Abstract: A fastening system including a swage type fastener including a pin and a collar adapted to be swaged into helical lock grooves in the pin and with the collar having a female thread which is threadably engageable with the helical lock grooves to selectively clamp or locate the workpieces relative to each other more or less prior to swage, with the collar thread being of a strength to deform or shear relative to the pin threads in response to a relative axial load between the pin and collar at the initiation of the swage operation but prior to swaging and in which the fastener includes a resistance member for permitting pre-clamping of the workpieces together at a selected pre-assembly pre-load while subsequently permitting sufficient relative axial movement between the pin and collar after pre-clamping such that the collar threads can be deformed or sheared prior to initiation of swage whereby the final clamp-up load of the workpieces is substantially uninhibited by the initial threaded engagement of the pin a

Abstract: An installation tool for pin and collar fastener assemblies includes an ejector rod slidably mounted in an axial blind bore in the actuator portion of the tool. Within the blind end of the axial bore is an elongated resilient bumper adapted to engage the ejector rod to absorb momentum and energy associated with high speed movement of a severed pintail. The resilient bumper minimizes shock loading of the ejector rod and thereby prolongs the ejector rod service life.

Abstract: A fastening system including a two piece swage top fastener including a pin and a collar in which the pin has shallow lock grooves having a ratio of (h/Du).times.10.sup.2 of four (4) or less and in which the lock grooves have a simulated streamlined root contour generally defined by a portion of an ellipse, with the collar having a wall thickness defining a volume of material sufficient to provide overpacking of the shallow grooves of around 16% and to provide a clamp load of between around 85% to around 95% of the yield point of the pin, and with the pin and collar materials having ultimate shear strengths in a ratio of around 1.8:1 to 2.4:1 and with the width of the shallow pin grooves and intervening shoulders being generally in accordance with the shear strength ratio between the pin and collar.

Abstract: A swage type fastener including a pin and a collar adapted to be swaged onto the pin by the application of a relative axial force by an installaiton tool, with the pin having a lockgroove portion, a tubular collar having an inner and outer end and adapted to be located on the pin and having a collar shank portion adapted to be swaged into the lock groove portion by the relative axial force applied between the pin and the outer end of the collar by the installation tool, the collar having a through bore which has a reduced diameter bore portion whereby the collar is generally piloted on the pin, and the collar shank portion being generally frusto conically shaped from the reduced diameter bore portion to an enlarged bore portion at the outer end, the collar shank portion having a generally uniform wall thickness from the outer end for a distance over its swageable length whereby the frusto conical shape of the collar shank portion provides a high hold-off to resist initiation of swage of the outer end of the c

Abstract: A tool for swaging a fastener collar around a grooved fastener pin to secure two or more work pieces together includes an axially elongated anvil and collet that can slide back and forth to perform the swaging operation. Localized side areas of the anvil and collet are cut away to define a clearance space that can fit around projecting portions of the work that might otherwise obstruct the tool against proper placement of the anvil against the fastener collar. The anvil and collet are rotatable as a unit to enable the clearance space to be oriented at any desired location around the anvil circumference.

Abstract: A nose assembly for pulling fasteners through a workpiece includes an anvil having a conical surface for engaging a complimentary conical surface defined by a set of chuck jaws. The chuck jaws includes a rear skirted portion defining a recess for receiving a biased support member which prevents the radial collapse of the chuck jaws during actuation of the nose assembly. The nose assembly is particularly adapted for gripping a relatively short axially projecting portion of a fastener while ensuring complete engagement of all jaw teeth with the fastener.

Abstract: A method for securing workpieces of composite type materials and including a fastener adapted to be located in aligned bores in such workpieces with a preselected interference fit, with the fastener comprising a pin having an elongated shank, an enlarged head and enlarged diameter smooth shank section adjacent the pin head, and further having a threaded section extending from the smooth shank section to a breakneck groove located in the shank to define a frangible portion at its free end, the breakneck groove adapted to fracture at a preselected axial load of generally low magnitude, a thin gauged expansion sleeve having an inside diameter less than the diameter of the smooth shank section, the sleeve having an outside diameter permitting the assembly of the sleeve into the workpiece bores with a snug fit, the breakneck groove having an axial strength at least equal to the maximum axial load required to pull the pin member fully into the sleeve with the smooth pin shank section expanding the sleeve into the w

Abstract: A push-pull tool for setting multi-piece fasteners includes a piston that is movable back and forth within a cylinder in response to fluid forces on opposite faces of the piston. One of the fluids is an air-oil foam mixture that acts essentially as an incompressible liquid force-transmitter, while being somewhat compressible so as to absorb shock loadings associated with rapid piston movements. A check valve is included in the system to admit atmospheric air into the air-oil foam mixture, to thereby partially compensate for oil leakage that might inadvertently take place across the piston seals.

Abstract: A blind fastener for fastening workpieces of a crushable or composite material and which provides a blind head having a large bearing area against the adjacent blind side of the workpieces and having a main sleeve with a tapered nose and an expandable sleeve with the expandable sleeve having a primary section and a secondary section with the secondary section having a wall of reduced cross-sectional area and of a lower hardness and/or material strength than the primary section such that after the secondary section has moved past and been expanded over the tapered nose the leading end of the primary section will substantially not move radially inwardly as it is moved over the tapered nose and at a preselected axial or column load the secondary section will substantially fold or collapse to form the blind head with a large bearing area while the primary section will substantially not buckle whereby the pin can provide a visual and/or measurable indication that the fastener has been installed in a proper grip co

Abstract: An adaptor coupling for providing a rotatable connection between an installation tool and an offset nose assembly for setting pin and collar type fasteners enables previously non-rotatable nose assemblies to be rotated around the end of the installation tool to enable the nose assembly to access and set difficult to reach fasteners while at the same time minimizing operator fatigue.

Abstract: A push-pull tool for setting multi-piece fasteners includes a piston that is movable back and forth within a cylinder in response to fluid forces on opposite faces of the piston. One of the fluids is an air-oil foam mixture that acts essentially as an incompressible liquid force-transmitter, while being somewhat compressible so as to absorb shock loadings associated with rapid piston movements. A check valve is included in the system to admit atmospheric air into the air-oil foam mixture, to thereby partially compensate for oil leakage that might inadvertantly take place across the piston seals.

Abstract: A fastening system including a two piece swage type fastener including a pin and a collar adapted to be swaged into lock grooves in the pin and in which the lock grooves are helical and with the collar having a limited female thread which is threadably engageable with the helical lock grooves for variably clamping work pieces to be secured prior to swage, with the collar thread being deformable in response to a relative axial load between the pin and collar at the initiation of the swage operation but prior to swaging and in which the lock grooves are shallow and have a ratio of (h/Du).times.10.sup.2 of four (4) or less and in which the lock grooves have a simulated streamlined root contour, with the collar having a wall thickness defining a volume of material sufficient to provide overpacking of the shallow grooves of around 16%, and with the pin and collar materials having ultimate shear strengths in a ratio of around 1.8:1 to 2.

Abstract: A two piece blind fastener for securing a plurality of workpieces including a hollow sleeve having an enlarged sleeve head at one end, a pin having an enlarged pin head, the pin having a pin stop shoulder and a lock groove located near the pin stop shoulder, the pin head adapted to engage the sleeve to form a blind head in response to a relative axial force applied between the pin and sleeve, the pin stop shoulder adapted to engage the stop shoulder with the material of the sleeve stop shoulder being directed 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.

Abstract: A manually-operated fastener installation tool is provided with a self-contained cartridge or magazine for feeding lockbolt collars to an installation position adjacent the tool nosepiece. A fixed, inflexible feed path directs the collars from the cartridge towards the nosepiece to eliminate the jamming which occurs with conventional flexible feed tubes. The entire collar feed path is pivotally mounted within the tool to avoid complex shuttling movements of the collars across transition regions and discontinuities in the feed path to further reduce jamming.

Abstract: A pull type fastener including a tubular sleeve and an elongated pin having a disposable pull portion at one end thereof with the sleeve having an enlarged pin head and a shank, a helically splined portion on the pin shank having ridges and grooves and adapted to engage a preselected portion of the sleeve shank bore to move the sleeve material into the spline grooves. The degree of interference between the splines and the sleeve shank, and the relative hardness ratio of the pin to the sleeve being designed such that the sleeve materiall will flow into the spline grooves without radially expanding the sleeve into interference with the bore of the workpieces being fastened.The result being that until the moment of clamp up the sleeve will rotate relative to the pin along the helical splines at a minimum pull force, then at clamp up a momentary and substantially increased torsional force resulting from the sleeve rotation being arrested assists in severing the pin from the pull portion thereof.

Abstract: A blind bolt for securing workpieces including a sleeve, pin and lock collar, and generally being of the non-sleeve-expanding type (i.e.

Abstract: An offset nose assembly for swaging a fastener collar about a fastener pin includes an anvil housing which is rotatably mounted within a tubular sleeve portion of a hydraulically actuated installation tool. A collet is slidably fitted within the anvil housing and is connected to a piston of the installation tool via a smooth-walled drawbar and tubular adapter coupling. The drawbar is received within smooth-walled bores formed within the collet and the tubular adapter coupling. The tubular adapter coupling is closely fitted within a tubular portion of the anvil housing and is adapted to be securely fixed to the reciprocating piston of an installation tool. The anvil housing is mounted to the installation tool with a split ring and fastening nut in a manner which ensures an axial clearance is maintained between the installation tool and the anvil housing thereby providing free rotational movement of the anvil housing around the tool.

Abstract: A fastening system including a two piece swage type fastener including a pin and a collar adapted to be swagged into circumferentially extending lock grooves in the pin and with the collar having a radially inwardly extending flexible tab located at one end and being engageable with the lock grooves for pre-assembling the work pieces to be secured prior to swage.

Abstract: Method and Tool for removing a swaged collar from a pin member of a lockbolt type fastener by using a tool having a housing with an opening therein having opposite wall, one wall having a pair of fixed spaced blades extending longitudinally of the collar and the other opposite wall having a piston operated ram, whereby said ram forces said collar against said blades to cut through and spread said collar to separate the collar from the pin member.

Abstract: A nosepiece for setting lockbolt fasteners includes an anvil housing connected to a collet member via a roll pin. The roll pin securely anchors a drawbar within the collet to form an non-threaded connection therebetween. The drawbar is adapted to be connected to and rigidly supported within a piston of an installation tool. The rigidity of the piston and tool is transferred to the nosepiece by the drawbar so as to prevent nosepiece deflection during setting of the lockbolt.