초록 ▼

This invention provides an installation tool for a fastener that includes a nut and a tubular portion having an external knurl, the tool including an internally and externally threaded sleeve, a screw extending through the sleeve and engageable with the nut of the fastener, and an internally threade

This invention provides an installation tool for a fastener that includes a nut and a tubular portion having an external knurl, the tool including an internally and externally threaded sleeve, a screw extending through the sleeve and engageable with the nut of the fastener, and an internally threaded element engaging the external threads of the sleeve and having an abutment surface at one end. Advancement of the internally threaded element causes the screw to move the fastener axially, forcing its tubular portion into an opening in a workpiece. The sleeve has a die surface at one end and is then advanced to engage the end of the tubular portion of the fastener for bending it outwardly to form a flange.

대표청구항 ▼

A fastener installation tool comprising a first member having internal threads and external threads, a second member having a threaded shank meshed with said internal threads of said first member, said threaded shank projecting beyond one end of said first member and being meshable with threads of a

A fastener installation tool comprising a first member having internal threads and external threads, a second member having a threaded shank meshed with said internal threads of said first member, said threaded shank projecting beyond one end of said first member and being meshable with threads of a fastener having a nut and a projecting tubular portion, and a third member having internal threads, said external threads of said first member meshing with said internal threads of said third member, said third member having an abutment surface at one end thereof for engaging a workpiece upon rotation of said third member relative to said first member so as to advance said third member outwardly with respect to said one end of said first member, and thereafter producing an axial reaction on said first member for causing said first member to move said threaded shank of said second member axially so that said second member can force the tubular portion of such a fastener into an opening in the workpiece with the end of said tubular portion projecting therebeyond, said one end of said first member having a die surface for engaging the end of such a tubular portion when so forced into an opening in a workpiece upon rotation of said first member relative to said third member so as to cause advancement of said first member relative to said third member, for deflecting said end of said tubular portion against said workpiece for forming a retention flange.