Elongated-member-driving apparatus – With interlock means
Reexamination Certificate
2007-06-26
2007-06-26
Nash, Brian (Department: 3721)
Elongated-member-driving apparatus
With interlock means
C227S120000, C227S129000, C227S132000
Reexamination Certificate
active
11305773
ABSTRACT:
A safety mechanism to prevent unintended ejection of a staple or fastener in a stapler or fastening tool. A low-start version of the stapler has a handle that when pressed pivots a lever which lifts a striker and energizes a power spring. At the release point, the striker is released and accelerated under spring bias into a staple, ejecting the staple by impact blow. A high-start version has the striker stationary in the upper position as the power spring is energized. In the safety mechanism, a movable hook or arm selectively prevents the striker, and linked components thereto, from completing an operational cycle. In one embodiment the safety mechanism includes a working surface sensing button bar operating in conjunction with the hook that latches the striker. The safety mechanism can also be a pivoting lock bar that engages the working surface, which surface pivots the lock bar into engaging the power spring, handle, and/or striker thereby preventing such components from reaching the release point.
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Feng Paul Y.
Fulwider Patent LLP
Nash Brian
Worktools, Inc.
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