Patent ID: 9598270
Date: 2017-03-21
CPC Classifications: B66F

Claim:
1. A lifting system comprising: a lifting bag configured to expand in a first direction between a deflated configuration and an inflated configuration upon being filled with compressed gas, the lifting bag comprising: wherein, when the lifting bag is in the deflated configuration, the continuous surface includes a plurality of surface undulations that provide a low height profile of the lifting bag, the plurality of surface undulations having a height varying between a first deflated undulation height and a second deflated undulation height; and wherein, when the lifting bag is in the inflated configuration, the continuous surface has a relatively smoother surface as compared to the continuous surface in the deflated configuration, and wherein a relative difference between the first and second deflated undulation heights is greater than a relative height difference of any remaining features of the surface undulations, and wherein the lifting bag has a higher height profile in the inflated configuration.