Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Reexamination Certificate
2007-03-06
2007-03-06
Rivell, John (Department: 3753)
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
C116S277000
Reexamination Certificate
active
10423457
ABSTRACT:
A valve travel indicator is described. An indicator portion indicates a location on a valve indicator scale. A retaining portion is fixedly coupled to the indicator portion and movably coupled to a valve stem. The retaining portion fixedly couples the indicator portion to the valve stem during movement of the valve stem and movably couples the indicator portion to the valve stem in response to a predetermined force level exerted upon the indicator portion.
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“Type 357 Control Valve” Emerson Process Management Product Bulletin, 51.2:357 May 2002, © Fisher Controls International, Inc. 1991, 2002 (15 pages).
“Design D and DA Valves” Fisher-Rosemount Instruction Manual, Form 1777, May 2001, © Fisher Controls International, Inc. 1991, 2002 (11 pages).
U.S. Appl. No. 10/353,641, entitled “Valve Travel Indicator,” filed Jan. 29, 2003.
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Fisher Controls International LLC.
Marshall & Gerstein & Borun LLP
Rivell John
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