Ceramics spike pin

Details Ceramics spike pin Ceramics spike pin

1990-04-23

1991-02-19

Sewell, Paul T.

Boots, shoes, and leggings

Boots and shoes

Occupational or athletic shoe

36126, 36127, 36 67A, A43B 500

Patent

active

049931741

ABSTRACT:
A ceramics spike pin is provided with a pin body having a horizontal cross section of a substantially circular shape, which pin body is provided with a rounded free end portion having a predetermined radius of curvature and a connecting base portion having a predetermined radius of curvature, and a horizontally expanded base connected to the connecting base portion, wherein a diameter (d) of the connecting base portion in horizontal cross section, the radius of curvature(r) of the connecting base portion, and a maximum diagonal length (D) of the horizontally expanded base satisfy the relationship of 0<r<d<D and r.sup.2 .times.d/D.gtoreq.1.36. Accordingly, the stress concentration can be greatly relieved, and the impact resistance can be improved to thereby the durability.

REFERENCES:
patent: 2774151 (1956-12-01), Dahlquist et al.
patent: 4667425 (1987-05-01), Effler et al.

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