The ornamental design for a pinfintypeheatsink, as shown and described.
1., 3. Pin fintype heat sink
1.1 : Front
1.2 : Back
1.3 : Right
1.4 : Left
1.5 : Top
1.6 : Bottom
1.7 : Enlarged cross-sectional
1.8 : Partially enlarged
3.1 : Front
3.2 : Back
3.3 : Right
3.4 : Left
3.5 : Top
3.6 : Bottom
3.7 : Enlarged cross-sectional
3.8 : Partially enlarged 1. The parts shown by means of broken lines in the reproductions are not part of the claimed designs; reproduction 1.7 is an enlarged cross-sectional view of a fin at the lower right of the top view 1.5 sectioned horizontally at half the height of the fin; reproduction 1.8 is a partially enlarged view showing a fin at the lower right of the top view 1.5 seen from the front.; 3. The parts shown by means of broken lines in the reproductions are not part of the claimed designs; reproduction 3.7 is an enlarged cross-sectional view of a fin at the lower right of the top view 3.5 sectioned horizontally at half the height of the fin; reproduction 3.8 is a partially enlarged view showing a fin at the lower right of the top view 3.5 seen from the front.