Positional fixing of a shaft

Details Positional fixing of a shaft Positional fixing of a shaft

2003-04-10

2008-05-27

King, Roy (Department: 1793)

Metal treatment

Stock

Ferrous

C123S090440, C384S587000

Reexamination Certificate

active

07377988

ABSTRACT:
The invention concerns the fixing of a bearing shaft (6) in a reception bore (1.3) of a housing, at least one end of the shaft being adapted to be swaged to the reception bore (1.3) for achieving at least one of a force locking and a positive engagement, and an outer peripheral surface of the shaft (6) having a hardness that is greater than a hardness of the ends (6.2) of the shaft. The novel shaft is carbonitrided, quenched and tempered so that at first a hardness of HV 745-950 (HRC 62-68) is realized, following which the thus treated shaft (6) is soft annealed to produce a hardness of HV 212-305 (HRB 93-HRC30), and the outer peripheral surface is then subjected to induction hardening to achieve a final hardness of HV 745-950 (HRC 62-68). The shaft of the invention has a long operating life even under high load conditions.

REFERENCES:
patent: 4816090 (1989-03-01), Doonan et al.
patent: 5054440 (1991-10-01), Kadokawa
patent: 6126897 (2000-10-01), Aihara et al.
patent: 6598571 (2003-07-01), Harimoto et al.
patent: 2002/0040743 (2002-04-01), Hirakawa et al.
patent: 2003/0037635 (2003-02-01), Tsuchiyama et al.
“fixing.” Webster's Online Dictionary. 2007. http://lionreference.chadwyck.com/initRefShelfSearch.do?initalise=true&listType=mwd (Jun. 7, 2007).
“fixing.” Dictionary.com. Lexico Publishing Group. Retrieved Jun. 7, 2007, from http://dictionary.reference.com/browse/fixing.

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