Abstract: A bimetallic golf club head having a weight body for lowering the center of gravity of the golf club head in order to increase vertical gear effect upon impact with a golf ball, while also providing for an isolation layer between the golf club head's weight body and a main body portion comprising a ball striking front section. One purpose of the isolation layer is to isolate, or reduce the combination of, the impact vibration frequency pattern of the main body and the vibration frequency pattern of the weight body, thereby preserving the desirable feel and playability of a single metal golf club head while enjoying the improved performance of a low center of gravity golf club head. Another purpose of the isolation layer is to minimize or reduce the galvanic/intermetallic reaction between two different metallic materials that are placed in direct contact.

Abstract: A golf club head having a face insert plate. The face insert plate is affixed to a faceplate mounting surface wherein a plurality of channels are formed. The channels preferably have a depth that is increased in a lower region of a face of the club head. An elastomeric binding material and damping agent is provided within the channels to affix the face insert plate to the face plate mounting surface and to provide a vibration damping function. In a preferred form, the faceplate mounting surface comprises a base wall of a face insert receiving cavity or recess that is formed within a main body of the club head.

Abstract: Exercise treadmills with stationary, forwardly placed supporting surface engaging foot means of fixed form and with rearwardly placed supporting surface engaging support means which are movable relative to the frame of the treadmill to change the angular relation of the frame and the treadmill tread belt relative to the supporting surface. The change in incline of the treadmill tread belt is by either electrical power means involving an extensible jack mechanism or by manually operable means including a gas cylinder with an extensible piston rod movable by gas flow within the cylinder which is in turn controlled by manually operable valve means. When gas can flow within the cylinder, change in incline of the treadmill tread belt is accomplished by the treadmill user moving relatively forwardly or rearwardly on the treadmill belt.