Valves and valve actuation – Rotary valves – Butterfly
Patent
1987-03-23
1987-12-29
Chambers, A. Michael
Valves and valve actuation
Rotary valves
Butterfly
251305, 137315, F16K 122
Patent
active
047155817
ABSTRACT:
A damper to be pivotally mounted and eventually clamped in a cylindrical air duct includes a circular damper blade, a first pivot pin extending integrally radially outwardly from the blade, a damper clip mounted on the opposite side of the blade to have a slidably mounted second pivot pin extending radially outwardly from the blade on the same diameter as the first pin. The blade is provided with a pair of parallel, spaced-apart and upstanding positioning beads situated to positively position the damper clip and the axis of the second pivot pin. A pair of parallel, spaced-apart elongate, upstanding stiffening beads are spaced from and parallel to the diametrical axes of the positioning pins.
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Chambers A. Michael
Fox John C.
Sheet Metal Connectors, Inc.
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