import cadquery as cq

r = 0.5 # Radius of the helix
p = 0.4 # Pitch of the helix - vertical distance between loops
h = 2.4 # Height of the helix - total height

# Helix
wire = cq.Wire.makeHelix(pitch=p, height=h, radius=r)
helix = cq.Workplane(obj=wire)

# Final result: A 2D shape swept along a helix.
result = (
    cq.Workplane('XZ') # helix is moving up the Z axis
    .center(r, 0) # offset isosceles trapezoid
    .polyline(((-.15,0.1), (0.0,0.05), (0,0.35), (-0.15,0.3)))
    .close() # make edges a wire
    .sweep(helix, isFrenet=True) # Frenet keeps orientation as expected
)

show_object(result)