Patent ID: 7740279

Claim:
A shoulder restraint attachment device for anchoring a shoulder restraint to a motor vehicle roof, said device comprising: (1) a bolt having a head and a threaded shaft capable of passing through a hole in a sheet of metal that constitutes a portion of the motor vehicle roof; (2) a mandrel having a hole capable of passing the shaft of the bolt, a nose region capable of downwardly deforming a portion of the sheet metal surrounding a hole in the motor vehicle roof to create a downwardly directed cavity having a downwardly directed dome configuration and a curved upper surface region and a countersunk region for receiving a head of the bolt having a curved top surface; (3) a cup having a hole capable of passing the shaft of the bolt and a downwardly directed interior cavity having a downwardly directed dome configuration that is generally complementary with the size and configuration of the nose region of the mandrel; and (4) a nut having threads capable of threadedly cooperating with the threads of the bolt.