Abstract: The present invention concerns a fastener (110) for the temporary assembly of at least two previously drilled structures (112) comprising: a hollow body (122) comprising a bearing surface (40); elastic clips (24) which are movable relative to the body and which form a projection relative to the bearing surface; a spacer (26) around which the elastic clips are positioned; a connecting element (130), extending within the body and secured to the elastic clips (24); and an actuating element (132) linked to connecting element by a thread/tapping (67, 84). The connecting element is traversed by a lateral opening (70) axially extended between two closed ends (72, 74); and the fastener also comprises a transverse stop (28) secured to the spacer, the said stop being capable of sliding between the axial ends of the said lateral opening.

Abstract: A setting tool includes: a body with at least a drive shaft connected to a pull rod designed to be screwed onto the crimp part, to drive the pull rod in rotation along an axis; a draw sleeve fixed to the body and connected to the pull rod, to translate the pull rod along the axis; and a placing nose, to house the pull rod rear end, the drive shaft front end, and the draw sleeve. The draw sleeve front end includes a cavity opening onto a first through hole on the side wall, and a second hole on the drive shaft axis of rotation, the through holes allow the pull rod front end to pass through the holes, to allow the pull rod rear end to pass through the first through hole, and to enable the pull rod to be placed along the drive shaft axis of rotation.

Abstract: A linear actuator assembly comprises a housing, an output shaft, a nose piece and a negative pressure device. The output shaft defines an actuator assembly axis, and is movable along the actuator assembly axis between an extended position and a retracted position relative to the housing. The nose piece is slidably mounted to the output shaft and movable between an extended position and a retracted position relative to the output shaft. The nose piece and the output shaft co-operatively define a chamber for containing a quantity of fluid, the volume of the chamber being smaller when the nose piece is in the retracted position than when the nose piece is in the extended position. The negative pressure device is connectable to the chamber, and is selectively operable so as to reduce the pressure in the sealed volume, thereby urging the nose piece from the extended position towards the retracted position.

Abstract: A pneumatic tool includes: a main body; an air passage disposed in the main body for air to flow in; an air exhaustion passage disposed in the main body, one end of the air exhaustion passage communicating with the air passage, the other end of the air exhaustion passage being an air exhaustion end; a flow way disposed in the main body, a rear end of the flow way communicating with the air passage, a front end of the flow way being positioned at one end of the main body; and a control mechanism disposed in the main body and connected with the air exhaustion passage. The pneumatic tool provides both blowing and sucking effects. An operator need not replace the tool. Instead, the operator can use the pneumatic tool to blow dust or take an article.

Abstract: A rivet setting device contains in a housing a receiving chamber in which a break-off rivet mandrel is situated after the setting operation. Arranged in this receiving chamber are two elongate magnets which leave free between them a space for the residual mandrel and which attract the residual mandrel from the holder for the rivet after it has been broken off and retain it. The holder for the residual mandrel can be moved with a transverse component in the device, with the residual mandrel being moved past a stripping element into a region outside the axis of the holder for the rivet. During the rearward movement of the residual mandrel holder, the residual mandrel is stripped off and remains in a collecting chamber.

Abstract: A rivet gun has a barrel, a handle, an annular flange, a pneumatic cylinder and a piston assembly. The handle protrudes downward from the barrel. The annular flange protrudes radially from the bottom end of the handle and has a bottom surface and a rotational angle alignment slot defined eccentrically in the bottom surface. The pneumatic cylinder is mounted under the handle and the annular flange and has a body and a top cover mounted on a top opening of the body and having a rotational angle alignment element mounted eccentrically on a top of the top cover and detachably engaging the rotational angle alignment slot of the annular flange. The piston assembly is mounted in the pneumatic cylinder. The rotational angle alignment slot and the rotational angle alignment element are both at least partially exposed to be visually observed from an appearance of the fully assembled rivet gun.

Abstract: A rivet gun has a barrel, a handle assembly, a cylinder and a seal ring assembly. The handle assembly is mounted under the barrel and has a hydraulic shaft and a handle mounted around the hydraulic shaft and having an annular shoulder. The cylinder has a top cover, an annular body and a bottom seat. The top cover is mounted under the handle and contacts the annular shoulder. A diameter of the top cover is larger than a diameter of the annular shoulder such that an outer periphery of the top cover protrudes radially out from an outer periphery of the annular shoulder instead of being covered by the annular shoulder. The annular body is mounted detachably on the top cover. The bottom seat is mounted detachably on the annular body. The rivet gun is allowed to change cylinders of different sizes or types.

Abstract: A rivet setter has a holder for holding a blind rivet prior to said rivet being set by means of the setter. The holder has a central cylindrical passage, the diameter of which is somewhat greater than the diameter of the mandrel. At least two, preferably three clamping jaws, which are guided in radial slots so as to be radially and axially displaceable, act on the mandrel. The width of the slot is smaller than the diameter of the mandrel.

Abstract: An approach is provided for modular pneumatic fastening device for operating a fastening component. The device comprises a main body, a motive module, a first fast-detaching module and a second fast-detaching module. The motive module being mounted on a top of the main body and comprises a first protrusion and a second protrusion. The first fast-detaching module is attached to the rear end of the motive module, and has a first recess connected to the first protrusion. The second fast-detaching module is attached to the front end of the motive module, is configured for operating the fastening component with the corresponding first fast-detaching module, and has a second recess connected to the second protrusion. Therefore, the first fast-detaching module and the second fast-detaching module can be replaced together pair-wise by the recesses attaching or detaching the protrusion, which fit for the fastening component to be operated.

Abstract: Setting device with a variable setting stroke adjustment and method of setting the setting stroke of setting device. Setting device includes a housing, a pulling rod structured and arranged for movement in an axial direction, an adjustably positionable stop element structured and arranged to adjustably limit a setting stroke of the pulling rod, and a locking element movable between a closed position and an adjustment position. The stop element has at least one region with a polygonal contour, and, in the closed position, the locking element engages in a path of motion of edges of the polygonal contour and, in the adjustment position, releases the path of motion.

Abstract: A snap ring attachment includes a guide cylinder (40) defining a guide path (41) having a region of a supply port side of a snap ring exhibiting a circular section and a region of an exit side of the snap ring exhibiting an oval section and continuously varying from the circular section to the oval section, so as to guide the snap ring toward an attachment groove, a posture changing and pressing mechanism (50) provided in the guide cylinder for pressing the snap ring supplied in an upright state vertical to the extending direction of the guide path while being radially contracted, to tiltingly move it, then again erect it, and press it while changing its posture to be pushed into the attachment groove, and a driving mechanism (60) for exerting driving force to generate pressing force in the posture changing and pressing mechanism.

Abstract: An approach is provided for modular pneumatic fastening device for operating a fastening component. The device comprises a main body, a motive module, a first fast-detaching module and a second fast-detaching module. The motive module being mounted on a top of the main body and comprises a first protrusion and a second protrusion. The first fast-detaching module is attached to the rear end of the motive module, and has a first recess connected to the first protrusion. The second fast-detaching module is attached to the front end of the motive module, is configured for operating the fastening component with the corresponding first fast-detaching module, and has a second recess connected to the second protrusion. Therefore, the first fast-detaching module and the second fast-detaching module can be replaced together pair-wise by the recesses attaching or detaching the protrusion, which fit for the fastening component to be operated.

Abstract: A blind-rivet gun includes a gun header, a cylinder, a piston, and a tube. The cylinder is separated from the gun header. The piston includes a piston header. The piston header and an inner surface of the cylinder form a seal to divide the cylinder into a first air chamber and a second air chamber. The cylinder includes a first gas hole and a second gas hole. The first gas hole is connected to the first air chamber, and the second gas hole is connected to the second air chamber. The piston is adapted to slide in the cylinder to generate inner high pressure gas by alternatively supplying outer high pressure gas to the first gas hole or the second gas hole. The tube is connected to the gun header and the cylinder. The tube transmits inner high pressure from the cylinder to the gun header.

Abstract: A rivet gun has a barrel, a shaft, a handle and a pneumatic cylinder assembly. The shaft is mounted under the barrel. The handle is mounted around the shaft. The pneumatic cylinder assembly is mounted under the handle and has a top cover, a fastener, an annular cylinder and a bottom base. The top cover, fastener, annular cylinder and bottom base are detachably assembled so can be replaced easily without changing the whole pneumatic cylinder assembly. The maintenance costs of the rivet gun are reduced.

Abstract: A blind-rivet gun includes a gun header, a cylinder, a piston, and a tube. The cylinder is separated from the gun header. The piston includes a piston header. The piston header and an inner surface of the cylinder form a seal to divide the cylinder into a first air chamber and a second air chamber. The cylinder includes a first gas hole and a second gas hole. The first gas hole is connected to the first air chamber, and the second gas hole is connected to the second air chamber. The piston is adapted to slide in the cylinder to generate inner high pressure gas by alternatively supplying outer high pressure gas to the first gas hole or the second gas hole. The tube is connected to the gun header and the cylinder. The tube transmits inner high pressure from the cylinder to the gun header.

Abstract: A rivet gun has a barrel, a shaft, a handle and a pneumatic cylinder assembly. The shaft is mounted under the barrel. The handle is mounted around the shaft. The pneumatic cylinder assembly is mounted under the handle and has a top cover, a fastener, an annular cylinder and a bottom base. The top cover, fastener, annular cylinder and bottom base are detachably assembled so can be replaced easily without changing the whole pneumatic cylinder assembly. The maintenance costs of the rivet gun are reduced.

Abstract: A fastener installation tool for installing breakstem fasteners, wherein a part of the fastener is broken off during installation and ejected into a collector bottle, provided with a safety disabling means, comprising a valve located in series with and between the tool trigger and main operating valve, wherein removal of the collector bottle causes the valve to close to prevent operation of the main operating valve, thereby to prevent use of the tool with the connector bottle disconnected.

Abstract: A riveting unit is assembled with an electric rivet gun, including a transmission unit, a clamping jaw having a locating portion driven by the transmission unit to be moveable between a first position and a second position, a first sensor detecting whether the locating portion of the clamping jaw is located at the first position, and a second sensor detecting whether the locating portion of the clamping jaw is located at the second position. When the locating portion of the clamping jaw is located at the first position, a blind rivet can be installed in the clamping jaw, and when the locating portion of the clamping jaw is located at the second position, the blind rivet can be ejected, and meanwhile the second sensor can allow the transmission unit to stop the movement of the clamping jaw, thereby preventing the clamping jaw from moving backwards excessively.

Abstract: A container (12) for use with a tool (2) for installing fasteners of the type in which a part of the fastener is broken off during installation, the tool (2) having a body, the container (12) being for collecting broken-off fastener parts during operation of the tool, the container (12) comprising: attachment means (20, 21) for removably attaching the container (12) to the body (8) of the tool, the attachment means (20, 21) being resiliently biased into attachment with the body (8) by resilient biasing means; and one or more contact region (22, 23) for receiving manual pressure from a user, at least one of the said one or more contact regions (22, 23) being coupled to the attachment means (20, 21); wherein the resilient biasing means are such that the attachment means (20, 21) can be detached from the body of the tool by the user applying manual pressure on the said one or more contact regions (22, 23) thereby detaching the container (12) from the body of the tool (2).

Abstract: A trigger device is mounted on a rivet gun. The rivet gun has a barrel, a handle and a pneumatic cylinder. The trigger device has an inlet channel defined in the handle, an outlet hole defined through the handle and communicating with the barrel, a valve-driving channel defined in the handle and communicating with the pneumatic cylinder, a space defined in the handle and communicating with the inlet channel, outlet channel and valve-driving channel. A trigger member is mounted on the handle. A two-step pressing assembly is mounted in the space and may be activated to control the rivet gun to eject a core pin of a used rivet or rivet pieces with an unused rivet. High-pressure air from an air source connected to the rivet gun is output only during the ejection operation of the rivet gun to prevent unnecessary air consumption and noise.

Abstract: Setting device with a variable setting stroke adjustment and method of setting the setting stroke of setting device. Setting device includes a housing, a pulling rod structured and arranged for movement in an axial direction, an adjustably positionable stop element structured and arranged to adjustably limit a setting stroke of the pulling rod, and a locking element movable between a closed position and an adjustment position. The stop element has at least one region with a polygonal contour, and, in the closed position, the locking element engages in a path of motion of edges of the polygonal contour and, in the adjustment position, releases the path of motion.

Abstract: The blind fastener installation tool also comprises an optional fastener delivery assembly, said optional fastener delivery assembly constituting: (1) a clip-fed fastener delivery system; or (2) a blowline-fed fastener delivery system.

Abstract: A breakstem rivet placing tool conventionally includes a flow restrictions for hydraulic fluid used to drive the tool in a stem pulling direction. This serves to prevent recoil of the tool due to rapid acceleration of an internal piston when the stem of the breakstem rivet breaks. Prior art flow restrictions create a jet of high velocity hydraulic fluid into the tool which may damage components by erosion. A revised fluid damper valve deflects and/or diffuses the fluid flow to avoid damage by erosion.

Abstract: A method and device are provided for verification of the quality of placing of blind rivets. The verification method involves successively carrying out, during the application of traction force to a stem, initial measurements in an initial state of the application of the traction force to obtain an initial traction force and an initial displacement of the rivet stem relative to the rivet body, intermediate measurements in an intermediate stage of the application of the traction force to obtain an intermediate traction force and an intermediate displacement, and terminal measurements in a terminal stage of the application of the traction force to obtain a terminal traction force and a terminal displacement. The obtained values are compared to acceptable values in an assignment table.

Abstract: In a fastener tool, a constant flow of compressed air is supplied. When the tool is not in use however the constant flow of compressed air results in waste. The tool is therefore provided with a trigger that is adapted when in a first position to stop the flow of compressed air through the tool in order to disable the tool and when in a second position to actuate installation means.

Abstract: A fastener placing tool (11) for placing fasteners of the breakstem blind rivet type incorporates a force/stroke monitoring device (22) which comprises an assembly body (24) detachably mounted on the tool between the latter and the anvil (18), a load-cell sensor (33) carried by the assembly body (24) for sensing the force applied by the hydraulic piston (16) to the jaw assembly 17 with respect to the anvil (18), and a non-contact stroke-sensor (35) carried by the assembly body (24) for sensing the position of the jaw assembly (17) relative to the anvil (18). The stroke-sensor (35) operates without physical contact with the jaw assembly (17) or any part of the tool moving therewith. To this end the jaw assembly (17) is connected to the hydraulic piston (16) by means of an adaptor tube (23) which has a conical tapering outer surface.

Abstract: In a fastener tool, a constant flow of compressed air is supplied. When the tool is not in use however the constant flow of compressed air results in wastage. The tool is therefore provided with a trigger (10) that is adapted when in a first position to stop the flow of compressed air through the tool in order to disable the tool and when in a second position to actuate installation means.

Abstract: A nose assembly for fitting onto a fastener installation tool for installing fasteners of the type in which a part of the fastener is broken off during the installation process, the nose being provided with a housing and a sleeve, the sleeve having a spring, and a collar which is movable within the housing against resistance of the spring, wherein plunger means are provided on the collar, and wherein the sleeve is threadably engaged with the collar, such that movement of the sleeve causes corresponding movement of the collar and plunger means, the plunger means being arranged to actuate a trigger thereby to open an air valve and allow a flow of compressed air through the tool, thereby to allow installation of the fastener into a workpiece.

Abstract: A pulling head having jaws that have a conical angle of at least forty-five degrees, and preferably sixty degrees, relative to a longitudinal axis about which the jaws are arranged. Another pulling head includes an elastic collet that has a plurality of fingers. Each of the fingers includes an internal jaw area, and a back end of the elastic collet preferably contacts a bushing. Preferably, the bushing provides high and reliable push force and also acts as a shock absorber during operation. The fingers of the elastic collet are configured to open and close during tool operation, and are configured to grip a break stem of a fastener such that there is no side loading. The elastic collet is also configured such that the fingers stay accurately centered and positioned, eliminating any possibility of jaw damage caused by the jaws tumbling, being off-center, or being otherwise positioned incorrectly.

Abstract: A rivet monitoring system is provided which has a micro-strain or micro fluid pressure sensor that measures strains or pressures within a tool component. These measured signals are compared to a number of tolerance bands formed about median strain or pressure versus time curve. Various techniques are provided to analyze the measured data with respect to the tolerance bands to determine if a particular rivet set is acceptable.

Abstract: A feeding unit for feeding an element to a treatment unit of a machine tool, in particular for feeding a rivet to a riveting unit, has a gripping element provided for the fastening element for the automatic take-up of the fastening element from a supply unit and automatic feed to the treatment unit. The gripping element is disposed on a rotary element rotatable about an axial direction, and at least one electromagnet is provided which is configured in such a way that a torque acting on the rotary element is generated by a magnetic force.

Abstract: A rivet set quality monitoring system is disclosed. A supply pressure sensor monitors the supply pressure to the tool. The tool has a second sensor which monitors strains or loads associated with a rivet set event. A processor evaluates outputs from the pressure sensor to apply a scaling factor to the output of the second sensor which is a function of the output of the pressure sensor. This modified data is analyzed to determine if the rivet set is acceptable.

Abstract: A rivet setting tool is provided to provide improved monitoring of riveted connections during rivet setting. The rivet setting tool includes a head piece for holding a rivet, a device for gripping a rivet pin, a pulling apparatus connected to the device for gripping a rivet pin, and a device for measuring the tension of the pulling apparatus. Using the setting implement according to the invention, a cause of a fault can be determined by means of a comparison between measured values and stored values.

Abstract: A rivet monitoring system is provided which has a micro-strain or micro fluid pressure sensor that measures strains or pressures within a tool component. These measured signals are compared to a number of tolerance bands formed about median strain or pressure versus time curve. Various techniques are provided to analyze the measured data with respect to the tolerance bands to determine if a particular rivet set is acceptable.

Abstract: A motor assembly for use in a inline device is disclosed. The motor assembly has a motor for operating the inline device. A hollow drive shaft passes through the motor to provide a conduit which an expendable portion of some fixturing hardware used with the inline device passes through to eject from or collect within the inline device. In another embodiment, the motor assembly is adapted for use in a tool for setting self-tapping rivets. The motor assembly has a motor having a hollow drive shaft adapted to pass through the motor and impart movement to a mandrel of the self-tapping rivet. A conduit within the hollow drive shaft is inline with the motor and is adapted to transfer the mandrel from one end of the tool, through the motor and into a repository upon detachment of the shank from the self-tapping rivet.

Abstract: Apparatus is provided for monitoring the installation of a blind rivet to attach together top and bottom members. The blind rivet installation tool includes a housing having an anvil seated on the rivet head. A collet is reciprocable within the tool housing and carries jaws for gripping the mandrel of the blind rivet. Retraction of the jaws by the collet displaces the jaws and the mandrel axially and causes the mandrel head to axially collapse and radially expand the hollow shank of the blind rivet into engagement with the bottom member so that the rivet attaches the top member and the bottom member. A first transducer measures the axial load imposed on the mandrel. A second transducer measures the axial displacement of the collet and the jaws and the mandrel.

Abstract: A blind rivet setting tool has a construction in which a tubular spring-biased handle gripped by an operator moves axially of the tool. An interlock between a trigger lever and the handle prevents operation of the tool until a rivet held by the tool is properly positioned in a hole of a workpiece.

Abstract: A pulling head includes a sleeve which threadably engages a sleeve adapter. A collet is threadably engaged with a drawbar adapter, and the collet and drawbar adapter are disposed and slidable in the sleeve. A set of jaws is disposed in the collet, and a jaw follower is disposed in the collet and contacts the jaws. A spring retainer is disposed in the collet, and engages two springs. Specifically, a first spring is disposed between the drawbar adapter and the spring retainer, and a second spring is disposed between the spring retainer and the jaw follower. The first spring has a higher rating than does the second spring. While the first spring is configured to accommodate inertia loading, the second spring is configured to urge the jaws closed yet be relatively easily overcome by the insertion of mandrels of different diameters.

Abstract: A rivet set quality monitoring system is disclosed. A supply pressure sensor monitors the supply pressure to the tool. The tool has a second sensor which monitors strains or loads associated with a rivet set event. A processor evaluates outputs from the pressure sensor to apply a scaling factor to the output of the second sensor which is a function of the output of the pressure sensor. This modified data is analyzed to determine if the rivet set is acceptable.

Abstract: A driving anvil washer retaining apparatus (12) for a rivet gun (14) includes a magnetized element (21). The magnetized element (21) is coupled to the rivet gun (14) and retains an anvil washer (52) during installation of a rivet (82). A method of installing a rivet (82) includes inserting a stem (46) of a rivet assembly (80) into a rivet gun nose (22) having at least one magnetized portion (21). A rivet (82) of the rivet assembly (80) is inserted into at least one object. The stem (46) is removed from the rivet assembly (80). A driving anvil washer (52) is retained via the magnetized portion (21).

Abstract: Disclosed is a continuous riveter capable of firing blind rivets in succession to caulk sheet metal or the like. A seal member 71 located on the oil chamber 6 side and a seal member 72 located on the air chamber 4 side are provided in an oil cylinder 1 where an oil piston 2 separates the oil chamber 6 of the oil cylinder 1 from the air chamber 4 of an air cylinder 3, and a portion of the oil cylinder 1 which is between seal members 71 and 72 is provided with an air vent 19; and a seal member 74, 76 located on the oil chamber 16 side and a seal member 73, 77 located on the air chamber 14, 15 side are provided in a jaw case piston 20 and in a nose piston 28, the seal members 74, 76 and 73, 77 sealing an area between the oil chamber 16 and the air chamber 14, 15, and the pistons 20 and 28 between the seal members 74, 76 and 73, 77 are each provided with an air vent 75, 78.

Abstract: A manual hydraulic riveter includes a body, a lever pivoted to the body for moving a first piston in a fluid cylinder to force hydraulic fluid through a first fluid pipe to a hydraulic cylinder to further move a second piston and an actuating rod carrying a riveting unit. When released the lever, the second piston is returned by a spring to force hydraulic fluid out of the hydraulic cylinder through a third fluid pipe and a second fluid pipe to the fluid cylinder.

Abstract: Apparatus for installing a rivet nut or the like having an intentionally threaded shaft wherein the apparatus includes a hydraulically geared power tool having an inner hydraulic fluid containing a chamber and a screw adapted to engage the threaded shaft of the nut wherein the power tool rotates the screw when actuated. A fluid outlet is coupled to the chamber and is coupled to a gauge controlled power supply, the power supply being fluidly coupled to the power tool whereby the power supply includes torque predetermining device for determining when a predetermined torque is placed on the screw, this stopping rotation thereof and resuming rotation in an opposite direction to withdraw the screw from the nut.

Abstract: A rivet setting tool having a motor driven hydraulic pump is disclosed. The rivet setting tool incorporates a fastener setting verification system configured to monitor changes pump drive motor current to determine if a particular fastener set is acceptable.

Abstract: A blind rivet setting tool has a construction in which a tubular spring-biased handle gripped by an operator moves axially of the tool. An interlock between a trigger lever and the handle prevents operation of the tool until a rivet held by the tool is properly positioned in a hole of a workpiece.

Abstract: An automatic suction and repelling device for rivet gun, which comprises a body and a handle, and the intake passages thereof are in communication each other; the rear center of the body is furnished with a regulation ring and a used-nail cylinder; the regulation ring can be adjusted to move by means of screwing so as to adjust the volume of pressure air to enter the body, and to adjust the vacuum suction force in the used-nail pipe; during rivet-pulling work, the rivet gun can automatically suck in, and can suck a used nail into the used-nail cylinder upon the rivet-pulling work done.

Abstract: A rivet setting tool is provided with a mandrel collection system. The mandrel collection system uses a valve system to provide high and low vacuum states to draw rivet mandrels into a collection bottle. The low vacuum state provides an energy savings and reduced noise levels.

Abstract: A rivet-stroke adjusting device for a rivet-nut gun, in which the parts mounted between the cylindrical hole of the mounting base on front end of the body portion and the outer sleeve of the rivet-pulling assembly include an outer sleeve with a cylindrical hole and a threaded hole, a thread sleeve, a spring, an adjustment ring, a steel pin and a screw; the center cylindrical hole of the adjustment ring is mounted to a pull shaft of the hydraulic piston of the mounting base by means of pin hole; the outer threads of the adjustment ring are screwed together with threads on one end of the outer sleeve, being pushed and limited with a spring; when the outer sleeve is turned, the adjustment ring will be pushed to move so as to have the pull shaft of the hydraulic piston moved a stroke.

Abstract: A rivet setting tool having a remote intensifier and autofill/recharge system is provided. The rivet setting tool has a hydraulic pulling head which is coupled to an intensifier. The intensifier has a mechanism for providing hydraulic pressure to the hydraulic rivet head to set a rivet tool. The intensifier further has a mechanism for refilling/recharging the hydraulic system of the rivet setting head.

Abstract: A compact handheld tool for installing corner pieces in ductwork is disclosed. The tool has V-shaped jaws that surround a duct corner. A corner piece to be installed on a flange of the duct is placed against a first of the jaws, and a second jaw closes against the a first jaw, pressing the corner piece against the flange. A third jaw engages with an edge of the flange and presses the edge over the corner piece. The tool can install a corner piece in a single operation independent of the orientation of the duct or tool.