Full mold casting process and device for a differential case...

Metal founding – Process – Shaping a forming surface

Reexamination Certificate

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C164S045000

Reexamination Certificate

active

06889742

ABSTRACT:
A peripheral flange formed on a differential case for mounting a ring gear and the peripheral flange is provided with a plurality of cast-in bolt holes for bolting up the ring gear to the differential case using the lost foam casting process for making the differential case. A method of making a gear case eliminates the process of machining of the bolt holes in the differential case casting, thus reducing cost of manufacturing the differential case.

REFERENCES:
patent: 4877078 (1989-10-01), Wittmoser
patent: 4907638 (1990-03-01), Hubbell et al.
patent: 5035276 (1991-07-01), Corbett et al.
patent: 5119882 (1992-06-01), Corbett
patent: 5121787 (1992-06-01), Corbett
patent: 5295413 (1994-03-01), Sherman
patent: 5755271 (1998-05-01), Williamson
patent: 6227333 (2001-05-01), Scheib et al.
patent: 6715536 (2004-04-01), Jensen

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