Elongated-member-driving apparatus – With interlock means
Patent
1993-01-04
1993-11-16
Smith, Scott A.
Elongated-member-driving apparatus
With interlock means
227142, B25C 108
Patent
active
052615871
ABSTRACT:
In a fastener-driving tool, a primary structure, an intermediate structure, and a secondary structure are separately movable along a tool axis. The primary structure is biased to a tool-disabling position, is movable along the tool axis to a tool-enabling position, and is engaged by an upper end of the intermediate structure. The secondary structure has a lower end to be firmly pressed against a workpiece. A bolt is threadedly adjustable within an axial socket of the intermediate structure. A spring disposed around the bolt shank, between the bolt head and a flange on the secondary structure, biases the intermediate structure in one direction. The bolt head has flat surfaces, one of which is engaged by a tab on another flange of the secondary structure so as to prevent bolt rotation unless the secondary structure is moved against the spring bias, whereupon the bolt can then be rotated.
REFERENCES:
patent: 4767043 (1988-08-01), Canlas, Jr.
patent: 4821937 (1989-04-01), Rafferty
patent: 4903880 (1990-02-01), Austin et al.
patent: 5054678 (1991-10-01), Nasiatka
patent: 5069379 (1991-12-01), Kerrigan
patent: 5197646 (1993-03-01), Nikolich
Illinois Tool Works Inc.
Smith Scott A.
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