Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Reexamination Certificate
2006-05-16
2006-05-16
Jacyna, J. Casimer (Department: 3751)
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
C123S090140, C123S090650
Reexamination Certificate
active
07044433
ABSTRACT:
A valve spring mechanism is provided which is suitable for use with the inlet or exhaust valves of an internal combustion engine, and includes a valve head and a valve stem. The mechanism includes a piston/cylinder arrangement in which the cylinder surrounds a portion of the valve stem to define a chamber. The piston is slidable and sealingly mounted on the valve stem. The mechanism also has force transmitting means for transmitting the force produced on the piston by gas pressure within the chamber to the valve stem, and a spring operating on the piston and the stem of the valve for applying a force to the stem tending to close the valve in the event of failure of chamber gas pressure. The spring is positioned to maintain it in a compressed condition during normal operation of the mechanism as a result of gas pressure within the chamber.
REFERENCES:
patent: 3410304 (1968-11-01), Paul, Jr.
patent: 5713315 (1998-02-01), Jyoutaki et al.
patent: 5943988 (1999-08-01), Burger et al.
patent: 5988124 (1999-11-01), Duesmann
patent: 6508453 (2003-01-01), Mamyo
patent: 6866059 (2005-03-01), Griffin
patent: 29 49 413 (1981-06-01), None
patent: 38 08 542 (1988-10-01), None
patent: 41 32 891 (1993-04-01), None
patent: 42 14 839 (1993-11-01), None
patent: 196 01 308 (1997-07-01), None
Harrop Timothy
Langham Graham
Russell Rupert
Viccars Anthony
Ilmor Engineering Limited
Jacyna J. Casimer
Keusey, Tutunjian & & Bitetto, P.C.
LandOfFree
Valve spring mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Valve spring mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve spring mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3648230