US 10,113,579 B2Granted

Hybrid composite-metal breakaway nut fastener

AssigneeNmc Group, Inc.

InventorsMark Anthony Balderrama, James D. Karls

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Abstract

A breakaway nut fastener is provided having a hybrid construction of plastic and metal. The breakaway nut fastener includes a head portion and a nut portion connected by a thin walled section. The head portion is made of plastic and has a shape so as to mate to a tool. The nut portion has an exterior shell having a cavity for receiving a nut insert. The nut portion's exterior shell is made of plastic while the nut insert is made of metal. The breakaway nut fastener's thin walled section is also made of plastic joining the breakaway nut fastener's head portion and the nut portion's exterior shell. The thin walled section is made of plastic, and preferably the head portion, nut portion and thin walled section are constructed as one part forming a single component of plastic.

Claims4

Dependent claims

A hybrid composite-metal breakaway nut fastener comprising:

a head portion having a proximal end and a distal end defining a central axis, said head portion made of plastic and having a shape so as to mate to a tool so as to be rotated;
a nut portion including an exterior shell and a nut insert, said exterior shell made of plastic and having an annular shape so as to include a proximal end and a distal inlet coaxial to said central axis, said nut insert made of metal, having a circumferential exterior surface, proximal and distal ends, and a female threaded bore, said nut insert being concentrically affixed within said exterior shell so as to be able to receive a male threaded fastener through said distal inlet of said exterior shell into said female threaded bore of said nut insert;
and
a thin walled section connecting and affixing said distal end of said head portion to said proximal end of said exterior shell;
and
wherein said head portion, thin walled section, and exterior shell of said nut portion are a one piece construction of plastic.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/130,069Filed 15 Apr 2016 · us provisional application
Priority: 17 Apr 2015
Published: US 2016/0305464 A120 Oct 2016
Granted: 30 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

F16B 31/021
For indicating the attainment of a particular tensile load or limiting tensile load: by means of a frangible part
F16B 31/00
Screwed connections specially modified in view of tensile load
F16B
Devices for fastening or securing constructional elements or machine parts together

Family

Application62/149,248Us provisional application · filed 17 Apr 2015
US 2016/0305464 A1Pre-grant publication · published 20 Oct 2016
US 10,113,579 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

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