Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Post sintering operation
Reexamination Certificate
2005-05-31
2005-05-31
Jenkins, Daniel (Department: 1742)
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Post sintering operation
Reexamination Certificate
active
06899846
ABSTRACT:
A method of producing powder metal articles includes compacting and sintering powder metal to produce a shaped powder metal preform having at least one exposed surface to be surface densified which extends parallel to an axis of the preform between a free end and a blind end adjacent a transverse portion of the preform. The blind surface is cold worked by forcing a shaped densifying tool axially along the surface in a direction from the free end toward the blind end, and then reversing the direction of the tool toward the free end to densify a layer of the material at the exposed surface. In addition to the blind surface, the article can include one or more additional surfaces that can be densified in the same manner in a simultaneous operation.
REFERENCES:
patent: 175807 (1876-04-01), Wistar
patent: 2542912 (1951-02-01), Ensign
patent: 3258834 (1966-07-01), Rork
patent: 3553809 (1971-01-01), Yamada et al.
patent: 3694127 (1972-09-01), Takahashi et al.
patent: 3851512 (1974-12-01), Zhuravlev et al.
patent: 3874049 (1975-04-01), Ferguson
patent: 3951561 (1976-04-01), Speakman
patent: 4059879 (1977-11-01), Chmura et al.
patent: 4111031 (1978-09-01), Vennemeyer et al.
patent: 4128933 (1978-12-01), Walrave
patent: 4398407 (1983-08-01), DeFay, Jr.
patent: 4573841 (1986-03-01), Petkov et al.
patent: 4652926 (1987-03-01), Sasao et al.
patent: 4693864 (1987-09-01), Lloyd
patent: 4712411 (1987-12-01), Goodwin
patent: 4727744 (1988-03-01), Ferree
patent: 4771627 (1988-09-01), Speakman
patent: 4774749 (1988-10-01), Furumura
patent: 4940565 (1990-07-01), Müller
patent: 5009842 (1991-04-01), Hendrickson et al.
patent: 5069869 (1991-12-01), Nicolas et al.
patent: 5233738 (1993-08-01), Finkbeiner et al.
patent: 5325698 (1994-07-01), Nagpal et al.
patent: 5363714 (1994-11-01), Hoguchi
patent: 5368629 (1994-11-01), Kondo et al.
patent: 5390414 (1995-02-01), Lisowsky
patent: 5403544 (1995-04-01), Adrian et al.
patent: 5409662 (1995-04-01), Hirai
patent: 5453242 (1995-09-01), Knoess
patent: 5503506 (1996-04-01), Yuan
patent: 5540883 (1996-07-01), Jones et al.
patent: 5613180 (1997-03-01), Kosco
patent: 5659955 (1997-08-01), Plamper
patent: 5711187 (1998-01-01), Cole et al.
patent: 5945050 (1999-08-01), Jeong
patent: 5996229 (1999-12-01), Yang
patent: 6013225 (2000-01-01), Cadle et al.
patent: 6017489 (2000-01-01), Woolf et al.
patent: 6110419 (2000-08-01), Buckley-Golder et al.
patent: 6142004 (2000-11-01), Wier
patent: 6151941 (2000-11-01), Woolf et al.
patent: 6168754 (2001-01-01), Woolf et al.
Friedman Barry I.
Jenkins Daniel
Metz Lewis LLC
Sinterstahl Corp.-Powertrain
LandOfFree
Method of producing surface densified metal articles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of producing surface densified metal articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing surface densified metal articles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3451742