Newfrey Lcc

Darren Hull

Geoffrey Weeks

Guy Jackson

Steve Godwin

Stephen Godwin

A blind rivet assembly includes a mandrel having a male threaded portion at its distal end to be screwed into an internal female threaded portion of a rivet body. The mandrel has a section of enlarged diameter adjacent the male threaded portion joined by a breaker groove to a pulling portion. The section of enlarged diameter is accommodated within an internal bore of the collapsing portion of the rivet body, the collapsing portion having a radial groove on the outer surface thereof for improving the radial expansion of the rivet when installed. A shoulder in the internal bore supports a sealing ring. When assembled correctly, the pulling portion breaks off at the breaker groove.

Blind rivet

A method of monitoring the setting operation for a blind fastener comprising the step of measuring, as a function of time, an electronic signal indicative of the load being applied to the fastener during the setting operation and, from which, determining a mandrel entry load and associated mandrel entry time from this measured signal and an associated setting time, subsequently determining the time difference between the mandrel entry time and the setting time and comparing this time difference against a predetermined reference time difference associated with that particular fastener type to determine whether the set fastener complies with predetermined acceptable setting procedures.

Growing community of inventors

West Midlands, United Kingdom

Darren Hull