Abstract: The present invention relates to apparatus and process for roll forming a fillet at the juncture of the shank and head of a pin type fastener. The process and apparatus can be preset to perform the fillet rolling at selected parameters and to monitor the parameters for providing parts with uniformly rolled fillets.

Abstract: A two piece blind fastener for securing a plurality of workpieces including a hollow sleeve having an enlarged sleeve head at one end and a pin having an enlarged shear ring at the end opposite the sleeve head followed by an elongated retention portion of reduced diameter. The shear ring is adapted to engage and move inside the sleeve to form a tuliped shaped blind head in response to a relative axial force applied between the pin and sleeve and to shear off proximate to the inner or blind sheet line of the workpieces. The retention portion is then moved with the pin shank into the shear ring and with the shear ring finally located at a position on the retention portion depending upon the overall thickness of the workpieces. This provides a clamp and lock section between the pin and sleeve at the inner or blind side of the workpieces. The pin and sleeve have a lock structure actuated after final formation of the clamp and lock section to provide a lock between the pin and sleeve.

Abstract: A manually applied installation tool, for setting fasteners by applying a relative axial pulling force thereto and including a first hydraulic piston in a first hydraulic cylinder for reciprocation in response to a preselected high hydraulic pressure for applying the relative axial pulling force, a second hydraulic piston in a second hydraulic cylinder for reciprocation between compressive and non-compressive directions for providing hydraulic fluid at the high hydraulic pressure to the first hydraulic cylinder for application of the axial pulling force by the first hydraulic piston, a fluid reservoir having a supply of hydraulic fluid for compression by the second hydraulic piston and flow to the first hydraulic cylinder through an access valve, a high pressure relief valve connected to the second hydraulic cylinder and actuable to relieve the fluid pressure at a preselected high magnitude with flow of hydraulic fluid back to the fluid reservoir.

Abstract: A fastener system for multi-piece swage type fasteners, including a pin and a collar, and providing a stump type fastener constructed to be set as a pull type fastener with the fastener pin having a threaded gripping portion and including a compact installation tool having a swage anvil and a rotary threaded member adapted to be threaded onto the threaded pull portion of the pin whereby a relative axial force is applied between the pin and the collar via the rotary threaded member and swage anvil to cause the anvil to radially overengage the collar to swage it into locking grooves on the pin and the pull portion remaining on the pin after installation and with the swage anvil being connected to a piston rod of a piston for axially reciprocating movement for swaging the collar with the rotary threaded member being axially fixed and with the swage anvil and rotary threaded member being offset from the remainder of the tool whereby the tool can be used to install such fasteners in applications of limited clearan

Abstract: A two piece fastener system for including a pin member and a collar having an optimized strength with the materials of the pin member and collar having a predetermined shear strength ratio; the collar has a preselected excess volume to provide a desired ‘overpacking’ condition and is of a size whereby after swage it will define a minimum wall thickness; the collar has an outer surface with a contour which in combination with a preselected excess volume results in a reduction in load required to swage the collar and with a pull type fastener providing a breakneck groove of reduced strength whereby severance of the pintail will occur at a reduced load resulting in a reduction in shock or ghost load applied to workpieces including those of a plastic or composite material.

Abstract: A blind bolt for securing a plurality of workpieces at a desired clamping force includes a pin having an elongated shank terminating at one end in an enlarged pin head and a generally elongated tubular sleeve adapted to receive said pin shank. The sleeve includes a first portion adapted to be located in aligned openings in the workpieces and a second portion being located on said pin shank between said pin head and said first sleeve portion. A nut is operatively connected with said pin and is adapted to be engaged by an installation tool whereby an axial force can be applied by the installation tool between said pin and the nut to clamp the workpieces together. The second sleeve portion is radially deformable at a location between said pin head and a blind side surface of the workpieces in response to the relative axial force of a magnitude less than the clamping force to form an enlarged blind head for engaging the blind side surface.

Abstract: A fastener includes a pin and a collar for engaging the pin. The pin includes a pin head for engaging one exposed surface of the workpieces and a pin shank for positioning through a bore in the workpieces. The pin shank includes a second working second working edge, a second locking groove, a first working edge, a first locking groove, a breakneck groove and a pin tail having a plurality of pulling grooves. The collar includes an enlarged head and a through bore. The collar is placed over the pin shank and an installation tool is used to grip the pulling grooves. The installation tool forces the presses the collar onto the pin. As this happens, the first working edge engages the through bore of the collar and moves material from the through bore into the first locking groove to create a lock between the collar and the pin.

Abstract: A fastening system including a two piece swage type fastener including a pin and a collar in which the pin has relatively wide lock grooves and in which the lock grooves have a generally smooth root contour with the collar having a shank portion with a wall thickness defining an excess volume of material prior to swage greater than the volume of the confronting lock grooves and with the clearance between the inside diameter of the collar shank portion and the diameter of crests of the lock grooves being a minimum to reduce the compressive force required to swage the collar shank into the lock grooves and with the excess volume of collar shank material providing only a partial fill of the lock grooves upon swage.

Abstract: A two piece blind fastener for securing a plurality of workpieces including a hollow sleeve having a straight shank with an enlarged sleeve head at one end and a pin having an enlarged pin head; the pin has a pin stop shoulder and a lock groove located near the pin stop shoulder; the pin head is adapted to engage the sleeve to form a bulb type blind head in response to a relative axial force applied between the pin and sleeve; the pin stop shoulder is adapted to engage a sleeve stop shoulder to direct the material of the sleeve stop shoulder substantially radially inwardly into the lock groove to lock the pin and sleeve together and to finally form a stop surface on the sleeve for stopping axial movement of the pin through the sleeve; in addition the pin has an expander portion adapted to expand the sleeve shank radially outwardly to fill the openings of the workpieces and with the expander portion having a grooved section with alternate relief grooves and expander segments with the relief grooves receiving e

Abstract: A gripping jaw assembly for a pull tool for setting pull type fasteners of a type which include a pin and collar and/or sleeve with the pin having a pull portion adapted to be gripped by a plurality of jaws in the jaw assembly with the jaws having a plurality of gripping teeth and with the jaws being movable in separate guide tracks and also supported in a manner whereby the jaws and their gripping teeth are maintained axially and radially in phase with each other and with the pull portion of the pin and with the jaw teeth of the separate jaws being maintained in phase with each other when gripping the pull portion of the pin.

Abstract: The present invention is to a lightweight threaded bolt type fastener having a shank with a large diameter portion and small diameter portion connected by a transition portion; a thread is roll formed on the small diameter portion and terminates in a run-out section where the thread gradually decreases in root depth and width and with the run-out section being of minimal axial length and being located closely adjacent the transition portion to produce a run-out zone of minimal axial length. A rolling die for forming the thread with minimal thread run-out having ridge segments with tapered end surfaces for providing the run-out thread with an end wall parallel to the transition portion and a method of making the bolt type fastener.

Abstract: A threaded fastener for securing workpieces with a determinable desired clamp load and including a nut assembly and a bolt with the nut assembly including a nut member with a lock base having a load ring portion and a boss portion with the boss portion adapted to be located in a retention counterbore in the nut member and being of a length to provide a gap between the load ring portion and nut and at a predetermined load to collapse and close the gap and be deformed radially into compressive engagement with the threads of the bolt to provide prevailing torque type lock structure resisting loosening of the nut assembly from the bolt with the predetermined collapse load providing the desired clamp load and with the gap closure visibly indicating attainment of the desired clamp load.

Abstract: A blind fastener with a pin having a pin shank which extends through a cylindrical main sleeve and expansion sleeve whereby it can be gripped and pulled by an installation tool with the pin having an enlarged pin head at the blind end of the pin shank. The expansion sleeve is located between the pin head and the inner end of the main sleeve and is adapted to move into the inner or blind end of the main sleeve to form a first tulip shaped blind head for clamping workpieces together in response to a relative axial force applied between the sleeves and pin by engagement of the pin head with the expansion sleeve. As the axial force is increased the pin head is moved into the expansion sleeve to form a second tulip head to further clamp the workpieces and to secure the pin, main sleeve and expansion sleeve together at that end and is moved closely adjacent the workpiece surface at the blind side to form a high strength blind head.

Abstract: A pin for a two piece type fastener includes a flexible member attached to a free end of the pin. The flexible member has a diameter slightly larger than a bore in a workpiece through which it is inserted so that the pin is retained in the bore after insertion. The flexible member also cleans debris from the bore as the pin is installed in the bore, thereby reducing the possibility of the debris from fouling the grooves in the pin.

Abstract: A control system for an assembly tool includes sensors which monitor the status of the tool at each step of operation and a controller receives signals from the sensors to ensure proper status in any given step. The tool includes a collar transfer device which receives a fastener collar from a remote collar sending unit and transfers the collar to a collar-swaging assembly which moves the collar to a cooperating fastener pin and swages the collar onto the pin. The sensors of the system monitor the position of the collar transfer device, the presence or absence of a collar in the collar transfer device, the position of the swaging assembly, the presence or absence of a collar in the swaging assembly, and the presence or absence of a fastener pin of proper length in a position to be engaged by the collar.

Abstract: A threaded fastener including a nut and a bolt with the nut including a ring section and a nut section with the nut section having a main body portion and a neck portion with the neck portion adapted to be moved into the ring section and to be moved radially inwardly such that the threads in the neck portion are moved into compressive engagement with the engaged threads of the bolt to provide prevailing torque structure resisting loosening of the nut member from the bolt.

Abstract: A blind fastener has an assembly including an inner sleeve, an outer sleeve and a pin member and is adapted to be located in workpiece openings with the pin member having an expansion portion adapted to be pulled through the inner sleeve radially expanding both the inner and outer sleeves to provide an interference fit with the workpiece openings.

Abstract: A clamping tool for removing the gap between and temporarily clamping workpieces together for subsequent fastening and having a cable actuated toggle member for engagement with one side of the workpieces and a nut member engageable with the opposite side of the workpieces.