Square-headed rivet fastener
AssigneeFalcon Fasteners Reg'D
InventorVolkmar Leistner
Life of this patent
Estimating the term…
Abstract
A fastener includes a generally square flange having arcuate corners. Eight upstanding ribs are provided, equally spaced about the periphery of the flange. When the fastener is inserted in a piece of material, the ribs dig into the surface of the piece of material to prevent the fastener from rotating when a threaded fastener is advanced into the opening through the shaft from the opposite side. Extending upwardly from the top surface of the flange is an elongated shaft having two adjacent regions, one adjacent the flange having relatively thicker threaded walls and another distal from the flange having thinner unthreaded walls.
Claims34
A fastener comprising:
- a) a flange having a generally square periphery including four straight sides with opposed sides being parallel and adjacent sides perpendicular;
- b) said flange including an upstanding rib intersecting each straight side;
- c) a hollow shaft extending upwardly from said flange, said flange having an opening aligned with said shaft;
- d) said shaft having a first end adjacent said flange and a second end remote therefrom;
- e) said first end of said shaft having female threads and said second end of said shaft being unthreaded.
A fastener comprising:
- a) a flange having a generally square periphery including four straight sides with opposed straight sides being parallel and adjacent straight sides perpendicular, and wherein between each pair of adjacent straight sides, an arcuate side is provided;
- b) said flange including an upstanding rib intersecting and bisecting each side;
- c) a hollow cylindrical shaft extending upwardly from said flange, wherein said shaft has an axis of elongation perpendicular to said flange, said flange having a tapered opening aligned with said shaft;
- d) said shaft having a first end adjacent said flange and a second end remote therefrom;
- e) said first end of said shaft having female threads and a relatively thicker wall and said second end of said shaft being unthreaded and having a relatively thinner wall.
A fastener comprising:
- a) a flange having a generally square periphery including four straight sides with opposed sides being parallel and adjacent sides perpendicular;
- b) said flange including a flat top surface except for the presence of at least one upstanding rib;
- c) a hollow shaft extending upwardly from said flange;
- d) said shaft having a first end adjacent said flange and a second end remote therefrom;
- e) at least a portion of said shaft having female threads.
Dependencies are inferred from the claim text.