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US 4,787,790 AGranted
Stud fastening assembly
AssigneeRexnord Inc.
InventorYoji Shirai
Life of this patent
Estimating the term…
Abstract
A stud fastening assembly 10 including a stud 11 having a threaded end threadable into a hole 15 formed in a workpiece 16 and a plurality of serrated rings 21 and 22 for securing the stud in place. The serrated rings include inner serrations 20 sized to slidably engage longitudinal serrations 14 formed on a mid-section of the stud and further include outer serrations 19 configured to engage the sidewalls of the hole formed in the workpiece and thereby prevent relative rotation. The lower ring includes fewer outer serrations than does the upper ring, to facilitate installation.
Claims4
A stud fastening assembly comprising:
- a stud having a end section adapted to threadedly engage a threaded hole in a workpiece and further having a central section with longitudinal serrations;
- and
- lower and upper fastening rings, each ring having inner serrations complementary to the longitudinal serrations of the stud and outer serrations configured to engage the threaded hole in the workpiece, wherein the lower and upper fastening rings are positioned to encircle the stud, and wherein the lower ring includes fewer outer serrations than does the upper ring.
Dependencies are inferred from the claim text.