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US 4,299,519 AGranted
Two piece fastener and installation tool
AssigneeHuck Manufacturing Company
InventorRobert J. Corbett
Life of this patent
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AssigneeHuck Manufacturing Company
InventorRobert J. Corbett
Estimating the term…
A two piece pull-type fastener is disclosed herein comprising a pin and collar adapted to be swaged into locking engagement with the pin upon setting of the fastener by application of a pulling force to the pin and reaction force on the collar. The pin is provided with a minimum number of pull grooves defined by alternating crests and valleys which grooves are sufficient in strength to allow an installation tool to exert a pulling force on the pin of a magnitude required to properly set the fastener. The installation tool has a gripping structure adapted to engage the pull grooves. The gripping structure and pull grooves are complementarily shaped so as to prevent engagement of less than all of the pull grooves by the gripping structure of the tool in order to prevent stripping of the pull grooves if less than all are attempted to be engaged. Thus an installation tool nose assembly is also disclosed which nose assembly is uniquely designed for use with the present fastener. In a preferred form of the invention, the pull grooves of the fastener are provided on a pintail portion of the fastener. In a different form of the invention the pull grooves are located within an opening in the end portion of the pin.
In a system for securing a plurality of workpieces including a two piece pull-type fastener comprising a pin and a swageable collar, an installation tool having a collet assembly including a jaw portion having a plurality of teeth engageable with a plurality of pull grooves provided on said pin and an anvil engageable with said collar, said jaw portion being operative to exert a pulling force on said pin so as to cause said anvil to swage said collar into engagement with a plurality of locking grooves provided on said pin, improved means for enabling said installation tool to exert said pulling force on said pin so as to thereby set said fastener comprising at least a predetermined number of pull grooves provided on said pin, said plurality of teeth on said jaw portion being at least equal to said predetermined number of pull grooves, disabling means on said installation tool and said pin for preventing gripping engagement by said teeth of less than said predetermined number of pull grooves whereby stripping of any of said predetermined number of pull grooves by applying said pulling force through less than all of said predetermined number of pull grooves is inhibited.
In a system for securing a plurality of workpieces including a two piece pull-type fastener comprising a pin and a swageable collar, said pin having a shank including a pintail portion and having an enlarged head, an installation tool having a collet assembly including a plurality of jaws each having a plurality of teeth engageable with a plurality of pull grooves provided on said pin and an anvil engageable with said collar, said jaw portion being operative to exert a pulling force on said pin so as to cause said anvil to swage said collar into engagement with a plurality of locking grooves provided on said pin, improved means for enabling said installation tool to exert said pulling force on said pin so as to thereby set said fastener comprising at least a predetermined number of pull grooves provided on said pin, said plurality of teeth on each of said jaws being at least equal to said predetermined number of pull grooves, said predetermined number of said pull grooves having a total effective shear area relative to said teeth to enable a pulling force of a preselected minimum magnitude, said minimum magnitude being greater by an amount compensating for variations in manufacturing, dimensional and material tolerances than that ideally necessary to set said fastener by said installation tool when said jaws engage at least said predetermined number of pull grooves, disabling means on said installation tool and said pin for preventing gripping engagement by said teeth of less than said predetermined number of pull grooves whereby stripping of any of said predetermined number of pull grooves by applying said pulling force through less than all of said predetermined number of pull grooves is inhibited.
In a fastening system for joining a plurality of workpieces including a two piece pull-type fastener having a swageable collar and a pin including a shank and a head provided at one end of said shank portion, an installation tool having an anvil and a collet provided with jaws engageable with a plurality of pull grooves provided on a pintail portion disposed at another end of said shank whereby said installation tool is operative to exert a pulling force on said pin so as to enable said anvil to swage said collar into engagement with locking groove means provided on said shank portion between said pintail portion and said head, improved means for exerting said pulling force wherein said pintail portion is of a length approximately the nominal diameter of said shank portion and said plurality of pull grooves includes at least a predetermined number, each of said predetermined number of pull grooves having an effective shear area associated therewith, said predetermined number of said pull grooves having a total effective shear area to enable a pulling force of a preselected minimum magnitude with said magnitude being just greater than that ideally necessary to set said fastener by said installation tool when said jaws are engaged with said predetermined number of pull grooves, said magnitude including an amount compensating for predetermined variations between fasteners and said jaws whereby the length of said pintail portion is minimized.
A pull-type fastener for securing a plurality of workpieces together comprising:
A pull-type fastener for securing a plurality of workpieces together comprising:
In a system for securing a plurality of workpieces together by means of a two piece fastener including a pin having a shank with a head provided at one end, a swageable collar, an installation tool having an anvil and a collet assembly provided with a plurality of jaws engageable with a plurality of pull grooves provided on the shank whereby said installation tool exerts a pulling force on the pin so as to enable said anvil to move into engagement with said swage the collar into a plurality of lock grooves provided on the shank between the head and the pintail portion, the improvement comprising:
A pull-type fastener for securing a plurality of workpieces together comprising:
In a system for securing a plurality of workpieces including a pull-type fastener comprising a pin having a shank including a pintail portion and having an enlarged head, an installation tool having a collet assembly including a plurality of jaws each having a plurality of teeth engageable with a plurality of pull grooves provided on said pin and an anvil engageable with collar means, said jaw portion being operative to exert a pulling force on said pin so as to set said fastener and to cause said anvil to move said collar means into engagement with lock groove means provided on said pin, improved means for enabling said installation tool to exert said pulling force on said pin so as to thereby set said fastener comprising at least a predetermined number of pull grooves provided on said pin, said plurality of teeth on each of said jaws being at least equal to said predetermined number of pull grooves, said predetermined number of said pull grooves having a total effective shear area relative to said teeth to enable a pulling force of a preselected minimum magnitude, said minimum magnitude being greater by an amount compensating for variations in manufacturing, dimensional and material tolerances than that ideally necessary to set said fastener by said installation tool when said jaws engage at least said predetermined number of pull grooves, disabling means on said installation tool and said pin for preventing gripping engagement by said teeth of less than said predetermined number of pull grooves whereby stripping of said predetermined number of pull grooves by applying said pulling force through less than all of said predetermined number of said pull grooves is inhibited.
A pull-type fastener for securing a plurality of workpieces together comprising:
In a system for securing a plurality of workpieces together by means of a two piece fastener including a pin having a shank with a head provided at one end, collar means, an installation tool having an anvil and a collet assembly provided with a plurality of jaws engageable with a plurality of pull grooves provided on the shank whereby said installation tool exerts a pulling force on the pin so as to set said fastener including enabling said anvil to move into engagement with and swage said collar means into lock groove means provided on the shank between the head and the pintail portion, the improvement comprising:
In a system for securing a plurality of workpieces including a pull-type fastener comprising a pin having an elongated shank portion and a head provided at one end thereof, locking groove means on said shank portion, collar means adapted to be swaged into said locking groove means upon setting of said fastener, an installation tool having a collet assembly including a jaw portion having a plurality of teeth engageable with a plurality of pull grooves provided on said shank portion and an anvil engageable with said collar means, said jaw portion being operative to exert a pulling force on said pin so as to set said fastener and to cause said anvil to swage said collar means into said locking groove means, improved means for enabling said installation tool to exert said pulling force on said pin so as to thereby set said fastener comprising at least a predetermined number of pull grooves provided on said pin, said plurality of teeth on said jaw portion being at least equal to said predetermined number of pull grooves, said predetermined number of pull grooves defining a shape substantially conforming to the shape of said plurality of teeth on said jaw portion when said jaw portion is in an engaging position, said substantially conforming shape of said predetermined number and said plurality of teeth cooperating to prevent gripping engagement by said teeth of less than said predetermined number of pull grooves whereby stripping of one or more of said predetermined number of pull grooves by applying said pulling force through less than all of said predetermined number of pull grooves is inhibited.
Dependencies are inferred from the claim text.