Abstract: An apparatus for fastening a washered bolt with a flat washer passed therethrough, to a fastening object. Air discharged from an air blow nozzle is blown into a space between a head of the bolt accommodated in a socket and the flat washer. Foreign matter will be prevented from adhering to the flat washer and the bolt head.

Abstract: A system having a nut runner with a socket and a socket rotation mechanism is disclosed. The system creates a vacuum in the socket using an air vacuum system to attach and retain a bolt in the socket. Further, a high-pressure air blowing system is operated to blow high-pressure air into the socket in order to remove the attached and retained bolt from the socket. The inside of the socket is cleaned simultaneously by the high-pressure air.

Abstract: A device for fastening two parts to each other includes fastening screws extending in aligned passages in the two parts and receiving nuts, and a removable element for preventing the screw heads from moving during tightening or loosening of the nuts on the screws, this removable element cooperating with one of the two parts for preventing rotation of the screw heads relative to this part.

Abstract: A tool for operating a subterranean utility valve having limited accessibility includes a hollow housing with a plurality of elongated members mounted for sliding movement within the housing. Each elongated member is movable in a direction away from the first open end of the housing for placement about a valve nut of such utility valve. A handle is connected to the housing for biasing elongated members for engagement with such valve nut and for generating a torque enabling rotation of such valve nut in order to control flow through such utility valve. A rigid member is connected to plurality of elongated members for retaining and remotely moving them within the hollow housing.

Abstract: A blind fastener for securing a plurality of workpieces is provided that has a sleeve, and a pin member. In an alternate embodiment, the blind fastener has a sleeve, a pin member and a nut. The sleeves have a head with a plurality of rearwardly sloping recesses disposed therein. The recesses are adapted to be engaged with a plurality of rearwardly sloping nibs disposed on one end of a nose secured to an installation tool. The pin members have a splined head adapted to be engaged with a splined driver secured to an installation tool. Use of the splined head on the pin member, the splined driver, rearwardly sloping recesses on the sleeve, and rearwardly sloping nibs on the nose eliminates camming out of the nibs from the recesses during installation of the blind fastener. A nose assembly for installation of the blind fastener is also provided.

Abstract: The installation tool for a mushrooming expandable anchor has a hollow cylindrical sleeve with an inside diameter, the top having slots for engaging the base of the mushrooming component and a means for engaging and turning a threaded component, which compresses the mushrooming component. The means for turning the threaded component can be a socket, which rotates inside of the sleeve and engages a hex head at the base of the threaded component or alternatively the means for turning the threaded component can be a threaded rod for threading into the base of the threaded component until it reaches the end of the threads in the base. Another means of turning the threaded component is a screwdriver engaging a slot in the treaded component. All of the means for turning the treaded component may be by a powered drill with a connective adapter.

Abstract: An improved fastener installation tool is provided of the type having a fixture pin for seated reception into a mating recess at the shank end of a threaded fastener, while a power-driven tool socket installs a threaded nut onto the fastener shank. The installation tool includes an improved spring-loaded clutch unit for normally supporting the fixture pin against rotation, but permitting fixture pin rotation in response to a torque load exceeding a predetermined limit thereby preventing fixture pin breakage. The clutch unit is adapted for quick and easy disengagement from the fixture pin, and pivotal displacement to an out-of-the-way position to permit quick and easy fixture pin removal and replacement.

Abstract: A tool for removal of a stabilizer link in vehicles includes a first socket adapted to rotationally receive a second socket attached to the shaped end of a threaded bolt. A socket drive rotates the second socket relative to the first socket as the first socket is placed over a nut on the threaded bolt. The first socket includes an attached handle which is gripped to prevent undesirable rotation of the first socket relative to the second socket.

Abstract: The present invention includes a driven socket for a female threaded fastener formed from hexagonal steel stock or trilobe, D shaped stock, or round stock with other gripping or holding means. The driven socket also includes six radial lobes located adjacent to one of the hexagon of equal length sides and equidistant from the center of the fastener for loosening and tightening the fastener. A method of the present invention includes the steps for removing or tightening a threaded fastener from a corresponding bolt comprising the steps of: positioning a socket over a washer-nut; positioning a key to align a locking ring having tabs into a slot in the fastener to hold the socket securely to the locking fastener; engaging a lobe on the fastener to place pressure on a leveraging portion of the socket; and wherein rotating the socket removes or tightens the fastener.

Abstract: Three congruent prongs (16A, 16B, 16C) mounted on a shaft tube (12), converges simultaneously when an operating sleeve (14) moves forward. This action, along with their notches and shape provides a firm grip for holding and starting nuts and bolts. These prongs, made out of 304 grade stailess steel bands, provide good spring-like flexibility and rigidity. The concave sides of the prongs mate with the outside surface of the shaft tube (12) every time the operating sleeve (14) is moved forward. These physical features provide consistent alignment of the prongs every time the tool is used. With rubber sealant (16D) coated on the inside surface of the prongs, the nut and bolt starter gives a firm grip to hold and start a wide variety of shapes and sizes of screws, nuts and bolts. Additional uses of this tool are done with the prop rod (20) supplementing the prongs.

Abstract: A holding device for fastening elements which is securable to screw-driving power tool and includes at least two clamping members (20) which abut a stem (74) of the fastening element in a release position of the clamping members and which are displaceable upon an application of a force thereto into their release position, with the clamping members (20) having at least one contact region which forms, at least in the support position of the clamping members (20), a front stop of the holding device (10) in a drive-in direction (22) of the power tool (2).

Abstract: Provides is a screwdriver-and-nut wrench-combined tuning tool for radio frequency filter which is capable of preventing a movement of a tuning screw occurred when locking it with a tuning nut by making their combined body, preventing a difficulty of tuning resulted due to a separate use of a screwdriver and a nut wrench when a space for access to a tuning unit is not sufficient, and minimizing an interruption of turns of the tuning screw and the tuning nut by locking or turning the screwdriver and the nut wrench independently. The screwdriver-and-nut wrench-combined tuning tool for radio frequency filter comprises a case, a nut wrench positioned to rotate inside the case for turning or holding a tuning nut, a screwdriver positioned to rotate inside the nut wrench for turning or holding a tuning screw, a nut wrench locking unit that is fitted to the nut wrench or the case for locking the nut wrench; and a screwdriver locking unitthat is fitted to the case for locking the screwdriver.

Abstract: A holding socket for a fastener having a nut arrangeable on a threaded element, and a washer located between the nut and an object, the holding socket has a body having two opposite ends with a first end connectable to a part of a power tool and a second end which is axially spaced from the first end and connectable with the washer so as to hold the washer against rotation, and a locking element located in an area of the second end of the body and displaceable transversely to the body between a position in which it is located axially between the second end of the body and the nut and therefore prevents a removal of the socket from a fastener and another position in which it is no longer located axially between the second end of the body and the nut, and therefore allows withdrawal of the socket from the fastener.

Abstract: A tool for installing threaded parts with lock nuts onto a machine is disclosed. The tool includes an outer tube and an inner mechanism that rotate together or independently using cogs. When the outer tube and inner mechanism rotate together, the threaded part is tightened onto a machine. When the outer tube and inner mechanism rotated independently, the lock nut is tightened onto the threaded part.

Abstract: A hydraulic threaded bolt tightening device (1) for tightening and loosening large bolted connections, comprising a cylinder supported on a machine part to be clamped by means of a threaded bolt and a nut (2), at least one piston which is guided thereon in a sealed manner, with a threaded bush screwed on to one end of the threaded bolt and which can be pressurized, a pressure medium supply (4) to the threaded bolt tightening device (1), an adjusting ring (6) arranged in the cylinder and connected to the nut (2) by a form fit, and a rotary drive (7) for the adjusting ring (6) with a drive connection (16) to the adjusting ring (6), a rotation angle sensor (8) on the rotary drive, a control device (9) for driving the pressure medium supply (4) to the threaded bolt tightening device (1) and the rotation of the rotary drive (7), an input device (1), and the rotation of the rotary drive (7), an input device (10) for entering the pitch of the threaded bolt, and a computer device (11) for converting the rotation angl

Abstract: An improved fastener removal apparatus is configured to remove a swaged fastener of the type having an elongated threaded pin and a collar, with the collar being swaged to the pin. The fastener removal apparatus includes a nose assembly that can be mounted to an actuator of the type having a base and a translatable piston. The nose assembly includes a threaded thimble and a cutting anvil that are translatable with respect to one another. The threaded thimble is threadably connectable with the pin. The cutting anvil includes a number blades that cuttingly engage the swaged collar when the thimble is connected with the pin and translated with respect to the cutting anvil.

Abstract: An apparatus (10) for tightening a hexagon head bolt (13) includes a vertically movable automatic robot arm (16), a screwing mechanism (18) having a rotational part (19), a shaft member (20) mounted to the rotational part, a socket portion (21) mounted to the shaft member for receiving therein a head (14) of the bolt, and a retention means (22) for retaining the head received in the socket portion or retaining the head released from the socket portion. When the arm moves vertically with the head received in the socket portion, the rotational part is rotated along with the shaft member and the socket portion to screw the bolt into a threaded aperture (12) of a crankcase (11) of an engine.

Abstract: A multiple nut tool apparatus and method includes a slide shaft. More than one socket receiver is connected to the slide shaft such that at least one of the socket receiver is movable. A socket adapter is connected to each of the socket receivers.

Abstract: A fastener installation tool is provided that is used to install a threaded nut onto a threaded fastener of the type having a non-circular recess in an end of the fastener that matingly engages with a male member that has a complementary shaped non-circular tip end to the non-circular recess. The fastener installation tool generally has a head, a gear, a socket, a key, a key holder and a spring. The key has a shank with a non-circular external surface that matingly engages with a non-circular aperture in the key holder. The mating engagement between the key and the key holder provides the key with resistance to rotation and permits the use of a lower gauge spring that facilitates replacement of the key from the fastener installation tool. The key, key holder and spring are also available as a kit for retrofitting a fastener installation tool.

Abstract: A blind fastener for securing a plurality of workpieces is provided that has a sleeve, and a pin member. In an alternate embodiment, the blind fastener has a sleeve, a pin member and a nut. The sleeves have a head with a plurality of rearwardly sloping recesses disposed therein. The recesses are adapted to be engaged with a plurality of rearwardly sloping nibs disposed on one end of a nose secured to an installation tool. The pin members have a splined head adapted to be engaged with a splined driver secured to an installation tool. Use of the splined head on the pin member, the splined driver, rearwardly sloping recesses on the sleeve, and rearwardly sloping nibs on the nose eliminates camming out of the nibs from the recesses during installation of the blind fastener. A nose assembly for installation of the blind fastener is also provided.

Abstract: A blind fastener for securing a plurality of workpieces is provided that has a sleeve, and a pin member. In an alternate embodiment, the blind fastener has a sleeve, a pin member and a nut. The sleeves have a head with a plurality of rearwardly sloping recesses disposed therein. The recesses are adapted to be engaged with a plurality of rearwardly sloping nibs disposed on one end of a nose secured to an installation tool. The pin members have a splined head adapted to be engaged with a splined driver secured to an installation tool. Use of the splined head on the pin member, the splined driver, rearwardly sloping recesses on the sleeve, and rearwardly sloping nibs on the nose eliminates camming out of the nibs from the recesses during installation of the blind fastener. A nose assembly for installation of the blind fastener is also provided.

Abstract: A holding device for fastening elements which is securable to screw-driving power tool and includes at least two clamping members (20) which abut a stem (74) of the fastening element in a release position of the clamping members and which are displaceable upon an application of a force thereto into their release position, with the clamping members (20) having at least one contact region which forms, at least in the support position of the clamping members (20), a front stop of the holding device (10) in a drive-in direction (22) of the power tool (2).

Abstract: An improved fastener installation tool is provided of the type having a fixture pin for seated reception into a mating recess at the shank end of a threaded fastener, while a power-driven socket installs a threaded nut onto the fastener shank. The installation tool incorporates a simplified spring-loaded clutch assembly including a dual function spring member for urging the fixture pin axially forwardly relative to the power-driven socket, whereby the fixture pin slidably retracts against the applied spring force as the nut is threaded onto the fastener shank. The spring member additionally urges a cam pin into normal engagement with a lobed cam wheel carried by the fixture pin for normally preventing fixture pin rotation, but wherein the cam pin retracts to accommodate limited fixture pin rotation in response to a torque overload condition thereby protecting the fixture pin against deformation or breakage.

Abstract: Valve operator having a weighted powering assembly that is substantially supported and balanced on a generally upright elongated key that drivingly engages a rotatable valve nut.

Abstract: The invention relates to a device for adjusting a relative position between two components, having a support part which is fastened to the one component and has a through-opening in a holder section. The device includes a setting screw which has an external thread that engages in the region of its one end in an internal thread firmly arranged on the other component. The setting screw has rotary actuating means on its other end, has a radially projecting, fixed collar between its ends, and passes through the through-opening on a side of the collar remote from the other component. The setting screw carries a lock nut on a side of the holder section remote from the other component, the collar and lock nut axially restraining the holder section between them for fixing a relative position between setting screw and support part.

Abstract: With a blade exchanging device, a cylindrical body is engaged with a nut that is fastened to a spindle, and at the same time the nut is held by fitting nails of a chuck member with grooves that are formed on the nut. Next, a torque wrench is inserted through the cylindrical body, and a polygonal head of the torque wrench is engaged with a polygonal hole formed in the head of the spindle. In this state, the spindle is rotated with the torque wrench in a direction to unfasten the nut from the spindle. The nut is thereby detached from the spindle. When the cylindrical body is disengaged from the spindle, the nut is prevented from falling off the cylindrical body, since the nails of the chuck hold the nut.

Abstract: A tensioning device with a tensioning lever (1) and a detachable tensioning nut (2) has a pivotal tensioning cam (6), mounted elastically in the tensioning lever (1). The tensioning lever (1) has a seat (3) with a noncircular inside surface (4) for receiving the tensioning nut (2), which is mounted axially displaceably therein. The tensioning nut has an outside surface shaped to correspond to the noncircular surface of the seat (3). The tensioning nut (2) can be fixed removably in the tensioning lever (1) by a recess, which is disposed in the tensioning nut and into which the tensioning cam (6) can be engaged.

Abstract: A machine for clamping material to be fastened and automatically installing screws has been disclosed through a method of a self loading barrel that also aligns the screw to be installed thus relieving the operator of the strain of holding an unstable screw in place during the driving phase. This machine also automatically provides the force needed to keep the fastener from stripping at the head driver connection point through its unique design and also relieving the operator of much of the work related strain associated with these operations. This tool also provides another benefit in its design by automatically clamping the material during the fastening operation, that would normally have to be done separately with another tool. Another embodiment permits single loading of fasteners into the barrel.

Abstract: A washer which has a body having a first bearing face surface at one axial side and adapted to cooperate with a nut, a second bearing face surface at an opposite axial side and adapted to cooperate with an object, at least one third turning resistant surface adapted to cooperate with a thread of the bolt, and at least one breaking point arranged so that when the nut is turned and turns the bolt the washer stops the bolt from turning and thereby the nut creates a pull on the bolt which elongates the bolt in an axial direction and applies to the washer an axial force which breaks said body of the washer and allows a portion of said body of the washer to be pulled axially when the bolt elongates; and also a fastener, a method of fastening objects, and a tool for fastening objects can be provided with the new washer.

Abstract: An apparatus for an expandable screw including an outer screw, a inner screw, and an end nut. An assembly and method for driving and expanding an expandable screw apparatus into a surface or structure. The assembly and method dynamically expand the expandable screw by driving and expanding the expandable screw simultaneously.

Abstract: A self-supporting retaining device for retaining the head or nut of a threaded fastener assembly. A first portion of the device has a retaining component, such as a socket, for engaging the head or nut. A second portion of the device is adapted to engage a structure or feature that neighbors the location of the fastener assembly. Once the retaining component is mated to the head or nut of the fastener assembly, the second portion of the device is releasably engaged with the neighboring structure. The engagement of the second portion with the neighboring structure permits the position of the device to be independently maintained. The retaining component retains the associated head or nut, thereby allowing a user of the device to tighten or loosen the fastener assembly by manipulating only the head or nut located at the opposite end thereof. The device may then be disengaged from the fastener assembly and neighboring structure.

Abstract: A tool for adjusting extremely tight lug nuts, such as often found on tractor-trailer trucks, consists of a socket wrench pulled by a screw and anchored against another lug nut coaxial to the one being adjusted. A hand crank turns the screw, which in turn pulls the handle of the socket wrench toward the anchor yielding very high torque multiplication. The tool is elongated and shaped to permit its use in the tight space found in the annular recess surrounding the hubs of most truck wheels.

Abstract: A device for operating on each nut of a double-nut assembly, wherein an inner nut of the assembly is of a diameter larger than that of an outer nut of the assembly. The device comprises two components: the first component is provided to act on the inner nut and is designed to allow a portion of the second component to pass therethrough, while the second component is provided to act on the outer nut. The first component may be used to rotate the inner nut to a desired position while a portion of the second component resides therein, whereafter the second component may be used to secure the rotated position by tightening the outer nut. The device may be used with an eccentric fastener assembly employing such a double-nut arrangement to set the toe angle of a vehicle wheel.

Abstract: Fastener gripping apparatus (10) can be used in connection with a shaft (14) having a driver portion (80) adapted to engage a bolt (3). The apparatus is used to move the bolt between an uninstalled condition, and an installed condition in a structural member (8). The apparatus can include a chassis (12) having a first end (22), a second end (24), and a passage (32) extending therebetween. The shaft can be positioned in the passage with the driver portion extending from the second end. A retainer (16) can be connected to the chassis, having a retaining end (54) adjacent the second end and moveable between a closed position and an open position. A contact surface (64) can be on said retaining end and positioned to hold the fastener in engagement with the driver portion when the retainer is in the closed position.

Abstract: A fastening system includes a bolt member, a nut to be turned, and a torque power tool operative for applying a torque to the bolt member and a torque to the nut to be turned simultaneously, so that during turning of the nut, the bolt member does not turn or twist due to torsion or side load, the bolt member including a rod and a washer having an axis, the rod having at least two portions located substantially at its ends, one of the portions being a threaded portion and located at one of the ends of said rod to connect with the nut to be turned while another of the portion located at the other of the ends of the rod is adapted to connect with an object, the washer having two opposite bearing faces extending substantially perpendicular to the axis and being subjected to turning friction, the bearing faces including an upper bearing face adapted to cooperate with a bearing face of the nut to be turned and a lower bearing face adapted to cooperate with a bearing face of one of the at least two parts, the torque

Abstract: A nut driver is provided in which a torque is delivered to a fastener while a bolt is rotationally maintained in a fixed position thereby tightening the fastener onto the bolt. The nut driver also removably attaches to pulse gun and includes a planetary gear arrangement. The nut driver is interchangeable with a variety of pulse guns. Although, conventional devices provide a torque to rotationally couple a nut to a bolt, the feature of interchangeability which allows utilization of different pulse guns is not available. The ability to interchange pulse guns allows the nut driver to easily be used with a variety of drive devices or pulse guns. Furthermore, the nut driver converts the variety of pulse guns into useful driving tools for fastening nut and bolts or other fastener pairs together.

Abstract: A wedge-type fastener and tool for installing the same for preventing the separation of structural members during drilling or other operations. The fastener includes four spring biased pins which are adapted to be extended into aligned holes in the structural members providing four prongs of engagement increasing the bearing surface of the fastener without deformation of the structural members.

Abstract: A rock bolter has a drill and a bolt driver, both mounted to a turret that rotates relative to a base to align either the drill or the bolt driver with a work axis. A stinger/centralizer has two head elements, each advanced along a curvilinear path. When advanced, the head elements mate to provide a centralizer passage on the work axis. A supplementary stinger affixed to the base extends to engage the rock surface and provide stability as the head elements are retracted. The drill and the bolt driver are mounted on carriages activated by a common mechanism. A drill carriage disabling surface is affixed to the base to block the drill carriage when the drill is off the work axis, and a bolt driver carriage disabling surface is affixed to the base to block the bolt driver carriage when the bolt driver is off the work axis.

Abstract: A tool is disclosed having a holder provided with a mounting opening for mounting on a drive shaft, which may be driven in oscillating fashion, and having further a fixture for mounting a working element. The working element comprises at least two holding sections, spaced one from the other in tangential direction to the mounting opening, and wherein a mounting plate is provided which is engaged by releasable securing elements that coact with the holding sections for clamping the working element against the holder.

Abstract: A tool, for use in turning the screw on a hose clamp, in which a shaft is slidably and rotatably mounted on an elongate slender body member and resiliently biased toward an abutment on the body member to grasp there between the screw on the hose clamp. The shaft has a tool head end to drivingly engage the screw head and at the other end a handle or socket for use in turning the shaft. The abutment on the body has a recess to receive therein the free outer end of the hose clamp screw. This recess and the socket on the drive head end maintain the screw and drive in axial alignment during use. A lug on the body member projects toward and terminates proximate a leading end portion of the shaft turning handle. The lug and its proximity to the handle make it easy to manipulate the tool using one hand.

Abstract: A wrench including an elongated body with a pair of primary socket members attached to the opposed ends thereof. Each of the primary socket members has a driven socket for holding and turning a nut. A sliding sleeve is slidably and rotatably positioned on the body. A retaining arm extends outwardly from the sliding sleeve and carries an extensible backup assembly. The backup assembly has a support bracket releasably secured to the retaining arm and carrier bracket suspended from the support bracket by at least one spring. The carrier bracket has a threaded aperture with which a threaded rod is engaged. A secondary socket member is attached to the threaded rod and has a backup socket for holding a nut in axial alignment with one in the driven socket.

Abstract: A bolt retaining device for a nutrunner which includes a socket having a longitudinal axis and being sized to fit the bolt, the device having an electromagnet positioned with respect to the socket to generate a magnetic field directed along the axis of the socket to hold the bolt in the socket when the field is present, and a controller connected to the electromagnet controlling the magnetic field. The bolt retaining device wherein the electromagnet is a coil co-axially mounted with respect to the socket. Each nutrunner can include a motor, a socket, and a shaft connecting the motor to the socket. One or more nutrunners can be provided on a movable frame.

Abstract: A coaxial socket tool that includes an outer socket having a hollow body with a first end, a second end, and an inner diameter, the first end of the outer socket being adapted for engaging the surface of a nut of a size, the second end of the outer socket having a connector for transferring torque to the outer socket. An inner socket having a body is rotatably mounted within the inner diameter of the hollow body of the outer socket. The body of the inner socket has a first end and a second end. The first end of the inner socket is adapted for engaging a nut of the same size as engaged by the first end of the outer socket. The second end of the inner socket also having a connection that allows transfer of torque to the inner socket.

Abstract: A power tool for tightening and loosening a bolt connected with a nut and a washer arranged so that the nut banks with one of its sides onto one of washer faces, the power tool comprising a housing, drive means accommodated in the housing, and at least two coaxial connecting means including a first connecting means provided for engaging and turning the nut and subjected to a turning force in one direction, and a second connecting means subjected to a turning force in an opposite direction, the coaxial connecting means being formed so that one of the coaxial connecting means is being turned while the other of the two coaxial connecting means stand still depending on a turning friction encountered as a result of one being connected with the washer while the other one is connected with the nut, or the result of one being connected with the bolt and the other one is connected with the nut, or as a result of one being connected with a reaction arm adapted to abut against an adjacent stationary object while the oth

Abstract: An automatic transmission is adjusted by changing the longitudinal position of a pin relative to a hydraulically-actuated piston, the pin being threaded into the piston. A holding socket engages the piston and prevents it from rotating while the pin is being adjusted. The holding socket engages a support guide which is contained within the transmission casing. The combination of the holding socket and the support guide replaces a spanner wrench, used in the prior art, and eliminates the need to disassemble the transmission to perform the adjustment, and also provides a more convenient way of making the adjustment in the cramped environment of an automatic transmission. The process therefore substantially reduces the time required to adjust an automatic transmission, and also reduces the likelihood of harm to the transmission, or injury to the technician, during the adjustment process.

Abstract: A screwdriver with a nose having a touchdown foot to engage a workpiece and an arm member forward of the foot forming a slotway between the foot and the arm member adapted to receive edges of sheet material and hold the sheet material against movement away from a screw being driven.

Abstract: A reaction system for use in combination with a fluid-powered wrench tool in assembling or disassembling large size tube fittings of a variety including a fastener or nut which is threadably engagable with a port end of the fitting body. The system includes a reaction member attachable to the tool as extending along a central longitudinal axis disposed general parallel to the line of action of the cylinder assembly of the tool from a forward end face positionable in confrontation with the fastener to an opposite rearward end face. The system also includes an associated wrench member which is provided as having a rearward shank end mountable to the reaction member and a forward jaw end configured to receive the external surface of the fitting body in an engagement which delimits the rotation of the fitting body in a first direction about the axis of rotation of the fitting fastener.

Abstract: A bolt tightening device for tightening torque controlled bolts each having at one end thereof a tip to be sheared has an outer socket engageable with a nut, and an inner socket engageable with the tip, the inner socket being axially slidable relative to the outer socket and biased outward by a spring, the two sockets being coupled to planetary gear mechanisms for delivering opposed torques to the respective sockets, a knockout pin extending into the inner socket for forcibly removing the bolt tip as sheared. The knockout pin for knocking out the sheared bolt tip is made contractable by being composed of a shank and a head provided on the shank and biased outward of the shank by a spring, The length of backward stroke of the knockout pin required for knocking out the tip is minimized by contracting the pin to thereby shorten the length of the device.

Abstract: A device for tightening a bolt and a nut including a housing having a planetary gear reduction mechanism accommodated therein, a rotational drive source attached to the housing for inputting power to the reduction mechanism, an inner socket coupled to one of two output shafts of the reduction mechanism and engageable with a tip at an end of the bolt, an outer socket coupled to the other output shaft of the reduction mechanism and engageable with the nut, and a torque sensor for detecting a predetermined tightening torque of the outer socket. An actuated brake is disengageably coupled to a rotation transmitting system for the inner socket, whereby fasteners of the one side type can be tightened up efficiently with safety.

Abstract: A saw (10) comprises a housing, a drive spindle (20) rotatably mounted in the housing and a circular saw blade (not shown) adapted to be releasably mounted on one end of the spindle. The blade fits over the threaded end (25) of the spindle and a nut (26) clamps the blade to the spindle. The spindle is in the form of a sleeve and is rotatable about a shaft (22) fixed in the housing. The bore (30) through the end of the spindle is of hexagonal section and corresponds with a bore (32) formed in the end of the shaft.A wrench (40) is used to remove the blade and has a socket (48) to engage the nut and a freely rotatable pin (50) which also has a hexagonal section and which is adapted to fit in the bores (30,32) when the socket is on the nut and lock the spindle to the shaft.