Patent ID: 8806943

Claim:
An oscillation analyzer for a golf shaft assembly, the analyzer comprising: an oscillator having known oscillation properties including a first natural frequency when oscillating in a first deflection plane and a second natural frequency when oscillating in a second deflection plane; an oscillation of the golf shaft assembly and of the oscillator; an oscillation coupling means which can couple oscillation of the golf shaft assembly to that of the oscillator and in which the oscillation coupling increases as the oscillation frequency of the oscillator approaches the natural frequency of the golf shaft assembly; wherein the first natural frequency is farther from the natural frequency of the golf shaft assembly than the second natural frequency, thereby resulting in the coupling means being more effective for oscillator oscillation having the second natural frequency and the second deflection plane than for oscillator oscillation having the first natural frequency and first deflection plane; whereby the analyzer can provide information concerning the oscillation properties of the golf shaft assembly.