Golf swing analysis and method of custom trimming golf club shafts
September 16, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAthletic swing measurement system and method Method of making golf club shafts Golf club shafts with matched frequencies of vibration Computing golf trainer with magnetic sensor Compact golf swing training and practice device Golf club with swing speed indicator Swing velocity indicator Golf swing evaluation system Matched sets for golf clubs having maximum effective moment of inertia Method of matching golfer to golf club InventorApplicationNo. 307917 filed on 09/16/1994US Classes:473/289, Particular correlated shaft flexural characteristic473/318Including nonmetallic material or vibratory wave modifying featureExaminersPrimary: Marlo, George J.Attorney, Agent or FirmInternational ClassesA63B 053/10A63B 053/12 AbstractA method of custom trimming golf club shafts comprising (i) measuring the frequency of oscillation, fc, of a representative shaft at a plurality of different tipping amounts and effective shaft lengths, (ii) calculating the moment, mc, of the replica shaft for each effective shaft length, (iii) performing a linear regression on the measured frequencies to obtain the coefficients A and B in the formfc =A+C*tipping amount+B*mc,(iv) selecting an inventory shaft having a known natural frequency, fc, at a selected moment, mc, and (v) calculating the constant C=fc -B*mc. The tipping amount is calculated from the equationtipping amount=(fg -C-B*mg)÷Awhere mg is the desired moment and fg is the desired natural frequency of a golfer's finished golf club. A length of the narrow end of the inventory shaft equal to the tipping amount is removed and a length of the grip end of the inventory shaft may also be removed if necessary. | |
