Metal working – Means to assemble or disassemble – Means to drive self-piercing work part
Reexamination Certificate
2006-08-29
2006-08-29
Bryant, David P. (Department: 3726)
Metal working
Means to assemble or disassemble
Means to drive self-piercing work part
C029S896900, C227S008000, C227S009000, C267S177000, C267S277000, C267S278000
Reexamination Certificate
active
07096577
ABSTRACT:
A firing mechanism of an explosively actuated tool for driving a fastener into a substrate includes a cocking rod and sear for entraining the firing pin with the firing pin being releasable on cocking by rotation of the sear. The cocking rod and sear form a structure subject to an axial and rotational bias by a coil spring anchored at one end to the structure and at the opposite end to a mounting which during assembly of the mechanism is rotated to apply torsional loading to the spring and is then locked into a housing of the mechanism in an angular orientation in which torsional loading is maintained in the spring.
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Bryant David P.
Cetram PTY Limited
Koehler Christopher M.
Lowe Hauptman & Berner LLP
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