Mathematical graphics (1.35) Kappa curve

I don't know what this curve does to back-to-back with that sport brand. Artie's original trademark is a clover, is it also from a mathematical figure?

Here are the explanations on the wiki.

In geometry, the kappa curve or Gutschoven ' s curve are a two-dimensional algebraic curve resembling the Greek letter? (Kappa). The Kappa curve was first studied by Gérard van Gutschoven around 1662. In the history of mathematics, it is remembered as one of the first examples of ISAAC Barrow ' s application of rudimentary Calculus methods to determine the tangent of a curve. ISAAC Newton and Johann Bernoulli continued the studies of this curve subsequently.

Using the Cartesian coordinate system it can be expressed as:

X^2 (x^2 + y^2) =a^2y^2

#http://www.mathcurve.com/courbes2d/kappa/kappa.shtml  0 to (2*ten= r*= a* = A*sin (t)

#http://www.mathcurve.com/courbes2d/kappa/kappa.shtml  0 to (2*ten= r*= a* = A*cos (t)