Improvements in or with respect to a security device

摘要

An inflatable element adapted to be inflated with gas from a gas generator (2) includes a gas flow duct (6) leading from the gas generator to a plurality of cells (8, 9, 10, 11, 12) which are to be inflated. An elongate element (20) having a plurality of substantially helical turns is within the gas flow duct, the axis of the elongate element being substantially coincident.