Abstract: An impact driver includes an outer sleeve, an inner core, at least one first pin, a moving mechanism, and a shank. The inner core is telescopically and rotatably received in the outer sleeve. The inner core has at least one first helix groove therein. The first pin slidably protrudes from the inner surface of the outer sleeve. The moving mechanism can move the first pin to fit the first helix groove. The shank is connected to the inner core.

Abstract: A multi-impact hand tool comprises a sleeve, a tool head, a movable rod, a spring and an impact block. With only one impact operation, the multi-impact hand tool can provide a multi-impact effect, thus improving the working efficiency. In addition, the impact force can be directly transferred to the tool head for performing the chiseling operation, thus improving the working efficiency.

Abstract: A device and system for applying rotational impact to screws implanted in bony tissues. Specifically, embodiments of the present disclosure may provide medical professionals the ability to apply impact forces and torques to a threaded member in a rotational plane such that the surrounding tissues are not damaged from an axial impact or excessive rotational forces. The rotary impact driver may be used with thin and flexible shafts for percutaneous procedures.

Abstract: A ratchet device includes a housing having a number of teeth formed in a chamber of the housing, a follower having a stem engaged into the housing, a pawl disposed in the follower and having a number of teeth for engaging with the teeth of the housing, and a control ferrule attached to the follower and anchored between the follower and the housing and coupled to the pawl for controlling the teeth of the pawl to selectively engage with the teeth of the housing in order to control the rotating direction of the housing by the follower. An actuating member is attached to the control ferrule, and a spring member is attached to the actuating member and engage with the pawl for coupling the control ferrule to the pawl.

Abstract: A clevis removal and installation tool comprising a socket with a centrally disposed engagement member within the socket, the engagement member perpendicularly anchored to a midline of the interior of the socket, the socket with an opening for removably fitting over a clevis, with the engagement member between two arms of the clevis, an engagement boss on an end opposite the socket opening, the boss comprising a square female opening, the opening for removably receiving a drive tool.

Abstract: A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a support seat, a cam, a cover, and a hammer. Thus, the pivot shaft of the hammer has two opposite sides each formed with a reinforcing rib to reinforce the structural strength of the hammer. In addition, each of the first pivot shaft and the second pivot shaft has a guide groove to overcome the shear stress applied on the hammer during the rotation striking process of the hammer, thereby preventing the hammer from being distorted or broken due to concentration of a stress so as to enhance the lifetime of the hammer.

Abstract: A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a cylindrical support seat, a cam, a cover, and a hammer. The hammer has a protruding engaging portion and a reinforcing rib juxtaposed to the engaging portion to reinforce the structural strength of the hammer. Thus, the two opposite sides of the hammer are connected by the reinforcing rib to reinforce the structural strength of the hammer, thereby preventing the hammer from being distorted or broken due to concentration of a stress so as to enhance the lifetime of the hammer.

Abstract: The invention relates to a device utilizing compressed air for loosening and tightening fasteners that are located in hard to access areas. The device enables a single operator to stabilize the device while applying pressure via a pneumatic hammer to loosen or tighten fasteners. The device uses socket principles that enable the user to switch the sockets and provide a wide variety of options to accommodate the shapes and sizes of the fasteners.

Abstract: An automatic jar lid opener comprises a cylindrical housing and a truncated conical lid retainer rotatably attached to the cylindrical housing. A rotary hammer assembly is installed in the housing to convert a torque output from a motor assembly in the housing, into a twisting impact force applied through the lid retainer to a threaded jar lid in order to break a seal or initial resistance securing the lid screwed on a jar.

Abstract: A screwdriver comprises a handle and a shank. The handle is provided at a head end with a percussion block. The shank is put through the interior of the handle such that one end of the shank is fastened with the percussion block, and that other end of the shank is extended out of other end of the handle. The shank is provided on the other end thereof with a percussion-rotation mechanism which is in turn fastened with a tip. The mechanism enables the tip to turn instantaneously at the time when the percussion block is impacted.

Abstract: A wrench set includes a drive handle with an impact end and a drive end. The drive end engages a drive wrench having a slot which receives the drive end of the drive handle. The opposite end of the drive wrench includes a laterally projecting or transversely projecting drive socket connection for attachment of any one of a set of sockets.

Abstract: An impact wrench (1) having a handle (3), an arm (7) pivotally connected to the handle (3) and of unitary construction with the handle (3), and a key (11) on the arm (7) for coupling with a keyseat of a wrench tool, such as a socket of a socket wrench. An impact surface (2) is located at an upper end of the handle (3) and has an impact-resistant cap (5). In use, a socket is fitted to the key (11) and placed into engagement with a nut or bolt which needs to be loosened. Striking the cap (5) with a hammer in the direction of arrow 17 causes rotation of the arm (7) and the socket and for the nut or bolt to loosen.

Abstract: An impact wrench (1) having a handle (3). an arm (7) pivotally connected to the handle (3) and of unitary construction with the handle (3), and a key (11) on the arm (7) for coupling with a keyseat of a wrench tool, such as a socket of a socket wrench. An impact surface (2) is located at an upper end of the handle (3) and has an impact-resistant cap (5). In use, a socket is fitted to the key (11) and placed into engagement with a nut or bolt which needs to be loosened. Striking the cap (5) with a hammer in the direction of arrow 17 causes rotation of the arm (7) and the socket and for the nut or bolt to loosen.

Abstract: A power tool in the nature of an impact tool in which a quick release mechanism for retention, and selective quick release of an accessory is provided. The quick release mechanism is actuated by a release pin disposed beneath the surface of the tool so as to be out of harms way, and actuation of the quick release mechanism is achieved by digital depression of the pin which in turn releases a latch engaging the accessory, permitting its removal from the tool.

Abstract: A spanner has a handle, a head frame connected to the handle, a drive head device, a pair of reinforced plates, and a pair of arm plates. The head frame has a pair of parallel panels, and a spacing formed between the parallel panels. Each parallel panel has a first pivot hole, a second pivot hole, and a third pivot hole. The reinforced plates and the arm plates are inserted in the spacing of the head frame. Each arm plate has a square hole and a round hole. Each reinforced plate has a round aperture and a circular aperture. The drive head device has a round head. The round head of the drive head device passes through the first pivot hole of each panel and the square hole of each arm plate. A gasket is disposed on one of the panels. A bolt passes through the gasket to be engaged with the round head of the drive head device. A first pin fastens each panel, each reinforced plate, and each arm plate pivotally. A second pin fastens each panel and each reinforced plate pivotally.

Abstract: A screwdriver includes a handle in which a chamber and a recess are respectively defined in two ends of the handle. An annular flange with a passage extends radially inward from an inside of the handle. A block and a spring are received in the chamber, and an impact rod with a spring mounted thereto is received in the recess. A tube extends from the handle and a shank is movably received in the tube so that on end of the shank contacts the impact rod and the other end of the shank contacts a bit engaged with a distal end of the tube. The block is pushed to compress the spring when the bit is pushed onto an object. When the impact rod drop into the dent, the block hit the impact rod and the bit exerts a sudden and large force to the object.

Abstract: A portable pneumatic tool includes a housing composed of two symmetric half shells or several partially cut-away shells; an air inlet module unit, a valve actuating module unit and an operating (or functioning) module unit fluidically communicated with one another and connected with flexible hoses among the module units; and a shock-absorbing unit retained between the operating module unit and the housing; whereby upon embedding or fixation of all the module units into the corresponding cavities in the shells and upon combination of the shells, a portable pneumatic tool will be instantly obtained having advantages of light weight, shock-absorbable property, easy assembly, lower production cost and convenient maintenance.

Abstract: A ratchet wrench for turning bolts and nuts disposed in narrow or inaccessible places. The ratchet wrench is rotatably attached to an end of an operation rod. The ratchet wrench comprises a weight attached to the operation rod, the weight being slidable lengthwise along the operation rod, the operation rod being provided at a portion thereof in front of the weight with a front weight receiving portion against which the weight is struck. Alternatively, the operation rod may be provided at a portion thereof in the rear of the weight with a rear weight receiving portion against which the weight is struck. Also, the operation rod may be provided with both the front weight receiving portion and the rear weight receiving portion.

Abstract: A socket wrench has a body with a handle, and a head with a hollow cavity. A ratchet mechanism is received in the cavity and has a drive shank for connection with a socket. The ratchet mechanism is pivotally connected to the head in order to allow the head to pivot relative to the ratchet mechanism in an arc along a limited path of travel. The pivotal connection between the head and the ratchet mechanism enables an impact force to be presented to the socket when desired. Optionally, a releasable lock member is provided to prevent relative movement of the head and the ratchet mechanism so that the socket wrench can be used in a manner similar to a conventional ratchet wrench.

Abstract: A rotational actuator includes an actuator case, a first rotor supported on the actuator case for rotation about an axis of rotation, a second rotor supported on the actuator case coaxially with the first rotor and for rotation independent of the first rotor, an expandable member having one end secured to the second rotor and the other end secured to the first rotor for relatively rotating the first and second rotors by expansion or contraction thereof, and an expandable member controller for controlling the extent of expansion and contraction of the expandable member. The momentum of the first rotor in the rotational direction thereof when the expandable member is expanded or contracted is set to be higher than the momentum of the second rotor in the rotational direction thereof at this time.

Abstract: A socket wrench has a body with a handle, and a head with a hollow cavity. A ratchet mechanism is received in the cavity and has a drive shank for connection with a socket. The ratchet mechanism is pivotally connected to the head in order to allow the head to pivot relative to the ratchet mechanism in an arc along a limited path of travel. The pivotal connection between the head and the ratchet mechanism enables an impact force to be presented to the socket when desired. Optionally, a releasable lock member is provided to prevent relative movement of the head and the ratchet mechanism so that the socket wrench can be used in a manner similar to a conventional ratchet wrench.

Abstract: A wrench for producing unbalanced vibrational forces which are transmitted to a bolt turned by the wrench. The wrench produces counteracting torque forces which act on the sides of the wrench handle to facilitate the production of unbalanced vibrational forces.

Abstract: This invention relates to an impulse wrench which has two blades but generates only one impact pulse on the main shaft per one rotation of a liner. In this invention, a liner has at least four seals and a main shaft has at least two seals. And the shape of both or one of the two seals out of at least two seals of main shaft is other than a linear shape parallel to the axial center.If both of said two seals of main shaft are in said shape, two of at least four seals of liner are in the same shape. The other seals of liner are in a linear shape parallel to the axial center.If one of said two seals of main shaft is in said shape, one of at least four seals of liner is in the same shape as this. All of the other seals of liner are in a linear shape parallel to the axial center.In this way, said two seals of liner and said two seals of main shaft coincide with each other only once per one rotation of the liner.

Abstract: An improved hydraulic pulse wrench provided with a hydraulic pulse generator has a liner, an anvil rotatably mounted in the liner and having a longitudinal slit, and two blades loosely mounted in the longitudinal slit. The liner has an elliptic hole. The two blades have their outer edges beveled in different directions. The anvil has a pair of axial ridges and the liner has on its inner periphery a total of five axial ridges. The blades, anvil and liner cooperate with one another to form pressure chambers while the liner is rotated.

Abstract: A lug nut wrench has a half inch driver for receiving a lug nut socket. The driver is connected to one end of a five inch length of half-inch pipe. The other end of the pipe is welded to a one by two by three-eighths inch plate at a position near one end of the plate. One-half inch studs project from an opposite side of the plate. A solid leverage bar has a sharpened end for lifting off hub caps. Radially mounted on the bar, are holes, nuts or rings which fit over the studs. The 18 inch rod is used to increase leverage. Leverage and torque are varied by extending the bar from either the short or long end of the plate.

Abstract: A communication passageway is formed to extend from the end surface of a cover member opposed to the axial end surface of the shoulder portion of a main shaft and through the main shaft so that in only one of the two particular phase conditions obtained per revolution of an oil cylinder, it establishes the communication between high and low pressure chambers to thereby equalize their pressures.The communication passageway establishes the communication between high and low pressure chambers in only one of the two particular phase conditions obtained per revolution of the oil cylinder and makes it possible to produce percussion torque in the other particular phase condition.

Abstract: A pneumatic tool for turning screws and nuts has a tool body including a driving member mounted rotatably thereon and capable of being pneumatically rotated. A ratchet wrench unit includes a crank and a swing arm. The crank has a crankshaft journaled in the ratchet wrench unit, and a crankpin. The swing arm is mounted rotatably in the ratchet wrench unit and is connected slidably to the crankpin so that the swing arm can be swung by the crankpin. The ratchet wrench unit is connected removably to the tool body in such a manner that the crankshaft can be rotated by the driving member. Instead of the ratchet wrench unit, a screwdriver may be mounted removably on the tool body in such a manner that the screwdriver can be rotated by the driving member.

Abstract: Disclosed is a rotary impact tool comprising a case enclosing a drive motor, a hammer member with an inner working surface provided with projections, an intermediate member transmitting rotation from the motor to the hammer member and including a guide made eccentric relative to the axis of rotation and intended to transmit rotation from the drive motor to the hammer member as well as to provide translation of the hammer member in a plane perpendicular to the axis of rotation, a spindle disposed coaxially with the intermediate member, embraced by the inner working surface of the hammer member, and having on its outer surface projections corresponding to the projections made on the inner working surface of the hammer member to transmit impulse rotation to the spindle.