Safety assembly for a tool for driving fasteners

Details Safety assembly for a tool for driving fasteners Safety assembly for a tool for driving fasteners

1979-07-02

1981-04-07

McQuade, John

Elongated-member-driving apparatus

With interlock means

B25C 104

Patent

active

042600928

ABSTRACT:
A tool for driving fasteners includes a driver and a device for actuating the driver through a driving stroke. The tool is operated by a trigger assembly that includes a manually actuated trigger pivotally mounted on the tool and a lever pivotally mounted at a first end to the trigger. Also included on the tool is a safety assembly that before the tool can be fired must be actuated prior to actuation of the trigger. The safety mechanism includes a push rod slideably mounted within the tool with a first end engaging a safety yoke and a second end adjacent the lever of the trigger assembly. The safety yoke is slideably mounted on the nose of the tool and is adapted to extend below the nose of the tool to engage the workpiece upon placement of the tool onto the workpiece. As the tool is placed against a workpiece prior to actuation of the trigger, the yoke and, thus, the push rod are moved upwardly until the second end of the push rod engages the lever placing the trigger assembly in an operative mode. As the trigger is thereafter actuated, the lever is pivoted to actuate the tool and drive a fastener. The safety assembly includes an engagement or locking element on the second end of the rod that locks the second end of the lever in an inoperative position if the trigger is actuated prior to the placement of the tool onto the workpiece.

REFERENCES:
patent: 2498503 (1950-02-01), Papalia
patent: 3011169 (1961-12-01), Cast et al.
patent: 3194324 (1965-07-01), Langas
patent: 3464614 (1969-09-01), Volkmann
patent: 3612379 (1971-10-01), Panock
patent: 3784077 (1974-01-01), Burke, Jr. et al.

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