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 pulse tool, in particular a pulse nutsetter, has a drive unit and a pulse unit driven by it. The pulse unit has at least one rotor with at least two vanes, a hydraulic cylinder surrounding it and a drive spindle protruding at one end out of the hydraulic cylinder through a front plate. The front plate is arranged between the rotor and a front cover, said cover being formed with a hydraulic fluid filling device. In order to improve a pulse tool of this nature, in that deviations from the desired pulse frequencies can be compensated in a simple manner and in particular already during the assembly of the pulse tool, the front plate has at least one bypass opening connecting the high-pressure and low-pressure chambers which are separated by the vanes. The invention also relates to an appropriate front plate.

Abstract: An intake and exhaust guide device for pneumatic tool including a handle, a pressure shunt connector, and two pressure tubes. The handle has a cylindrical hole. The pressure shunt connector is inserted into an outer end of the handle. The pressure shunt connector has a cylindrical hole and a screw hole forming an exhaust passage of the pneumatic tool. The cylindrical hole of the pressure shunt connector has an extension rod and an elongated hole with a ring-shaped groove. The extension rod is inserted through the elongated hole and connected to an intake screw hole of the handle. Each of the two pressure tubes is connected to one of the elongated hole and the screw hole of the pressure shunt connector.

Abstract: A compact pneumatic hand tool composed of a body, a cylinder assembly, a sealing pad, a striking assembly, a front cap, a control knob, a ventilation cap and threaded bolts. A first bearing is mounted around a rear end of the striking assembly and an outer rim of the first bearing is securely received in a central hole of the cylinder assembly. A second bearing is mounted on a central shaft of the rotor in the cylinder assembly. The control knob is mounted on the cylinder assembly. A front end of the central shaft of the striking assembly extends out of a front cap and the body is connected to the front cap via threaded bolts so that the striking assembly and the cylinder assembly are sealingly enclosed between the front cap and the body to accomplish the compact and light-weight requirements.

Abstract: A compact pneumatic hand tool composed of a body, a cylinder assembly, a sealing pad, a striking assembly, a front cap, a control knob, a ventilation cap and threaded bolts. A first bearing is mounted around a rear end of the striking assembly and an outer rim of the first bearing is securely received in a central hole of the cylinder assembly. A second bearing is mounted on a central shaft of the rotor in the cylinder assembly. The control knob is mounted on the cylinder assembly. A front end of the central shaft of the striking assembly extends out of a front cap and the body is connected to the front cap via threaded bolts so that the striking assembly and the cylinder assembly are sealingly enclosed between the front cap and the body to accomplish the compact and light-weight requirements.

Abstract: The switch mechanism for the reversible control valve of the pneumatic tool focuses on the switchover bar because of the users' right handed and left-handed issues. The primary feature is to make the switchover bar of the reversible control valve and the speed-adjusting valve to roll in the axial direction, and use the combination of the elastic component to make the combination and position section of the connecting section to position with the valve bar positioning section of the reversible control valve. When force of the connecting section of the switchover bar is pulled toward external trigger, it can release the combination and position section and the toggle switch of the switchover bar can achieve switching. When the toggle switch is adjusted, the repositioning may be restored by using the combination and position section and valve bar positioning section without having to take the parts apart.

Abstract: A power tool has a housing, a pneumatic rotation motor supplied with pressure air via an inlet passage, an outlet passage connecting the motor to an exhaust air discharge in the housing, and a speed governor for controlling the pressure air flow through the inlet passage responsive to the motor speed. The outlet passage includes a first outlet duct and a second outlet duct extending in parallel between the motor and exhaust air discharge, and an exhaust valve which controls exhaust air flow through the second outlet duct. The exhaust valve is spring biased toward a closed position and shifted to an open position by an activator which is exposed to the air pressure in the inlet passage downstream of the speed governor and which shifts the exhaust valve to the open position at pressure levels above a certain pressure level in the inlet passage downstream of the speed governor.

Abstract: An air tool with two exhaust pipes has a case that holds an air inlet, an air motor, an inlet switch for controlling the operation of the air motor, and an action element driven by the air motor. Both sides of the air tool are provided with an exhaust pipe connecting to the air motor. During the operation of the air tool, the exhaust is expelled via the two exhaust pipes simultaneously.

Abstract: A portable power tool having a turbine unit (10a, 10b) is proposed, which is intended to be driven by a suction air flow (12a; 12b), and having a gearing unit (14a; 14b; 14c) via which the turbine unit (10a, 10b) is coupled to an output unit (16a; 16b; 16c).

Abstract: A pneumatic power tool includes a housing, a motor, a pressure air inlet passage, an exhaust air outlet passage, and an exhaust air outlet flow deflector. The exhaust air outlet flow detector includes an outlet piece with radial as well as axial outlet openings and a valve element with radial as well as axial apertures. The outlet piece and the valve element are rotatable relative to the housing as well as to each other to bring a radial opening of the outlet piece into or out of alignment with a radial aperture of the valve element (21), and at the same time to bring the axial apertures of the valve element out of or into alignment with the openings of the outlet piece, thereby shifting the exhaust outlet flow direction as desired between a radial direction and an axial direction.

Abstract: A rock drilling machine (1) having, on a machine housing (2), a first attachment element on a first attachment side (13) for its fastening to a slide member which is movable back and forth along a feed beam, the attachment element having a contacting surface (17) for co-operation with a contacting element supported by the slide and a fastening element (18, 19) for the engagement with fasteners co-operating with the slide. The machine is distinguished by the rock drilling machine (1) being provided also with a second attachment element on a second attachment side (15), the second attachment element being configured similarly to the first attachment element, having a contacting surface (17) and fastening element (18, 19), to allow the rock drilling machine (1) to be fastened to the slide member also with the second attachment element. A rock drilling system has the rock drilling machine as one of its components.

Abstract: A pressure regulating air valve assembly (100) for a pneumatic tool (90) is disclosed that is movable between an open position and a closed position such that the maximum pressure in the tool is limited to a predetermined value. The valve assembly include a fitting (110) with a central aperture (112) and an upper portion (114). A valve plate (130) is disposed in the fitting, and a collar (140) having an aperture (146) is retained in the fitting. A proximal end of a tubular piston (120) extends through the aperture, and a spring (118) biases the piston toward an open position. When the pressure in the hand tool exceeds a predetermined value, the pneumatic force on a distal annular head (126) of the piston urges the piston toward the valve plate (130), closing the valve. The valve plate may include a centering portion (134) and an elastomeric panel (136).

Abstract: A method for assembling a front cover to a bush in a pneumatic tool is to perform a leading operation first in which a blank of front cover is worked with hydraulic forming and being roughly machined and a blank of bush is roughly machined and heat-treated and the then the front cover is joined tightly to the bush before a process of surface treatment being conducted to obtain a finished piece. Hence, in addition to work efficiency and precision of the integral structure of the pneumatic tool being enhanced, it is capable of extending life span and lowering production cost of the pneumatic tool substantively.

Abstract: An air cylinder for pneumatic tool includes a cylinder body, and front and rear cylinder caps covered onto two ends of the cylinder body. The cylinder body defines a cylinder chamber for mounting a rotor therein, and has an air passage with two open ends of the passage respectively located at two ends of the cylinder body. The rear cylinder cap is provided with an air inlet that is aligned with the air passage and has an inner end communicable with the cylinder chamber. A guide opening is formed on an inner end surface of the front cylinder cap to communicate the air passage with the cylinder chamber. At least one of the two cylinder caps is provided with a predetermined number of exhaust holes communicating with the cylinder chamber for discharging exhaust air. Therefore, the cylinder chamber may be easily processed to form smooth inner wall surface and to reduce wearing of vanes on the rotor.

Abstract: A pneumatic motor includes a shell, two covers, a cylinder and a rotor. The shell defines a space, at least one inlet in communication with the space and at least one outlet in communication with the space. Each of the covers defines at least one radial channel and at least one arched channel in communication with the radial channel. The covers are disposed in the central space of the shell while the radial channel is in communication with the inlet. The cylinder defines a central space and at least one inlet in communication with the central space. The cylinder is located between the covers so that the central space thereof is in communication with the arched channels of the covers and that the inlet thereof is communication with the inlet of the shell. The rotor includes a plurality of fins movably mounted thereon.

Abstract: An inlet air way control structure of an air tool includes a valve sleeve mounted on an inlet channel inside the air tool and communicated with a first inlet air way and a second inlet air way, and a control shaft penetrating the valve sleeve, thereby the control shaft can change the inlet air way of the air tool so that the air tool can be controlled to have a clockwise or counterclockwise rotation. Moreover, the valve sleeve has a fixing element for being fixed with the cylinder, and thus the inlet air way control structure of the present invention can be applied to a plastic housed air tool. Furthermore, owing to the control shaft, the user can operate the rotation direction of the air tool by only one hand so as to achieve a great convenience.

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: An adjustable exhaust assembly for a pneumatic fastener includes a base, which includes a base plate and a protrusion protruding from the base plate. The protrusion is centrally hollow and includes an inner surface and an outer surface. The base plate includes an inlet opening and an exhaust opening defined therethrough. The inlet opening is interconnected with a channel defined by the inner surface of the protrusion. A cap is coupled to and supported by the base and includes an exit opening. A quick connector coupler is positioned inside the channel defined by the inner surface of the protrusion. When coupled to a pneumatic fastener, the quick connector coupler is suitable for connecting to an air supply hose to input compressed air to the pneumatic fastener via the channel defined by the inner surface of the protrusion and the inlet opening, and exhaust from the pneumatic fastener may exit through the exhaust opening and the exit opening.

Abstract: The invention relates to drilling or rockbolting machines, for the execution of underground works, in particular in mining operations. The carrier vehicle comprises a chassis and four wheels, all driving wheels, with two wheels situated on the right-hand side of the chassis of the vehicle and two other wheels situated on the left-hand side of the chassis. The four wheels are of the independent suspension type, having a jack-controlled height, and each comprise rotation-drive means, especially hydraulic motors. The chassis receives, at the front and at the rear, working equipment, such as drilling arms with respective guides, the basic position of which is horizontal and transverse to the direction of displacement of the vehicle. This carrier vehicle is applicable to the realization of a machine, which can be used in mine galleries of low height.

Abstract: A pneumatic motor having a motor chamber having an inner surface with an eccentric longitudinal axis, a motive gas fluid inlet, and at least one end wall located transversely to the longitudinal axis with an exhaust aperture located therethrough. A rotor is rotatably disposed in the motor chamber on the eccentric longitudinal axis and having a plurality of radial slots, the rotor defining a first rotational position with respect to the longitudinal axis at which the distance between the rotor and the motor chamber is a minimum. A plurality of vanes is slidably carried within the plurality of radial slots and rotationally moving between the fluid inlet and the exhaust aperture during rotation of the rotor.

Abstract: A flow guide configured for insertion in a cavity defined between an outer housing and a nested inner motor housing of a fluid driven tool. The flow guide defines a longitudinal axis and includes at least two longitudinal portions disposed parallel to the longitudinal axis and defining a longitudinal channel therebetween, and a rib being substantially circumferential and connecting the longitudinal portions at points defining a plane substantially transverse to the longitudinal axis. The rib defines a recess that permits fluid communication in the longitudinal channel across the rib.

Abstract: A portable tool comprising a spindle defining a longitudinal axis, a spring extending around the spindle in the axial direction for biasing a component of the tool, a stop ring extending around the spindle and against which the spring bears. The spindle includes a plurality of circumferentially spaced radially outward projections and the stop ring includes on its internal surface a corresponding plurality of recesses extending from the bearing face of the stop ring to an opposite face, and a corresponding plurality of pockets open at the opposite face. During assembly, the stop ring is fitted over the spindle or sleeve by the passing the recesses over the projections and then rotating the stop ring to align the pockets with projections. The stop ring is axially fixed on the spindle by the pockets engaging the projections under the biasing force from the spring.

Abstract: A pneumatic tool includes a housing, a driving mechanism, a rear cap, a direction controller, a speed controller, and an operating member. The housing is formed with a component chamber and an intake passageway. The driving mechanism includes an output shaft rotatable about a rotary axis. The rear cap defines a cap chamber in spatial communication with the component chamber, and has a connecting passageway that intercommunicates the cap chamber and the intake passageway. The direction controller and the speed controller are mounted in the cap chamber for rotation about the rotary axis. The operating member is coupled to the direction controller, is accessible externally of the rear cap and the housing, and is operable to drive rotation of the direction controller about the rotary axis, thereby controlling direction of rotation of the output shaft. The speed controller is operable to vary torque and speed of the output shaft.

Abstract: The invention comprises retrofit kits for power impact tools. The retrofit kits adapt modular control apparatuses to power impact tools that where not originally manufactured to receive a modular control apparatuses. The retrofit kits comprise a modular control apparatus and at least one fastener. The modular control apparatus may be specially manufactured to adapt retrofit tools or an adapter may be included in the kit. Adapters intercept the energy flow to the motor of the tool and re-channels the energy flow through a modular control apparatus, which then controls the flow of energy to the motor. The retrofit kit may include instruction sheets describing and illustrating the methods of using the retrofit kit.

Abstract: The invention relates to a hydraulic ratchet wrench with a double-action hydraulic cylinder piston drive with a gear pump (20) and a piston pump (21). According to the invention, a working stroke and a return stroke are controlled through a reversal of rotational direction of a pump motor (4), whereby the necessary flow volume is produced automatically via internal flow control valves, and without additional valve controls.

Abstract: An air drill includes a body having a grip portion having an air supply passage and an air exhaust passage formed therein, a trigger portion formed above the grip portion and supporting a trigger, and a cylinder portion formed above the trigger portion and accommodating an air motor. A reverse valve is disposed within the cylinder portion in order to switch the direction of rotation of the air motor between forward and reverse directions. Two reverse levers are disposed in an upper portion of the reverse valve and slidably accommodated in two slit-shaped openings, respectively, which are formed in a grip-portion-side end of the cylinder portion.

Abstract: A controlling mechanism of pneumatic tool. The controlling mechanism is formed with a radial hole in which a speed adjustment button and a direction switching button are disposed. A pad member is disposed between the speed adjustment button and direction switching button. The speed adjustment button is formed with an axial through hole in which a pin member is inserted. One end of the pin member is formed with a through hole. A valve rod is passed through a through hole of an inlet passage of the main body of the pneumatic tool and inserted into the through hole of the pin member. When the pin member is driven, the valve rod is driven to bias a valve plate, whereby the air can get into the main body of the pneumatic tool.

Abstract: A universal suction attachment for pneumatic power tools includes a housing having a tool coupling portion, a duct portion, and a focused outflow portion. The tool coupling portion is capable of connection to an exhaust port of the pneumatic power tool such that exhaust air from the tool is captured therewithin. The focused outflow portion is capable of connection to a vacuum conduit and to a collection tube. A duct is provided throughout the duct portion, providing flow between the tool coupling portion and the focused outflow portion. In use, exhaust air from the power tool that is captured within the tool coupling portion is ducted through the duct portion and into the focused outflow portion. A resulting flow of the exhaust air creates a vacuum in the vacuum conduit to transport debris to the collection tube.

Abstract: A hydraulic motor, especially for driving of rotating tools, consisting of a chamber (2) provided with an inlet (10) for supplying fluid, and with at least one outlet hole (6), before which, on a holding device, a rolling rotor (7) is seated, the rolling rotor (7) is formed by a body of rotational shape. That the chamber (2) is at least in its internal surface of rotational shape and of a tapering diameter. The chamber (2) is on its side of the maximum diameter open, and on the side of its minimum diameter limited by means of a wall (3), in the middle of which a hole (4) is provided, through which a shaft (5) passes with a clearance, the shaft (5) carrying the rolling rotor (7). The shaft (5) is inside the chamber (2) provided with a recess (8), the diameter of which is larger than the diameter of the hole (4) in the wall (3).

Abstract: The invention concerns an hydraulically powered mechanism of the kind having a piston assembly which is arranged to be driven by hydraulic fluid acting on it in a working zone and an item of equipment which is to be driven by the piston assembly. The piston assembly presents a face which acts at an interface against a complemental face on the item of equipment. A fluid passage is provided to supply hydraulic fluid from the working zone to the interface for lubrication purposes. In a specific application of the invention it may be used in the rotary indexing mechanism of an hydraulically powered, typically a water-powered, rockdrill.

Abstract: A turning device for compressed air tools. which is operated by a compressed fluid, is provided with a housing and with a rotor, which is rotatably arranged in a front housing part and into whose turbine element the fluid, which is under pressure, can flow, has a braking arrangement and a switch for the compressed fluid. The switch which is operatively connected with the braking arrangement and is arranged on a rear housing part in line with a compressed fluid supply conduit. Such a turning device requires fewer components and can be stopped in a simpler and faster way by a fluid switch, in the form of a sliding switch, which encloses the rear housing part in the area of the supply conduit and is provided with axially oriented control pins, which are connected, fixed against relative displacement, with a brake disk of the braking arrangement.

Abstract: An air-input speed regulator for pneumatic tool includes an air intake connector having a seat and a tubular portion, and a regulating knob rotatably mounted around the connector. An axial channel is provided at one side of the seat of the connector for elastically receiving a steel ball therein, and front and rear air holes are axially sequentially formed on the tubular portion. The regulating knob includes a tube portion, a front end of which is formed into steps gradually lowered in a circumferential direction, and hollow projections spaced along an inner wall surface corresponding to the steps for engaging with the steel ball on the connector to locate the regulating knob in place. By turning the regulating knob, one of the steps is brought to cover the rear air hole by different extent and therefore changes the amount and speed of air flown to the pneumatic tool.

Abstract: A pneumatic tool structure including a main body integrally having an elbow. A pneumatic motor, a switch unit and an intake unit are disposed in the main body. A driving unit is disposed in the elbow. The elbow has a top section formed with an opening corresponding to the main body. The pneumatic motor is placed into the main body from upper side through the opening. A cover is disposed on the elbow for closing/opening the opening.

Abstract: A turning device (11) for compressed air tools (10). which is operated by a compressed fluid, is provided with a housing (16) and with a rotor (12), which is rotatably arranged in a front housing part (17) and into whose turbine element the fluid, which is under pressure, can flow, has a braking arrangement (14) and a switch (36) for the compressed fluid, which is in operative connection with the braking arrangement (14) and is arranged on a rear housing part (21) in line with a compressed fluid supply conduit (26). So that such a turning device (11) requires fewer components and can be stopped in a simpler and faster way by means of a fluid switch (36), a sliding switch (36) is provided, which encloses the rear housing part (21) in the area of the supply conduit (26) and is provided with axially oriented control pins (41), which are connected, fixed against relative displacement, with a brake disk (44) of the braking arrangement (14).

Abstract: A power tong 10 for making up and breaking apart threaded oilfield tubular connections includes a frame 11 having an open throat 20, a rotary ring 16 having an open throat 22, and a door 24 for closing over the open throat for safety. Hydraulic motor 42 is regulated by a control valve 52 for rotating the ring 16 which in turn rotates the oilfield tubular. A switch 46 responsive to the position of the door 24 controls the flow of air pressure to a cylinder 50, which renders active valve operator 54 which controls valve 52. According to the method of the invention, the door 24 must first be closed so that the switch 46 renders the valve operator 52 active, and the valve operator 52 must be reset once the door is opened before it can be manipulated to operate the motor control valve 52.

Abstract: The invention is a pneumatic tool with a reverse valve having an overdrive. In particular, the pneumatic tool includes a housing, a rotor, rotatably mounted within the housing, an output shaft operatively coupled to the rotor, and pressure chambers defined between the housing and the rotor. A pneumatic reverse valve having an overdrive is operatively coupled to the rotor. The overdrive provides increased torque and increased speed to the output shaft. The reverse valve controls flow of pressurized air to a multi-chambered motor of the tool such that the direction of the motor can be reversed and the number of pressure chambers receiving pressurized air can be selected regardless of direction.

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: The present invention relates to an impulse wrench for use in conjunction with a fastener engaging tool and a power supply to selectively rotate threaded fasteners. The wrench comprises a housing and an impulse manifold rotatably mounted within the housing. An impulse piston is mounted inside a impulse piston receiving space for reciprocating movement and has an impulse delivering surface and a pressurizing surface. The piston and the piston receiving space are constructed and arranged such that the pressurizing surface and an outer end portion of the piston receiving space cooperate to define at least a portion of a high pressure chamber which is filled with a substantially incompressible fluid.

Abstract: A particle separator and a pneumatic tool incorporating the same for separating particles from a fluid passed therethrough. The particle separator includes an inlet passageway having an upstream end and a downstream end and an inlet which is in fluid communication with the downstream end of the inlet passageway. A separation passageway is connected to the downstream end of the inlet passageway and connected via a substantially "U"-shaped passageway to a chamber. The inlet passageway, separation passageway, and substantially "U"-shaped passageway are connected in fluid communication to provide a flow path to the chamber. In one embodiment, the chamber of the particle includes a removable plug. In another embodiment, the chamber is vented to provide a bleed-path from the separator passageway to and out of the chamber. Preferably, the bleed-path comprises a labyrinth seal which in a preferred embodiment includes a plug having threads disposed within the chamber.

Abstract: A replaceable, flexible and resilient grip is slidably fitted over a generally cylindrical handle portion of a power hand tool housing. In one embodiment, for use with a pistol grip housing with a separable end cap, the grip has a flange which is clamped between the end cap and the barrel of the housing and has lugs which fit in recesses in the barrel and end cap. The grip also has a strap portion which fits between the trigger and the barrel and a flange which fits in a groove adjacent to the barrel. In another embodiment, the tool has an air exhaust port adjacent to the handle portion and the grip defines an exhaust air passage alongside the handle portion, the grip being held in place by a retaining plate.

Abstract: A compressed-air-operated percussion mechanism includes a housing, a percussion body and a balancing body, which form an operating chamber therebetween. A secondary valve seals the operating chamber during an operating stroke and opens the chamber to evacuate compressed air after the termination of the operating stroke. A primary valve is connected to the compressed air inlet passage and intermittently opens to provide compressed air to the operating chamber.

Abstract: A fluid-operated power tool has an engaging part with a turnanble 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.

Abstract: A pneumatic tool includes a housing defining an air inlet and first and second exhaust passages and an air motor fluidly coupled to the air inlet and disposed in the housing. The motor produces exhaust air in operation and is fluidly coupled to the first and second exhaust passages. The tool also includes an exhaust valve carried by housing for selectively opening and closing only the second exhaust passage.

Abstract: An air cylinder apparatus for a pneumatically driven power tool includes a unitary outer cylinder member, which has a bearing plate and a hollow cylindrical wall. A cylindrical chamber is formed eccentrically in the cylindrical wall. A bearing member is mounted removably on an end of the cylindrical wall. A cylindrical inner wall member is press fitted within the cylindrical wall of the outer cylinder member, and has two spaced adjacent axial sides that define an open-ended axial slot therebetween. The inner wall member can be compressed in a radial direction for removal from the outer cylinder member. Because the outer cylinder member is molded, the power tool can be manufactured easily and conveniently.

Abstract: The present invention relates to a pneumatic tool having a housing including a motor housing portion which is pneumatically and securely connected to a handle housing portion. The motor housing portion has a motor housing exhaust opening with a motor housing exhaust opening port therethrough. The motor housing exhaust opening port functions to direct pressurized air from a forward direction to a sideways direction.

Abstract: A pneumatic surgical tool for cutting bone during surgical procedures includes a pneumatic motor having a rotary shaft, a resecting tool having a cutting element rotated by the motor, a chuck sleeve to surround and support the resecting tool, and anti-friction bearings for further rotatably supporting the resecting tool. The rotor and chuck sleeve are formed of an electrically nonconductive material. The resecting tool is formed of titanium. The bearings are formed of a ceramic, composite or plastic material.

Abstract: The present invention is to offer a filter/regulator for pneumatic tool, comprising a pipe with two end openings capable of respectively of jointing the air outlet of air compressor and the intake port of pneumatic tool, a filter core in the pipe, a fixing member to fix the filter core in the pipe, and a rotatable regulating knob with a through hole to pass through a lateral shaft hole on the pipe; based on the foregoing structure of filter/regulator, the filter core in the pipe can filter the oil, moisture and other heterogenities in the air and prevent the said foreign matter and heterogeneities from invading into the pneumatic tool and assure the life and quality of using the pneumatic tool, and the regulating knob can regulate the volume of air flow according to the user's requirement.

Abstract: A threading attachment for internal or external threading includes a spindle head (1) which is intended to be attached to a spindle on a machine tool and also a tap holder (5) with a holder body (6) in which a tap (13) is arranged during the threading work, the spindle head (1) and the tap holder (5) being extended along a joint axle. The tap holder (5) and the holder body (6) respectively have in threading position a power transmitting connection to the spindle head (1) via driving members (15, 16 and 28, 29, respectively) and have in back out position freely rotatable in relation to the spindle head (1) and arranged to be effected by a compressed medium via a driving member (18). The driving member can be a reaction turbine or an action turbine.

Abstract: A pressure amplifier can be mounted above a drill bit at the lower end of a drill pipe for generating an increased fluid pressure in a drilling fluid flow to, for example, obtain an increased drilling effect, A reciprocating piston in a cylinder has at one side (a low pressure side) a large piston area and also has a first opposite piston area and a second opposite and relatively small piston area, which generates an increased pressure. A valve device controls drilling fluid flows to and from the piston. Beyond one end of the cylinder there is provided a hydraulic rotary motor adapted to be driven by the pressure difference between the drilling fluid flows in the drill pipe and an annulus. A transmission mechanism converts the rotation of the hydraulic motor into intermittent movements of the valve device between two operative positions.

Abstract: 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.