Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1984-08-24
1986-02-11
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29157T, 29432, 29513, 126153, 126292, 138 39, 285189, 285424, B21D 5300, B21D 3900, F23L 1300, F15D 114
Patent
active
045691100
ABSTRACT:
A duct fitting for connecting a branch duct to a main duct including a tubular body having cutting teeth formed on one end thereof for cutting a hole in the main duct by pressing the cutting teeth against the main duct and rotating the tubular body about its longitudinal axis. Subsequent to cutting of the hole, the cutting teeth are bent into engagement with the interior of the main duct to squeezingly hold the main duct between the bent over teeth and a resiliently deflectable mounting flange provided on the tubular body. An air diversion scoop is mounted in the bore of the tubular body and is pivotably moved so that a portion of the scoop extends from the tubular body into the main duct.
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Goldberg Howard N.
Haynes, Jr. Herbert E.
Wallace Ronald S.
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