초록 ▼

A quick release mig gun tip comprises a contact tip having an exterior frusto-conical surface and external threads, and a gas diffuser having an internal frusto-conical surface and internal threads. The threads are preferably stub acme threads. The contact tip is assembled to the gas diffuser by eng

A quick release mig gun tip comprises a contact tip having an exterior frusto-conical surface and external threads, and a gas diffuser having an internal frusto-conical surface and internal threads. The threads are preferably stub acme threads. The contact tip is assembled to the gas diffuser by engaging their threads until the frusto-conical surfaces mate. Large currents can be conducted through the frusto-conical surfaces and the threads without causing excessive resistance heating. The contact tip threads are designed so that assembly and release of the contact tip requires only one turn relative to the gas diffuser.

대표청구항 ▼

[ I claim:] [5.] A mig wire welding gun comprising:a handle;a gas diffuser joined to said handle and defining an internal frusto-conical surface having an apex end and a base ends an internal thread, and a non-threaded transitional region interposed between said frusto-conical surface base end and s

[ I claim:] [5.] A mig wire welding gun comprising:a handle;a gas diffuser joined to said handle and defining an internal frusto-conical surface having an apex end and a base ends an internal thread, and a non-threaded transitional region interposed between said frusto-conical surface base end and said internal thread; anda contact tip assembled to the gas diffuser and defining an external frusto-conical surface, having an apex end and a base ends mating with said internal frusto-conical surface of said gas diffuser for establishing surface-to-surface electrical contact with said internal frusto-conical surface of said gas diffuser, an external thread engaging said internal thread of said gas diffuser, and a non-threaded transitional region interposed between said base end of said external frusto-conical surface and said external thread.