Curve Driven Pattern
The Curve
Driven Pattern tool 
allows you to create patterns
along a planar or 3D curve. To define the pattern, you can use any sketch
segment, or the edge of a face (solid or surface), that lies along the
plane. You can base your pattern on an open curve, or on a closed curve,
such as a circle.
Like other pattern types, such
as linear
or circular,
you can skip pattern instances, and pattern in one or two directions.
To create a curve driven pattern:
Create
a part that includes a feature you want to pattern along a curve.
Click Curve Driven Pattern on
the Features toolbar, or click Insert,
Pattern/Mirror, Curve
Driven Pattern.
In the
PropertyManager,
set the options.
Click OK 
.