Patent ID: 6029269
Filing Date: 2000-02-29
Classification: A42C,B21D,F41H,Y10S,Y10T

Abstract:
A process for forming a ballistic resistant helmet, comprising the steps of:a) pre-machining a titanium-based alloy preform, comprising:i) a central region which is relatively thick;ii) a central tapering region about said central region;iii) a near periphery region about said central tapering region, said near periphery region being relatively thin;iv) a peripheral tapering region about said near periphery region; andv) a periphery region about said peripheral tapering region, being relatively thick;b) mounting said premachined preform to a female tool assembly having a desired helmet shape and mechanically pressing said preform to provide a desired sealing; andc) superplastically forming said premachined preform to a final helmet shape.