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US 5,618,144 AGranted
Tee-nut with enlarged barrel end
AssigneeSigma Tool & Machine
InventorVolkmar W. Leistner
Life of this patent
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Abstract
A tee-nut comprises a flange head, a plurality of prongs extending from the flange head, and a hollow barrel extending from the flange head. The hollow barrel has an internally threaded portion provided at one end of the barrel connecting to the flange head, and an enlarged flarable portion extending from the internally threaded portion and provided at a free end of the barrel. The present invention further discloses a method of forming a tee-nut with an enlarged barrel end, by first swaging out and expanding the free end of the barrel and thereafter threading the unexpanded portion of the barrel.
Claims4
A tee-nut comprising:
- a flange head member;
- a plurality of prongs extending from said flange head member;
- and
- a sleeve member extending from said flange head member;
- said sleeve member, being in the form of a hollow cylindrical barrel, comprising:
- an internally threaded cylindrical portion provided at one end of said sleeve member, said threaded portion connecting to said flange head member and defining predetermined first inner and first outer diameters;
- and
- an enlarged cylindrical portion extending from said internally threaded cylindrical portion and provided at a free end of said sleeve member and defining predetermined second inner and second outer diameters, wherein said second outer diameter of said enlarged cylindrical portion is larger than said first outer diameter of said internally threaded portion, and wherein said second inner diameter of said enlarged cylindrical portion is larger than said first inner diameter of said internally threaded portion such that a threading tool can be passed through said enlarged cylindrical portion, and can be operated to internally thread said internally threaded portion.
5 more elements
Dependencies are inferred from the claim text.