Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Cleaning or steam sterilizing
Reexamination Certificate
2011-04-12
2011-04-12
Fristoe, Jr., John K (Department: 3753)
Fluid handling
With cleaner, lubrication added to fluid or liquid sealing...
Cleaning or steam sterilizing
C137S243100, C251S077000
Reexamination Certificate
active
07921870
ABSTRACT:
A clutch mechanism for a slurry valve, wherein the slurry valve has a valve seat for seating a valve closure member carried on a valve stem, a drive member threadably engaged with the valve stem, the drive member being rotatable relative to the valve stem to axially move the valve stem and closure member relative to the valve seat to open and close the slurry valve, and a driving means for rotating the drive member, the clutch mechanism comprising: a clutch body having an internally threaded bore for threadably receiving the valve stem; and clamping means actuable with the clutch body for clamping the clutch body to the driving means so as to lock the valve stem and drive member together and allow them to rotate in unison to grind scale from the valve seat and valve closure member when they are positioned against each other.
REFERENCES:
patent: 2192452 (1940-03-01), Ostlind
patent: 4177825 (1979-12-01), Crawford
patent: 4338961 (1982-07-01), Karpenko
patent: 4460009 (1984-07-01), Nanci et al.
patent: 4465091 (1984-08-01), Keller
patent: 4627461 (1986-12-01), Gordon
patent: 7017882 (2006-03-01), Marsh et al.
patent: 2081844 (1982-02-01), None
patent: 01/36853 (2001-05-01), None
PCT International Search Report for International Application No. PCT/AU2006/000170, International Filing Date Feb. 9, 2006.
Delaney Paul
Hardie Nigel
Taylor Michael
Fristoe, Jr. John K
Tyco Flow Control Pacific Pty Ltd.
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