Tool assembly heat treatment method

Details Tool assembly heat treatment method Tool assembly heat treatment method

2008-02-27

2009-10-27

Kerns, Kevin P (Department: 1793)

Metal fusion bonding

Process

Plural heat applying

C076SDIG008, C076S101100, C148S519000, C148S521000, C148S528000, C029S525140, C029S428000

Reexamination Certificate

active

07607562

ABSTRACT:
A method of welding connection is directed towards the construction and subsequent heat treatment of industrial grade manual tools and, specifically, their tool heads to handles or handle attachment connections. The method employs the use of matching, non-heat treated, compatible material such as steel alloys, for the tool heads and steel handles or attachment sockets. These components are welded together prior to their heat treatment, resulting in a superior weld joint without the normal annealing which occurs during welding. Such tools are, as a result, extremely resistant to bending or breaking under normal usage. With regard to spades and shovels, a stronger blade-to-handle junction is created, as no annealing takes place, compared to blades and handles which are first heat treated separately then welded together.

REFERENCES:
patent: 2065898 (1936-12-01), Kreag
patent: 2290552 (1942-07-01), Gier, Jr.

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