Contoured back surface of golf club face

A method of designing a contoured golf club face comprising the step of assigning a thickness to each area of the face according to a magnitude of internal load expected to be experienced by each area when a force is exerted against a ball-hitting surface of the face at a given location wherein the assigned thickness is larger in those areas of the face which are expected to experience higher magnitude internal load when the force is exerted against the ball-hitting surface of the face and the assigned thickness is smaller in those areas of the face which are expected to experience lower magnitude internal load when the force is exerted against the ball-hitting surface.

A method of designing a golf club face comprising

• determining regions of a golf club face in which magnitudes of internal load are similar when subjected to at least one ball impact force at a given location,
• decreasing the thickness of those regions which experience relatively lower magnitude internal loads and
• increasing the thickness of those regions which experience relatively higher magnitude internal loads such that regions which experience similar magnitudes of internal loads have similar thicknesses to result in a golf club face in which the stress is approximately uniform when the face is subjected to at least one ball impact force at a location similar to said given location, and wherein the thicknesses between regions are stepped.

A method of designing a golf club face comprising determining magnitudes of internal loads experienced by various regions of the face when the face is subjected to at least one ball impact force at a first location and assigning similar thickness of material to areas which experience a similar magnitude of internal load such that those regions experiencing a lower magnitude of internal load are thinner than those regions experiencing a higher magnitude of internal load wherein the regions of differing thicknesses are stepped to result in a golf club face in which the internal load is approximately uniformly distributed when the face is subjected to a ball impact force at a second location which is at least similar to said first location.

A golf club face comprising

• a ball-hitting surface, and
• a back surface which is opposite the ball hitting surface,
• wherein the back surface is contoured to give the face two or more thicknesses, wherein regions which experience a similar magnitude of internal load upon a force being placed on the ball-hitting surface have similar thicknesses, and wherein the back surface is stepped between regions of differing thickness.

A golf club face comprising

• a ball-hitting surface, and
• a back surface which is opposite the ball-hitting surface, wherein the back surface is contoured to give the face two or more thicknesses, wherein regions of the face which experience a similar magnitude of internal load upon a force being applied to the ball-hitting surface have similar thicknesses, and wherein the back surface is smoothly contoured between regions of differing thickness.