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US 7,069,948 B2Granted
Valve travel indicator
AssigneeFisher Controls International LLC
InventorMichel Ken Lovell
Life of this patent
Estimating the term…
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.
Claims12
A valve travel indicator comprising:
- an indicator portion operable to indicate a location on a valve indicator scale;
- and
- a retaining portion fixedly coupled to the indicator portion and movably coupled to a valve stem, the retaining portion operable to fixedly couple the indicator portion to the valve stem during movement of the valve stem and movably couple the indicator portion to the valve stem in response to a predetermined force level exerted upon the indicator portion, wherein the retaining portion comprises an o-ring.
A valve travel indicator comprising:
- an indicator portion operable to indicate a location on a valve indicator scale and comprising a cavity;
- wherein the indicator portion comprises an outer diameter of 1.5 inches, an inner diameter of 0.8 inches, and is formed from ultraviolet stabilized acrylonitrile styrene acrylate;
- wherein the indicator portion tapers from 0.21 inches in height to 0.06 inches in height;
- wherein the cavity comprises an outer diameter of 0.673 inches, an inner diameter of 0.5 inches and a height of 0.135 inches;
- an o-ring fixedly disposed within the cavity and movably coupled to a valve stem, the o-ring operable to fixedly couple the indicator portion to the valve stem during movement of the valve stem and movably couple the indicator portion to the valve stem in response to a predetermined force level exerted upon the indicator portion;
- wherein the o-ring comprises an inner diameter of 0.5 inches, an outer diameter of 0.6875 inches, a cross-sectional diameter of 0.09375 inches and is formed from 70 durometer-shore A nitrile;
- and
- wherein the predetermined force level comprises from 4 pounds of pressure to 25 pounds of pressure.
5 more elements
A valve travel indicator comprising:
- an indicator portion operable to indicate a location on a valve indicator scale;
- and
- a retaining portion fixedly coupled to the indicator portion and movably coupled to a valve stem, the retaining portion operable to fixedly couple the indicator portion to the valve stem during movement of the valve stem and movably couple the indicator portion to the valve stem for movement in a longitudinal direction along the valve stem in response to a predetermined force exerted upon the indicator portion,
- wherein the indicator portion further comprises a cavity and wherein the retaining portion is disposed within the cavity.
1 more element
Dependencies are inferred from the claim text.