Karsten Manufacturing Corporation

Calvin S Wang

Xiaojian Chen

John A Solheim

Anthony D Serrano

Martin R Jertson

Eric Joel Morales

David A Higdon

Les J Bryant

Matthew T Schier

Alex G Woodward

Ryan H Davis

Described herein is a hollow body iron-type golf club head having a sole and ballast configured to relieve stress within a forward portion of the sole. In a first configuration, the golf club head comprises a ballast undercut for relieving stress. In other configurations, the ballast undercut is combined with additional stress relief features, such as a cascading sole near the face sole juncture, for further reductions to face thickness.

Golf club heads with internal undercuts

Putter type club head with vertical groove patterns are described herein. A putter type club head comprises a putter face having a plurality of first curved grooves and a plurality of second curved grooves. The first curved grooves and the second curved grooves intersect each other at a plurality of points across the putter face. The width and depth of the first curved grooves and the second curved grooves can vary across the putter face in a direction extending from a heel end to a toe end, and/or in a direction extending from a top rail to a sole. The curved groove pattern provides consistent ball speed performance for any impact location on the putter face.

Grooves of golf club heads and methods to manufacture grooves of golf club heads

Golf club head

Growing community of inventors

Taichung, Taiwan

Calvin S Wang