Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Reexamination Certificate
2005-12-13
2005-12-13
Compton, Eric (Department: 3726)
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
C029S888040, C029S888042, C029S888044, C029S888050, C419S006000, C092S186000, C092S187000
Reexamination Certificate
active
06973723
ABSTRACT:
A piston includes a piston structure being unitarily formed in a powder metallurgy process, the piston structure having a crown assembly and a skirt assembly, at least a partial combustion chamber being formed intersecting a piston crown surface during the powder metallurgy process, the skirt assembly depending from the crown assembly and having two spaced apart pin bosses, each pin boss having a pin bore defined therein, a pair of opposed semi-circular skirt members, each skirt member extending outwardly from and being integrally joined to both of the pin bosses. The piston may be formed by executing a powder metallurgy process on at least two different metallic constituents to define a non-homogenous piston structure. A method of forming a piston is further included.
REFERENCES:
patent: 4419413 (1983-12-01), Ebihara
patent: 5972071 (1999-10-01), Koike et al.
patent: 6070323 (2000-06-01), Koike et al.
patent: 6279455 (2001-08-01), Kruse
patent: 6318243 (2001-11-01), Jones
patent: 6363608 (2002-04-01), Koike et al.
patent: 6435077 (2002-08-01), Damour et al.
patent: 6477941 (2002-11-01), Zhu et al.
patent: 6626576 (2003-09-01), Cadle et al.
patent: 6825450 (2004-11-01), Ribeiro et al.
patent: 3305879 (1984-08-01), None
patent: 4307560 (1994-09-01), None
patent: 2070068 (1981-09-01), None
patent: 06-330106 (1994-11-01), None
patent: 2001-335814 (2001-12-01), None
patent: 2002-130048 (2002-05-01), None
JPO Machine Translation of JP 06-330106, 1994. JPO.
Kemnitz et al; “Monotherm, a New Forged Steel Piston Design for Highly Loaded Diesel Engines,” SAE Technical Paper Series 2000-01-0924, Mar. 6-9, 2000.
Cagney John L.
Petrov Valeri B.
LandOfFree
Piston formed by powder metallurgical methods does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Piston formed by powder metallurgical methods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piston formed by powder metallurgical methods will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3497297