A self-aligning bracket for use in mounting a planar surface such as a roof to a fixed structure such as a bank of fuel cylinders mounted to the roof of a vehicle frame. The bracket provides a locating block on a saddle mount which co-operates with a depression formed on the inner surface of the roof...http://www.google.ca/patents/US6986494?utm_source=gb-gplus-sharePatent US6986494 - Self-aligning mounting bracket and system for mounting a planar structure to a fixed structure
