Adjustable four-weight shaker head
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United States of America Patent
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Nov 11, 1997
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N/A
app pub date -
Oct 6, 1995
filing date -
Oct 6, 1995
priority date (Note) -
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Abstract
The invention provides a shaker with a set of primary eccentric weights and secondary eccentric weights. The invention rotates the primary and secondary eccentric weights at the same speed, but may on the fly change the rotational phase between the primary and secondary eccentric weights, causing an on the fly change of amplitude of the inventive shaker.
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