Air flow controller for pneumatically operated watercraft lifts
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United States of America Patent
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Mar 31, 2015
Grant Date -
N/A
app pub date -
Oct 11, 2006
filing date -
Oct 11, 2006
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Abstract
An air flow controller for a pneumatically operated watercraft lift has a valve for opening and closing the air line to the pontoon and a manifold with a gate. The gate is biased to a first orientation in which air from the pontoon can be exhausted only to the atmosphere when the lift blower is switched “off.” When the blower is switched “on,” air flow from the blower moves the gate into a second orientation in which the blower can force air only into the pontoon. This configuration prevents flow of water into the blower during lowering of the pontoon while using relatively few and simple valve system components.
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