Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Reexamination Certificate
2007-03-06
2007-03-06
Wilson, Lee D. (Department: 3723)
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
C029S267000, C029S270000, C030S092000, C269S006000
Reexamination Certificate
active
11060201
ABSTRACT:
A tool installs barb emitters in irrigation tubing. The tool has a cradle which receives irrigation tubing and a punch mounted opposite the cradle. The punch has a first cylinder and a second cylinder telescopically received within the first cylinder. The first cylinder has a cap at the upper end and an annular ring extending inwardly from to partially occlude the lower end. The second cylinder includes a second cap at the upper end which slidably engages the first cylinder and is resiliently urged by a spring against the annular ring. The cap has a punch holder extending downwardly therefrom. A needle has a sharp tip extending downwardly from the punch holder through the second cap to a point within the second cylinder when the spring is fully extended and beyond the second cylinder when the spring is fully compressed. One of the jaws has a knife blade extending from the other end thereof opposite. The of the jaws defines a semi-circular concave anvil at the other end. The anvil has an axially extending slot therein which receives the cutting edge of said knife blade when the handles are closed together.
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McGue Frank J.
Wilson Lee D.
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