Patent ID: 7658577

Claim:
A fastening device for fastening a movable element to a structure of an aircraft in the event of turbulence during flight, the movable element having a trolley and being located in a cabin of the aircraft, the fastening device comprising: a first belt retractor having a first retractable belt capable of unrolling from the first belt retractor during normal use of the movable element unless the aircraft is acted on by an external force and the first belt retractor having a first fitting; and a second belt retractor having a second retractable belt capable of unrolling from the second belt retractor during normal use of the movable element unless the aircraft is acted on by the external force and the second belt retractor having a second fitting; a support member coupling the first belt retractor with the second belt retractor, such that when the support member, the first belt retractor and the second belt retractor couple the movable element to the structure of the aircraft by mounting the first support member, the first belt retractor and the second belt retractor on the movable element and attaching the first fitting to a first portion of the structure of the aircraft and the second fitting to a second portion of the structure of the aircraft, and when the external force, having a force component acting vertically upward, acts on the aircraft, then the first belt retractor prevents unrolling of the first belt by more than a predefinable range and the second belt retractor prevents unrolling of the second belt by more than a predefinable range.