Butterfly cotter pin
A resilient cotter pin that has longitudinal central portions that fit in the through hole of a related part. Shoulders connected to longitudinal portions abut the through hole and support curvilinear arms that terminate in an inwardly directed projections that engage a related castellated nut.
1. A cotter pin comprising:
a central pin that is defined by longitudinal portions;
each longitudinal portion is connected to a base at a first end and to a shoulder at a second end;
each shoulder is perpendicular to the respective longitudinal portion and supports a curvilinear arm; and
each curvilinear arm extends toward the base and terminates in a free end that has an inwardly directed portion that bends toward a respective shoulder.
2. The cotter pin of claim 1 , wherein each curvilinear arm has a concave portion and a convex portion.
3. The cotter pin of claim 2 , wherein the inwardly directed portion of each curvilinear arm extends from the convex portion.
4. The cotter pin of claim 1 , wherein each of the curvilinear arms has a modified “S” shape.
5. The cotter pin of claim 1 , wherein each of the curvilinear arms has a modified “J” shape.
6. The cotter pin of claim 1 , wherein the cotter pin is a single unitary construction of spring steel.
7. The cotter pin of claim 1 , wherein the cotter pin is a unitary piece having a resilient construction.
8. A cotter pin comprising:
a central member that is defined by longitudinal portions;
each longitudinal portion is connected to a base at a first end and open at a second end that has a horizontal shoulder; and,
two curvilinear arms;
wherein each curvilinear arm depends from a respective horizontal shoulder, extends towards the base, and terminates in an inwardly directed projection that extends toward a respective second end of a longitudinal portion.
9. A cotter pin comprising:
a unitary resilient structure having,
a central pin with longitudinal portions that are joined by a base at one end and separated at a second end that is joined to a horizontal portion; and,
two curvilinear arms that each depend from a respective horizontal portion joined to a respective second end of a longitudinal portion and each curvilinear arm terminates in a free end that is directed inwardly toward a respective longitudinal portion and extends toward a respective second end of a longitudinal portion.
10. The cotter pin of claim 9 , wherein each curvilinear arm has a concave portion and a convex portion.
11. The cotter pin of claim 10 , wherein the free end of each curvilinear arm extends from the convex portion.