Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1992-12-09
1994-02-15
Smith, Scott
Metal working
Method of mechanical manufacture
Assembling or joining
227130, 227134, B25C 104
Patent
active
052855627
ABSTRACT:
An apparatus for installing a pushnut fastener on a rod or stud comprises a body having a guideway extending axially thereof with a pushrod mounted in the guideway and having a sleeve-like end portion movable between a first position extending out of the body and a second position within the body. A radially resilient tubular chuck having an open inlet end and open outlet end is joined to the body for holding a fastener in axial alignment with the sleeve-like end portion of the pushrod when the pushrod is in the first position. An air cylinder functions to move the pushrod from the second to the first position when energized and to return the pushrod to the first position when de-energized. A feed line supplies pushnut fasteners to the inlet end of the chuck when the pushrod is in the second position and a drive assembly is operable when the air cylinder is energized for driving the pushrod from the first position to a third position inwardly beyond the second position. A trigger element is arranged for selectively releasing the drive assembly after the pushrod has been driven to the third position to permit the air cylinder and pushrod to suddenly return to the first position and drive the fastener into its located position on the rod or stud.
REFERENCES:
patent: 2492509 (1949-12-01), Vandervieren
patent: 2558403 (1951-06-01), Wandel
patent: 2746042 (1956-05-01), Turner
patent: 2765463 (1956-10-01), De Anguera
patent: 3091768 (1963-06-01), Whitney
patent: 3636707 (1972-01-01), Saari et al.
patent: 3776444 (1973-12-01), Kuehn et al.
patent: 4479601 (1984-10-01), Hara
patent: 4627563 (1986-12-01), Meyer
patent: 5174486 (1992-12-01), Latal et al.
Smith Scott
TRW Inc.
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