Patent ID: 6789993
Filing Date: 2004-09-14
Classification: F16B

Abstract:
A fastener comprising a bolt, a nut, and a movable collar,wherein the bolt comprises a bolt head and a bolt shank, the bolt shank extending from the bolt head and having external threads thereon, wherein the nut comprises a first nut engaging portion for engagement with the external threads of the bolt shank, and a second nut engaging portion for engagement with the movable collar, the second nut engaging portion being integrally formed with the first hut engaging portion, wherein the nut is capable of being threaded onto the bolt through the first nut engaging portion, wherein the movable collar comprises a first collar engaging portion for engagement with the external threads of the bolt shank, and a second collar engaging portion for engagement with the second nut engaging portion of the nut, wherein the movable collar is capable of being threaded onto the bolt through the first collar engaging portion and is capable of being threaded into the nut through the second collar engaging portion and the second nut engaging portion, wherein the second collar engaging portion comprises an external thread forming portion formed with an external thread of an opposite hand with respect to the external thread formed on the bolt shank, wherein the nut comprises an extended cylindrical-shaped portion extended in an axial direction and having an extended outer-peripheral surface and an extended inner-peripheral surface, the extended cylindrical-shaped portion comprising a cavity defined by the extended inner-peripheral surface, the extended inner-peripheral surface comprising an internal thread forming said second nut engaging portion for threading onto the external thread formed on the second collar engaging portion, and, one end of the cylindrical-shaped portion having a flange formed as a single piece with the cylindrical-shaped portion, the flange having a central opening forming said first nut engaging portion, wherein the movable collar is receivable in the cavity when it is threaded and inserted into the nut, and wherein, with the movable collar being received in the cavity, the second nut engaging portion of the nut is inserted through an opening formed in one of two members formed with openings, and the bolt is threaded into the movable collar through the opening formed in the other of the two members and then torque is applied to the bolt head, the movable collar is extended toward the other of the two members from the cavity and the nut is threaded onto the bolt through the first nut engaging portion, whereby the one of the two members is latched on the nut and the other of the two members is latched on the movable collar, so that the two members are fastened by the bolt head, the nut, and the movable collar.