Method of fastening a first member to a second member

Details Method of fastening a first member to a second member Method of fastening a first member to a second member

1999-05-12

2000-10-03

Bryant, David P.

Metal working

Method of mechanical manufacture

Assembling or joining

2952505, 2952511, 411412, 411335, B23P 1100, B21J 1502, F16B 3504

Patent

active

061255262

ABSTRACT:
A method of fastening a first member to a second member. The first member has a first opening with first left handed threads that extend from a first surface to a second surface. A stud having a shaft with a first section having right handed threads that extend from an end to a first groove, a second section with second left handed threads that extend from the first groove to a second groove adjacent a head and a radial surface that extends on an angle from the second groove toward a peripheral surface on the head is obtained from a supply source. The shaft is inserted into the first opening to engage the first and second left handed threads and an initial torque is applied to the head to bring the radial surface into engagement with the first left handed threads. Thereafter, additional torque is applied to the head to cause the radial surface to engage and deform a portion of the first left handed threads as the peripheral surface is moved into engagement with the second surface. A reversing torque is applied to the head to move the peripheral surface away from the second surface and permit the second end to pivot in a corresponding arc with respect to the axis of the first opening. A second member is obtained from a supply and a second opening therein is aligned with the second end of the shaft. A nut is placed on the right handed threads and an initial torque applied to the nut to bring the second housing into engagement with the first surface. Thereafter, a final torque is applied to the nut to cause the first and second left handed threads to corresponding rotate and bring the head into engagement with the second surface and create a desired compressive force between the nut and head to fasten the second member with the first member.

REFERENCES:
patent: 2931411 (1960-04-01), Keehan
patent: 3163079 (1964-12-01), Schertz
patent: 3418012 (1968-12-01), Torre
patent: 4018132 (1977-04-01), Abe
patent: 4790702 (1988-12-01), Maganias
patent: 4815907 (1989-03-01), Williamson et al.
patent: 4877364 (1989-10-01), Sorrentino
patent: 5233833 (1993-08-01), Last, Jr. et al.
patent: 5609454 (1997-03-01), Lee

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