Unitary plastic boat lift buoyancy tank
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United States of America Patent
Stats
-
Jun 22, 2004
Grant Date -
Nov 21, 2002
app pub date -
May 17, 2001
filing date -
May 17, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A plastic rotationally molded polyethylene buoyancy tank for boat lifts allows connection of steel to lengthwise grooves molded into each side of the buoyancy tank. Preferably, a plastic bulkhead is formed within the tank during its molding process. A segment of framing steel is bracketed between a pair of inwardly tapered compressible opposed grips. The compressible grips each have outwardly tapered slots with mating tapered rigid inserts. With the inserts partially seated on the grips, the grips are slipped lengthwise or pressed laterally into their respective grooves. Bolts extending through the grips into threaded holes in the inserts are tightened to pull the grips over their tapered inserts. This spreads and compresses the grips in their respective grooves, locking the brackets and connecting steel in place on top of the tanks.
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