DIFFERENTIAL PRESSURE GAUGE
First Claim
1. A differential pressure gauge comprising:
- a hollow cylinder;
a first housing member disposed at a first end of the hollow cylinder;
a second housing member disposed at a second end of the hollow cylinder;
a piston having a first end and a second end, wherein the piston is slidably disposed in the first housing member; and
a remote indicator coupled to the second end of the piston, wherein at least a portion of the remote indicator extends into the hollow cylinder and provides a visual indication of a pressure difference between the first end and the second end of the piston.
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Accused Products
Abstract
A pressure gauge including a hollow cylinder, a first housing member having a first pressure inlet disposed at a first end of the cylinder, and a second housing member having a second pressure inlet disposed at a second end of the cylinder. The pressure gauge also includes a piston slidably disposed in the first housing member. The piston includes a remote indicator coupled to an end of the piston. At least a portion of the remote indicator extends into the hollow cylinder. A spring is disposed in the cylinder abutting the remote indicator and urges the remote indicator toward the second housing member. An increased pressure difference between the first pressure inlet and the second pressure inlet causes the remote indicator to move away from the second housing member and toward the first housing member, and the remote indicator provides a measure of the pressure difference relative to indicia included on the pressure gauge.
19 Citations
20 Claims
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1. A differential pressure gauge comprising:
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a hollow cylinder; a first housing member disposed at a first end of the hollow cylinder; a second housing member disposed at a second end of the hollow cylinder; a piston having a first end and a second end, wherein the piston is slidably disposed in the first housing member; and a remote indicator coupled to the second end of the piston, wherein at least a portion of the remote indicator extends into the hollow cylinder and provides a visual indication of a pressure difference between the first end and the second end of the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A differential pressure gauge comprising:
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a hollow cylinder including at least a portion of which is one of transparent and translucent; a first housing member disposed at a first end of the hollow cylinder; a second housing member disposed at a second end of the hollow cylinder; a piston having a first end and a second end, wherein the piston is slidably disposed in the first housing member; and a remote indicator coupled to the second end of the piston, wherein at least a portion of the remote indicator extends into the hollow cylinder adjacent the portion of the cylinder that is one of transparent and translucent and provides a visual indication of a pressure difference between the first end and the second end of the piston by comparing a position of the remote indicator relative to indicia located at least one of overlapping and adjacent the portion of the cylinder that is one of transparent and translucent. - View Dependent Claims (14, 15, 16, 17)
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18. A differential pressure gauge comprising:
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a hollow cylinder; a first housing member disposed at a first end of the cylinder, the first housing member having a first pressure inlet in fluid communication with a first source of a pressurized fluid; a second housing member disposed at a second end of the cylinder, the second housing member having a second pressure inlet in fluid communication with a second source of a pressurized fluid having a higher pressure than the first source of a pressurized fluid; a piston having a first end in fluid communication with the first pressure inlet and a second end in fluid communication with the second pressure inlet, wherein the piston is slidably disposed in the first housing member; a remote indicator coupled to the second end of the piston, at least a portion of the remote indicator having a visual indicator extending into the hollow cylinder; and a spring configured to urge the remote indicator in a direction toward the second housing member and away from the first housing member; wherein an increased pressure difference between the first pressure inlet and the second pressure inlet causes the remote indicator to move in a direction away from the second housing member and toward the first housing member, the remote indicator providing a measure of the pressure difference between the first end and the second end of the piston. - View Dependent Claims (19, 20)
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Specification