Valves and valve actuation – Mechanical movement actuator – Particularly packed or sealed
Reexamination Certificate
2011-07-05
2011-07-05
Bastianelli, John (Department: 3753)
Valves and valve actuation
Mechanical movement actuator
Particularly packed or sealed
C251S355000, C277S512000, C277S529000
Reexamination Certificate
active
07971854
ABSTRACT:
A replaceable valve shaft sealing system is disclosed that enables the operator to greatly reduce the maintenance needs of valves where rotational movement of a shaft, that is connected to the actual metering apparatus of the valve, actuates the opening or closing of the valve thereby regulating fluid flow. The design of the shaft enables the user to replace the valve stem and associated sealing rings or to re-lubricate the shaft, while the valve is connected to the line, by simply removing the packing nut. There are no-preloaded sealing devices that require re-construction. Prior art designs use O-rings to prevent the seepage of fluid into the valve body and though the rotating shaft, but the disclosed shaft prevents contamination of the lubrication into the fluid flow and eliminates any of the axial loads that can cause O-rings to fail using the prior art designs.
REFERENCES:
patent: 1502734 (1924-07-01), Trevillie
patent: 3204970 (1965-09-01), Dickinson
patent: 3284089 (1966-11-01), Wrenshall
patent: 4169604 (1979-10-01), Heathcott
patent: 4340204 (1982-07-01), Herd
patent: 4394023 (1983-07-01), Hinojosa
patent: 4451047 (1984-05-01), Herd et al.
patent: 4516752 (1985-05-01), Babbitt et al.
patent: 4530469 (1985-07-01), Muck
patent: 4540157 (1985-09-01), Kawanami
patent: 4566482 (1986-01-01), Stunkard
patent: 4570942 (1986-02-01), Diehl et al.
patent: 4587990 (1986-05-01), Pennell et al.
patent: 4637421 (1987-01-01), Stunkard
patent: 4944489 (1990-07-01), Adams et al.
patent: 5232200 (1993-08-01), Combeau
patent: 6202668 (2001-03-01), Maki
patent: 6725875 (2004-04-01), Mollard
Bastianelli John
Dallara Ken
Griswold Controls Inc
Law Office of Ken Dallara
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