Karsten Manufacturing Corporation

Jeff A Blankenship

Randall B Noble

Eric V Cole

Marty R Jertson

Karsten D Solheim

The examples provided describe a golf club having a hollow rail member constructed to provide improved strength while reducing weight. The weight removed by using the hollow rail member may be redistributed to change club performance. Other embodiments may be described and claimed.

Golf club head having a hollow rail member

Embodiments of multiple flex shaft systems are disclosed herein. Other examples and related methods are also presented herein.

Multiple flex shaft method and system for golf clubs

Embodiments of methods, apparatus, and systems to identify address position of golf club heads are generally described herein. Other embodiments may be described and claimed.

Methods, apparatus, and systems to identify address position of golf club heads

In one embodiment, a golf club head includes a body and a restrictor mechanism coupled to a first portion of the body. The restrictor mechanism can have a base coupled to the first portion of the body, and a weight coupled to the base. The restrictor mechanism can be configured to (1) present a first resistance to a first deformation of the base in response to a rotational inertia of the weight relative to a rotation of the golf club head in a first direction, and (2) present a second resistance to a second deformation of the base in response to the rotational inertia of the weight relative to a rotation of the golf club head in a second direction opposite the first direction, where the first resistance is greater than the second resistance. Other examples and related methods are disclosed herein.

Golf clubs with variable moment of inertia and methods of manufacture thereof

In some embodiments, a golf club head has a body with a front section, a first restrictor of a restrictor mechanism coupled to a first portion of the body, and a weight having a first end coupled to the restrictor mechanism and to the body. The first restrictor has a first stiffness and is non-integral with the weight. Responsive to impact at a first zone of the front section, the first restrictor and the first end of the weight react towards each other, and the first stiffness can resist a deformation of the first restrictor by the first end of the weight. Responsive to impact at a second zone of the front section, the first restrictor and the first end of the weight react away from each other such that the first stiffness is substantially non-involved with first end of the weight. Other examples and related methods are also described herein.

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Phoenix, AZ, United States of America

Jeff A Blankenship