing whose rear end has a screw hole for supplying a high-pressure gas. The input high-pressure gas drives a pneumatic motor before it leaves the rear end of the housing. A cover covers the rear end of the housing. The cover has a penetrating hole. A guiding element has a guiding section that gradually expands outwards. The guiding element goes through the penetrating hole. An annular ventilation space is formed between the guiding section of the guiding element and the penetrating hole. A gas inlet connector is disposed in the screw hole. The shoulder part of the gas inlet connector stops the guiding element, so that the gas in the ventilation space is guided by the guiding section of the guiding element to escape.

Abstract: A rotationally driven air tool configured to be capable of retaining a lubricant in a gear of a rotation transmitting mechanism as long as possible has an air motor (14), a rotation transmitting mechanism (18) transmitting rotational driving force from a rotational output shaft (12) of the air motor to a rotary tool member (15), e.g. an abrasive disc, and a housing (28) having a motor chamber (20), a rotation transmitting chamber (22), a partition (24) between the motor chamber and the rotation transmitting chamber, and an air blow port (72) provided to extend through the partition to blow air discharged from the air motor toward a peripheral wall surface of the rotation transmitting chamber.

Abstract: An air driver device having a simple construction, being of a compact size, and having excellent durability. The air driver device is designed to shut off a supply of compressed air to an air motor, by means of a tightening torque control mechanism and a shut-off valve mechanism, in a case where the tightening torque reaches the set torque value. The air device is designed to tighten screw members at a prescribed tightening force, wherein the tightening torque control mechanism is composed of (i) a clutch unit, (ii) a driving piston on the back face of which is formed one clutch plate, so that clutch plates of the clutch unit may move by making rotational differential motions in a case where the tightening torque reaches the set torque value, (iii) a cylinder for storing this driving piston, (iv) a check valve for operating the shut-off valve mechanism, in linkage with the driving piston through an oil charged in the cylinder, and (v) a torque control member for regulating the set torque value.

Abstract: A drilling machine includes a motor housing, a gear box housing, a shaft driven by the motor and extending into the gear box housing, a drilling shaft extending through the gear box housing and having an outgoing channel arranged in the drilling shaft for supply/removal of a drill flow medium to/from a tool part that is connectable to the drilling shaft, a drill flow medium room, between the motor housing and gear box housing, that can be supplied with drill flow medium when the drilling machine is in operation, and an incoming drill flow medium conduit for the supply/removal of the drill flow medium to/from the drill flow medium room. The motor housing includes a detachable end cover which forms the rear unit of the drilling machine. The gear box housing includes a detachable end cover that forms the front unit of the drilling machine.

Abstract: A gas driven motor includes a housing, a gas driven rotating member including a rotor and a rotor shaft carrying the rotor and journalled in a first bearing and a second bearing supported in the housing, and a speed governor for controlling a pressure gas inlet flow in response to the rotation speed of the rotating member. The first bearing includes a set of rolling elements, an outer race arranged in the housing and an inner race arranged on a shaft portion of the rotating member, the set of rolling elements being in contact with the races on which the rolling elements roll. The motor further includes a coupling device arranged to couple the speed governor to the rolling elements of the first bearing, thereby transferring the rotary motion from the rolling elements to the speed governor.

Abstract: A pneumatic rotary tool comprises a housing, a square drive output member supported by the housing for rotational movement, and a pneumatic motor disposed in the housing for driving rotation of the square drive. A valve is disposed in the housing for rotary movement between a first position in which pressurized air powers the motor in a forward direction and a second position in which pressurized air powers the motor in a reverse direction. An actuator supported on the housing for translational movement is connected to the valve by a lost motion connection system. The lost motion connection system comprises first and second connector elements that are engaged for generally conjoint movement in a first direction and for relative sliding movement in a second direction generally perpendicular to the first direction.

Abstract: A system for use in a surgical procedure comprising a pneumatic instrument having an inlet and an outlet, a tank fluidly coupled to the inlet of the pneumatic instrument, wherein the tank provides pressurized helium gas to power the pneumatic instrument, and a compressor fluidly coupled to the outlet of the pneumatic instrument. The compressor receives the helium gas exhausted from the pneumatic instrument and compresses the exhausted helium gas to supply the tank with pressurized helium gas.

Abstract: A device for impacting a fastener in one embodiment includes a drive channel, a cylinder opening at an end portion to the drive channel, a microcellular polyurethane elastomer (MPE) bumper fixedly positioned at the end portion of the cylinder, the MPE bumper including a drive bore extending therethrough and aligned with the drive channel, and an outer wall defining a plurality of grooves extending radially about the MPE bumper, and a drive mechanism including a drive blade aligned with the drive bore.

Abstract: A fluid-powered tool actuator usable with a vehicle having an arm and a rotation link for rotation of the tool actuator in a first plane and being laterally tiltable in a second transverse plane. In some embodiments pressurized fluid is communicated using distribution channels and passageways internal to the actuator to limit use of external hydraulic lines. In some embodiments the tool actuator has certain components in a compressive pre-loaded state to reduce their fatigure failure during operation of the tool actuator under load.

Abstract: A pneumatic impact tool includes a handle, a work attachment coupled to the handle, an inlet and an outlet permitting air flow through the tool to drive the tool. A motor assembly is functionally positioned between the inlet and the outlet, the motor assembly having a rotor driven by the air flow, and the motor assembly defining a longitudinal motor axis about which the rotor rotates. An output drive is connected to the motor assembly to selectively rotate the output drive in response to rotation of the rotor. The output drive defines a longitudinal output axis about which the output drive rotates, such that the longitudinal output axis is substantially perpendicular to the longitudinal motor axis. An impact mechanism is functionally positioned between the motor assembly and the output drive, such that the impact mechanism drives the output drive with impact forces in response to rotation of the rotor.

Abstract: The present disclosure relates to a device for positioning and/or orienting, in the body of a patient, a surgical tool carried by a tool-holder, including a platform capable of being placed on the body of the patient, an orientable carrier, at least one part of which is rigidly connected to the tool-holder, means for guiding the orientable carrier rotationally relative to the platform in two directions of a plane parallel to the platform, at least 2 pneumatic actuators which engage with the orientable carrier such that a variation in pressure of at least one of the pneumatic actuators causes the orientable carrier to rotate in the first direction and/or the second direction, in which the pneumatic actuators are volumes that can deform in a predetermined direction as a function of the internal pressure.

Abstract: A power ratchet assembly has a handle, a power shaft, a sleeve, a crankshaft, multiple planet gears, multiple pins, two support bearings and a ratchet head device. The crankshaft has an outer surface. The support bearings are securely mounted around the outer surface of the crankshaft. Because the crankshaft is supported by the support bearings, the crankshaft is effectively stabilized so mitigating vibration of the crankshaft and reducing wear of the planet gears and noise and increasing useful life of the power ratchet assembly.

Abstract: A pneumatic air tool includes a housing with a forward angle gearing arranged in a gearing chamber, a motor chamber, a rear air outlet section and a forward air outlet section. The motor chamber includes a pneumatic motor with air communication openings, which communicate with both the rear air outlet section, and the forward air outlet section. A part of the outlet air is ducted through the forward air outlet section including a circular groove in the housing which form part of a cooling chamber. The walls of the groove form together an enlarged heat transferring surface by which the heat generated in the angle gearing is efficiently transferred to the cold exhaust air from the motor passing through the cooling chamber. By communicating exhaust air through the cooling chamber there is obtained an efficient cooling of the angle gearing while maintaining favorable outer dimensions of the housing.

Abstract: A quick assembly pneumatic tool may be connected to a tool bit and has a housing, an anvil casing, a rear cover, an air inlet assembly, a rotor assembly and an impact assembly. The housing has a handle and a rotor casing. The rotor casing is formed on the handle and has a front chamber and a rear chamber. The anvil casing and rear cover respectively cover the front and rear chambers. The rotor assembly is mounted in the rear chamber and is selectively driven by the air inlet assembly. The impact assembly is mounted in the front chamber and the anvil casing and is selectively rotated by the rotor assembly. The separate rotor and anvil casings allow the rotor and impact assemblies to be inserted respectively in the front and rear chambers so that assembling the pneumatic is easy and quick.

Abstract: An adaptive, ergonomic designed multi-purpose air motor driven hand-held trimmer that uses the air motor as the handle, has the air motor offset at an angle of 25 degrees to the fore and aft axis of the base plate and downward 10 degrees, to thereby have the center of gravity as near as possible to the wrist of the operator so that there will not be a constant bending of the wrist or exerting of constant hard pressure on the tissue at the base of the hand, thus virtually eliminating the possibility of the operator acquiring the carpal tunnel syndrome. Further disclosed are particular flexible drive shafts which may be used in the tool.

Abstract: A motor arrangement for a pneumatic tool includes a motor cylinder defining a motor chamber, an inlet passage adapted to receive a flow of motive fluid, forward and reverse passages communicating with the motor chamber, a throttle port, and at least one exhaust port. A motor rotor rotates in a forward direction in response to motive fluid flowing into the motor chamber from the forward passage and in a reverse direction in response to motive fluid flowing into the motor chamber from the reverse passage. A valve actuates to selectively place one of the forward and reverse passages in communication with the inlet passage for the provision of motive fluid from the inlet passage to the selected one of the forward and reverse passages. A throttle mechanism including a throttle actuator extends through the throttle port and is actuable to control the flow of motive fluid through the inlet passage.

Abstract: A handheld tool with a pneumatically operated linear oscillating drive is provided. The handheld tool has a motor housing and a piston movable in the motor housing, which separates the two working chambers of the motor housing from one another. A piston crown faces toward one chamber of the two working chambers, with a compressed air supply line toward the motor housing and a slide valve, which controls an alternating supply of compressed air to one and the other of the two working chambers, and with an exhaust air opening in the motor housing. The handheld power tool is distinguished in that the piston additionally has a piston skirt facing toward the other chamber of the two working chambers.

Abstract: A pneumatic tool having a rotational speed detection device includes a light blocking member mounted on a spindle and a sensor corresponding in position to the light blocking member. The sensor is electrically connected to a counter module. A display is to show a rotational speed. When the spindle starts to spin, the light blocking member will lock the light path of the sensor and the counter module will record the number of the times to count the rotational speed to be showed on the display, thus the user may read the rotational speed and make an adjustment on an air flow control module as necessary till the rotational speed reaches the desired speed.

Abstract: A pneumatic rotary tool comprises a housing, a square drive output member supported by the housing for rotational movement, and a pneumatic motor disposed in the housing for driving rotation of the square drive. A valve is disposed in the housing for rotary movement between a first position in which pressurized air powers the motor in a forward direction and a second position in which pressurized air powers the motor in a reverse direction. An actuator supported on the housing for translational movement is connected to the valve by a lost motion connection system. The lost motion connection system comprises first and second connector elements that are engaged for generally conjoint movement in a first direction and for relative sliding movement in a second direction generally perpendicular to the first direction.

Abstract: The present invention is directed generally to a system and method which employ a compressed gas-driven device with a passive thermodynamic composition. Certain embodiments provide a compressed gas-driven (e.g., CO2-driven) device implementation that includes a passive thermodynamic composition which allows for extended use of the device without freezing and without requiring a persistently-maintained, active (e.g., electrically-powered) heating. Further, certain embodiments provide a compressed gas-driven (e.g., CO2-driven) device implementation that includes a passive thermodynamic composition which allows for extended use of the device without freezing and without requiring an ignition heat source (e.g., electrically-powered or pyrotechnic as generator) for heating the device.

Abstract: A fastener-driving tool is provided with a cap assembly which includes a switch mechanism that permits the tool to be operated in one of two firing modes of operation. The switch mechanism comprises a two-position switch mechanism such that when the switch mechanism is disposed at a first one of its two positions, the tool will be able to operate in a fully automatic continuous firing mode of operation so as to continuously fire fasteners into a substrate as long as the workpiece contact element and the trigger mechanism are disposed at their depressed positions, or alternatively, when the switch mechanism is disposed at the second one of the two positions, the tool can be operated in a one-shot firing mode such that the tool can only fire a single fastener, either in accordance with, for example, a sequential-firing mode of operation or a bump-firing mode of operation, until the trigger mechanism is released and again depressed.

Abstract: The present invention provides a wheel cylinder brake adjuster. The main body of the adjuster has an actuating cylinder, a front seat, a rear seat, an intake handle and a baffle plate. There is a thrust set, and an assembly ring surface arranged at a rear end of the rear seat. First and second intake holes are arranged at intervals on the assembly ring surface. An air path switching ring is placed on the assembly ring surface. The first and second air holes are arranged at intervals on the inner ring surface and have interiors interconnected via a draining space. A pressure release state is made possible when the air path switching ring is rotated to the first rotation position. A plurality of spacing support parts are supported between the inner ring surface and assembly ring surface so that a spaced air leakage space is normally formed.

Abstract: A handheld tool includes a first power source, a second power source having a characteristic different from a characteristic of the first power source, and an operation part which is operated by a power from at least one of the first power source and the second power source to fasten a fastener.

Abstract: A fluid driven tool has an outer housing and an inner motor housing nested in the outer housing and defining a cavity therebetween that has a first end with a first exhaust passageway and a second end with a second exhaust passageway. The inner motor housing has a motor chamber with an inlet port for a fluid driven motor and fluid inlet, and an inlet manifold disposed in the cavity. The inlet manifold has a recessed portion with a surrounding seal that engages the inner motor housing and connects the fluid inlet to the at least one inlet port of the inner motor housing. An inner surface of the outer housing and an outer surface of the inner motor housing have portions that mate upon nesting the inner motor housing in the outer housing and provide reinforced areas for clamping regions of the outer housing located over the reinforced areas.

Abstract: A piston rod with a piston, against which a displaceable valve ring, a short, axially rigid striking pin, guided in a bush, and a pressure transformer piston are set, is immovably placed in one part of the supporting housing. A working tool is placed in the second part of the supporting housing in a tool bush protected on the outside by a lower sealing cover to prevent corrosion. A gas chamber is set up under the supporting housing, the pressure transformer piston and the striking pin. A pressure transformer cylinder and an equalizing chamber are formed between the piston rod and tfe pressure transformer piston. The striking pin is driven by a working fluid under pressure, which is distributed by a system of channels in the piston rod. The striking pin is driven onto the working tool in a striking action by high-pressure gas, which is pressurized in the gas chamber.

Abstract: The present invention provides a reciprocating pneumatic tool mechanism, including a casing, pneumatically-operated control module, control switch, actuating module and vibration-absorbing member. The plates of the actuating module are combined into a single body by the perforating locator. The periphery of the plates can be slidably abutted with the inner wall of the tank. The air inlet of actuating module is adapted air-tightly with air supply end of pneumatically-operated control module. At a front end of the actuating module, a protruding tube is screwed into a punch hole in front of the casing. The vibration-absorbing member includes a built-in buffer between actuating module and pneumatically-operated control module, and a front-mounted buffer between the front ends of actuating module and casing. With the invention, the vibration-absorbing members of reciprocating pneumatic tool is saved, improving the assembly efficiency, reducing assembly cost and volume with better economic efficiency.

Abstract: A turbo-gear supplied with operating fluid for driving a drill bit is proposed. It preferably comprises a non-rotatable casing, an upper shaft rotatably mounted in the casing, coupled with blades configured to receive pressure of the operating fluid causing rotation of the upper shaft, a lower shaft mounted in the casing, having inside a cylindrical channel, an intermediate shaft rotatably mounted in the casing, disposed below the upper shaft and above the lower shaft. The shafts are associated with each other through conventional gears having predetermined transmission coefficients. The inner space of the turbo-gear is configured to pass the operating fluid therethrough. Preferably, the turbo-gear is combined with a bushing-connector shaped as a hollow cylinder, having means for assembling with the turbo-gear and the bit. The turbo-gear is assembled with a non-rotatable string of pipes, through which the operating fluid is supplied. The turbo-gear allows extending the lifespan of pipes.

Abstract: A power driven tool for rotating a mechanical element. The tool includes a housing and motor. The motor has an output shaft. The shaft rotates relative to the housing. The tool also includes an impact drive axially fixed within the housing. The impact drive includes a base and an anvil shaft having an anvil. The impact drive includes an annular hammer having opposite impact lands pivotally mounted on the base for movement between three positions, including a forward position in which the hammer is positioned so one impact land engages the anvil, a reverse position in which the hammer is positioned so another of the impact lands engages the anvil, and a disengaged position in which neither of the impact lands engages the anvil. Further, the tool includes a ratchet mechanism. The ratchet mechanism includes an output drive mounted for rotation relative to the housing for rotating a mechanical element.

Abstract: A pneumatic impact tool includes a housing, an accumulation chamber, and a piston. The housing defines a longitudinal passageway with a rear end and a front end and a passageway gas port. The accumulation chamber has a accumulation chamber gas port connectable to a gas supply and a inner gas port in fluid communication with the longitudinal passageway. The piston is inserted in the longitudinal passageway and slides between a rest position wherein the piston is juxtaposed to the rear end of the longitudinal passageway and an impact position wherein the piston is juxtaposed to the front end of the longitudinal passageway. The piston moves from the rest position to the impact position when gas is inserted in the longitudinal passageway through the passageway gas port and is propelled therebetween by pressurized gas contained in the accumulation chamber.

Abstract: The invention relates to a tool (1), in particular an impact wrench, with a pulse unit (6) having a hydraulic impact mechanism (7) and a drive unit (24). The working volume (5) can be connected within the hydraulic impact mechanism (7) to an additional volume (4) formed outside of the mechanism. The tool according to the invention is characterised in that at least the compensating volume (4) can be varied independently of the pressure.

Abstract: An apparatus for bearing a tool against a workpiece includes: (a) a pneumatically driven motor unit rotating a drive shaft substantially about a longitudinal drive axis; (b) a process shaft coupled with the drive shaft for rotating the tool substantially about a longitudinal process axis; (c) a flywheel coupled with one shaft of the drive shaft and the process shaft; and (d) at least one urging unit coupled with at least one of the motor unit and the process shaft. The urging unit moves the tool with respect to the workpiece. The flywheel and the one shaft impart inertial rotational energy to the tool after the pneumatic motor achieves a predetermined rotational speed.

Abstract: A compact pneumatic hand tool having a cylinder assembly received in a space of a body, wherein, the bottom inlet opening of the cylinder assembly is communicated with the air inlet in the space, meanwhile, the rear inlet passage of the cylinder assembly is corresponded to the control knob mounting portion of the body. Moreover, a control knob is extended through the control knob mounting portion of body as well as the rear inlet passage of the cylinder assembly, and a rotor of the cylinder assembly is coupled with a second coupling portion of a striking assembly. In addition, the front opening of the body is covered with the front cap and a sealing pad is provided between the body and the front cap, meanwhile the central axle is extended out of the front cap.

Abstract: An improved pneumatic tool design includes pneumatic motor chamber that houses a turbine. An air path directs compressed air into the pneumatic motor chamber. The air path includes an air inlet chamber that at least partially surrounds the pneumatic motor chamber. The air path also includes a motor inlet disposed in one side wall (e.g., the top wall) of the pneumatic motor chamber forward of the rear end plate thereof. The air path further includes at least one exhaust port disposed in an opposite side wall (e.g., the bottom wall) of the pneumatic motor chamber. A high-pressure seal, such as an o-ring, surrounds the pneumatic motor chamber and isolates the motor inlet, which is thus at a rear outer portion of the pneumatic motor chamber, from a forward outer portion of the pneumatic motor chamber.

Abstract: A device for the high-speed drilling of boards for printed circuits and the like comprising a support (2), a drill head (11) with associated mandrel (12), and a device for locking and driving a bit (13) in the mandrel, wherein the mandrel is actuated by a compressed air turbine (33) and comprises means (40) for encoding the speed of rotation of the turbine adapted to generate a signal representing this speed, this signal being supplied to a control circuit (61) in order to drive a proportional valve (62) disposed in the circuit supplying compressed air to the turbine as a function of the speed of rotation encoded by the encoder means (40).

Abstract: A fluid-operated power tool has an engaging part including an engaging element for engaging and turning a threaded connector, and a drive part including a fluid-operated drive with a cylinder and a piston movable in the cylinder for turning the engaging element under the action of fluid admitted to the cylinder, the power drive part having a width which substantially does not exceed a width of the engaging part.

Abstract: A fluid-operated power tool has an engaging part with a turnable engaging element for engaging and turning a threaded connector, and a power drive part with a power drive operative for turning the engaging part, wherein the power drive part includes a fluid-operated cylinder-piston unit, the power drive part having an end spaced from the engaging part and provided with an inner opening with a first connection, and a reaction member formed as a reaction arm which is turnable between a plurality of positions around an axis of the power drive part and fixable in each of the positions, the reaction arms having a projection which is insertable in the opening and being provided with second connection with the first connection so as to connect the reaction arm with the power drive part.