Valves and valve actuation – Rotary valves – Butterfly
Reexamination Certificate
2006-02-14
2006-02-14
Jacyna, J. Casimer (Department: 3751)
Valves and valve actuation
Rotary valves
Butterfly
C123S361000, C123S399000
Reexamination Certificate
active
06997438
ABSTRACT:
An electronically controlled butterfly valve comprising a valve body, a valve seat formed in the valve body, a butterfly disc adapted to engage the valve seat, a shaft on which the butterfly disc is keyed, an electric motor coupled to the shaft by means of a gear transmission having a final gear keyed on the shaft, a spiral return spring adapted to rotate the butterfly disc towards the closed position, and an opposing spring adapted to rotate the butterfly disc towards a limp-home position defined by an abutment body against the action of the return spring; the opposing spring is a flat leaf spring and is mounted on a moving member which is mounted coaxially and idly on the shaft and has a projection adapted to engage in abutment against the abutment body, an end of the opposing spring being free and ending in a projection which is disposed so as to be superimposed on the trajectory followed by a member rigid with the final gear.
REFERENCES:
patent: 6244565 (2001-06-01), McDonnell et al.
patent: 6286481 (2001-09-01), Bos et al.
patent: 6390062 (2002-05-01), Saito et al.
patent: 2002/0129791 (2002-09-01), Saito et al.
patent: 2003/0066515 (2003-04-01), Saito et al.
patent: 2003/0196640 (2003-10-01), Saito et al.
patent: 202 11 815 (2003-01-01), None
patent: 1 024 271 (2000-08-01), None
patent: WO00/68556 (2000-11-01), None
Search Report for European Application No. EP 04 10 4444 (Dec. 8, 2004).
Howrey LLP
Jacyna J. Casimer
Magneti Marelli Powertrain S.p.A.
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