Valves and valve actuation – Biased valve – Springs and spring retainers
Reexamination Certificate
2005-11-22
2005-11-22
Jacyna, J. Casimer (Department: 3751)
Valves and valve actuation
Biased valve
Springs and spring retainers
C251S368000, C123S090670, C123S188120
Reexamination Certificate
active
06966539
ABSTRACT:
A lightweight valve spring retainer with a wear resistant spring seat or seats is provided. The spring seats may be defined in part by a tungsten carbide layer.
REFERENCES:
patent: 5116430 (1992-05-01), Hirai et al.
patent: 5281484 (1994-01-01), Tank et al.
patent: 5901728 (1999-05-01), Hara et al.
patent: 6004372 (1999-12-01), Quets
patent: 08100228 (1996-04-01), None
patent: 10317926 (1998-12-01), None
Jacyna J. Casimer
Orchid Orthopedic Solutions, LLC
Thompson Hine LLP
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