Blind fastener device

Claim 1

A fastener device for installation in at lease one structural member to hold it to another member or to provide an anchor therein, said device comprising: a main rivet body formed of relatively soft and readily bendable material having an enlarged head at one end with a central bore and a series of spaced apart slot means extending axially from its other end throughout a substantial portion of the axial extent of said rivet body to form bendable sectors; an elongated pin substantially longer than said rivet body, having a shank with a constant diameter and an enlarged integral pin head at one end having a bearing shoulder extending at substantially right angles to the longitudinal axis of said pin, said pin shank being adapted to extend through said central bore of said rivet body; a generally cylindrical sleeve shaped member of readily, deformable flowable material surrounding said pin located between and axially aligned with said bendable sectors of said rivet body and said pin head bearing shoulder, the diameter of said bearing shoulder being substantially at least as great as the outer diameter of said sleeve shaped member, said sleeve shaped member having an external frusto conical surface on one end adjacent to and engageable with an internal frusto conical surface at the end of said rivet body having said slot means, said sleeve shaped member being adapted to press against and splay apart said bendable sectors by becoming progressively larger in diameter when compressed by axial force exerted against one end of said sleeve member by said pin head; whereby said bendable sectors are caused to extend radially from said rivet body and pressed generally flat against the inner surface of said structural member.