US 11,725,253 B2
Localized heat treatment
Dave Wu, TaiPei (TW); Tyler Shaw, Paradise Valley, AZ (US); Matthew W. Simone, Phoenix, AZ (US); and Yujen Huang, PingTung (TW)
Assigned to Karsten Manufacturing Corporation, Phoenix, AZ (US)
Filed by KARSTEN MANUFACTURING CORPORATION, Phoenix, AZ (US)
Filed on Dec. 22, 2021, as Appl. No. 17/645,492.
Application 17/645,492 is a continuation of application No. 15/680,958, filed on Aug. 18, 2017, granted, now 11,208,701.
Claims priority of provisional application 62/376,836, filed on Aug. 18, 2016.
Prior Publication US 2022/0112570 A1, Apr. 14, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C21D 9/00 (2006.01); A63B 53/02 (2015.01); A63B 53/04 (2015.01); C21D 1/42 (2006.01)
CPC C21D 9/0068 (2013.01) [A63B 53/02 (2013.01); A63B 53/047 (2013.01); C21D 1/42 (2013.01); A63B 53/0466 (2013.01); A63B 53/0487 (2013.01); A63B 2053/0479 (2013.01); C21D 2221/00 (2013.01); Y02P 10/25 (2015.11)] 16 Claims
OG exemplary drawing
 
1. A method for heat treating a golf club comprising:
casting a golf club head configured to undergo a heat treatment comprising an apparatus;
wherein the apparatus defines a first heating unit at a first position and a second heating unit at a second position adjacent the first position, a conveyor belt, a hosel positioning device, and a heat sink;
placing the golf club head in the first heating unit, wherein the first heating unit is an induction heater comprising a first localized heating area;
positioning the golf club head using a hosel positions device that is coupled to a conveyor belt, such that a hosel of the golf club head is located inside the first localized heating area within a coiled tube and a body of the golf club head is located outside of the first localized heating area of the induction heater;
heating the hosel using the coiled tube comprising a first end and a second end coupled to a power supply within the first localized heating area of the induction heater for approximately 10 minutes;
removing the golf club head from the induction heater;
transferring the hosel positioning device immediately by means of a conveyor belt from the first heating unit at the first position to a second localized heating area at the second position;
moving the golf club head to the second heating unit by means of the conveyor belt, wherein the second heating unit is a resistive heater comprising the second localized heating area;
positioning the golf club head using the hosel positioning device such that the hosel of the golf club head is located within the second localized heating area of the resistive heater and the body of the golf club head is located outside the second localized heating area;
heating the hosel within the second localized heating area of the resistive heater for approximately 10 minutes; and
removing the golf club head from the resistive heater.