Weight-discriminating bird feeder
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United States of America Patent
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-
Sep 23, 2003
Grant Date -
Jul 24, 2003
app pub date -
Jan 23, 2002
filing date -
Jan 23, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Unattached weights, namely: balls, which are confined and obscured in a housing, are lifted by inner ends of pivotably mounted perches in response to an undesirable, rapacious, and weighty bird, or squirrel, alighting upon, or clasping at the outer, extending portions of the perches. The ball-lifting, perch ends are cradles, and the cradles and balls define a relative, rolling friction therebetween which, in cooperation with a mechanical advantage of the extending portion of the perches vis-a-vis the cradles, demonstrate a diminishing resistance as the perches rotate downwardly and dislodge the unwelcome creature.
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