Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Reexamination Certificate
2006-02-14
2006-02-14
Chambers, A. Michael (Department: 3753)
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
C137S383000, C137S557000, C251S025000, C251S090000, C251S112000
Reexamination Certificate
active
06997209
ABSTRACT:
A locking device of an air-operated normally-closed valve for a gas cylinder includes a housing; a piston assembly provided in the housing; a tapered axial member having an annular outer tapered surface and positioned coaxially with the piston assembly axis; a lock nut which is screw-engaged with the housing and coaxial with the tapered axial member; an annular inner tapered surface formed on an inner peripheral surface of the lock nut to correspond to the annular outer tapered surface; an intermediate cylinder member positioned between the annular outer and inner tapered surfaces; and a lock piece inserted into a radial through hole and contacting the annular outer and inner tapered surfaces. The lock nut can press the lock piece against the annular outer tapered surface via the annular inner tapered surface to lock the piston assembly by adjusting the lock nut with respect to the housing.
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Chambers A. Michael
Fujikura Rubber Ltd.
McCormick Paulding & Huber LLP
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