Multiple chambered lift bag
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United States of America Patent
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Apr 9, 1996
Grant Date -
N/A
app pub date -
Apr 1, 1994
filing date -
Apr 1, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lift bag includes a plurality of independently inflatable chambers for controlling lifting of objects. Each chamber is defined by an upper surface sheet and a lower surface sheet, the upper surface sheet of one chamber positioned below an adjacent chamber being securely attached to the lower surface sheet of an adjacent chamber. The lift bag can be operated at pressures of about 15 psig at specified heights which allows greater flexibility compared to conventional, single-chambered lift bag which operate at pressures of about 7 psig. Preferably, all seams, reinforcements, and fittings are vulcanized in place using uncured rubber coated fabric. Grommets or other securing means may provide further stability to the lift bag.
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