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US 5,662,446 AGranted
Easy lock safety spring cotter pin
OwnerLouis R. Haaninventor
Life of this patent
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OwnerLouis R. Haaninventor
Estimating the term…
A twist lock insertion and twist release extraction type spring cotter pin having one primary straight end extremity to be inserted through an aperture in a structural element and its opposite adjacent free end extremity consisting of a series of arcuate curves allowing them to partially rotate or counter rotate about the surface of said structural element. And, commensurate with this, an easy grasp handle all made of spring steel type wire. The method of said designed invention allows for a new definition of utility for a spring cotter pin of this particular unique function the extraordinary characteristics of which demonstrate a locking spring pins basic need for a revision of often ignored operational safety features without compromising the new standards it has attained for ease of function yet maintaining its overall convenience, reliability and durability.
A spring cotter pin comprising a body formed of a single length of spring steel stock, bent to provide a substantially U-shaped pin with a handle portion at one end and two legs extending from the handle portion, one of said legs being straight and constituting a lock pin, adapted to be inserted through an aperture formed in a structural element, and the other said leg having plural outwardly bowed sections which assist in retaining the lock pin in the aperture.
A spring cotter pin comprising a body formed of a single length of spring steel stock, bent to provide a substantially U-shaped pin with a handle at one end and two legs extending from the handle, one of said legs being straight and constituting a lock pin, adapted to be inserted through an aperture formed in a structural element, and the other said leg having an outwardly bowed section bent in the form of a helix, whereby rotation of the cotter pin in one direction tends to pull the straight leg into the structural element aperture, and rotation in the opposite direction tends to push it back out of the aperture.
Dependencies are inferred from the claim text.