Link and producing method of the same

Details Link and producing method of the same Link and producing method of the same

2005-08-25

2008-03-04

Stormer, Russell D. (Department: 3617)

Wheel substitutes for land vehicles

Tracks or treads

With guide means for interfitting with sprocket wheel or roller

C305S198000, C148S663000

Reexamination Certificate

active

07338138

ABSTRACT:
A link has link connecting bores (15) and (16) at both ends thereof and a wear rail (13) disposed between the upper portions of the link connecting bores (15) and (16). Portions near the ends of the wear rail (13) are designed to have a hardness smaller than that of a center portion of the wear rail. Accordingly, the portions near the ends of the wear rail can be abraded more easily than the center portion of the wear rail. Since the portions near the ends of the wear rail, in which the portions are easily abraded, are positioned closer to the link connecting bores, abrasion loss in use is smaller than that of the center portion owing to its structure. So, the difference in abrasion amount makes it possible to lower a level irregularity of the wear rail.

REFERENCES:
patent: 3955855 (1976-05-01), Massieon et al.
patent: 4419152 (1983-12-01), Grilli et al.
patent: 4813750 (1989-03-01), Erlenmaier et al.
patent: 5500058 (1996-03-01), Hirakawa et al.
patent: 5704697 (1998-01-01), Ketting et al.
patent: 7040080 (2006-05-01), Okawa et al.
patent: 2006/0017323 (2006-01-01), Wodrich et al.
patent: 2006/0181151 (2006-08-01), Wodrich et al.
patent: 2002-362441 (2002-12-01), None
patent: 2004-17782 (2004-01-01), None
Tomoyosi Morita et al., entitled “Practical Machine Series Bulldozer”, Nonpatent Literature 1, 1969, p. 70.

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