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US 2026/0235144 A1Published application
Dual-wall cylinder for fluid control device actuator
OwnerMichel K. Lovellinventor
Life of this patent
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Abstract
A fluid control device can include an actuator with a first cylinder defining a maximum differential pressure for the actuator, a second cylinder circumferentially surrounding the first cylinder, the second cylinder defining a maximum rated pressure for the actuator, and a piston arranged within the first cylinder to translate within the first cylinder in response to pressure in the first cylinder and the second cylinder to control operation of the fluid control device.
Claims23
An actuator for a fluid control device, the actuator comprising:
- a cylinder assembly, including:
- an inner cylinder;
- an outer cylinder, the outer cylinder circumferentially surrounding the inner cylinder to form a radial gap therebetween;
- a first endcap secured to a first end of the cylinder assembly, to close a first end of the inner cylinder and a first end of the outer cylinder;
- a second endcap secured to a second end of the cylinder assembly, opposite the first end of the cylinder assembly, to close a second end of the inner cylinder and a second end the outer cylinder;
- and
- a piston arranged within the inner cylinder, the piston being translatable within the inner cylinder in response to pressure differences across the piston, within the inner cylinder, to actuate the fluid control device.
4 more elements
A method of operating a fluid control device, the method comprising:
- controlling a flow of driving fluid in an actuator that includes a cylinder assembly having a first cylinder and a second cylinder, the second cylinder circumferentially surrounding the first cylinder to form a gap between the first cylinder and the second cylinder, to selectively:
- move a piston within the first cylinder in a first direction by directing the flow of driving fluid through the gap between the first cylinder and the second cylinder and into an interior volume of the first cylinder on a first side of the piston;
- and
- move the piston within the first cylinder in a second direction by directing the flow of driving fluid into an interior volume of the first cylinder on a second side of the piston.
1 more element
A valve, comprising:
- a valve actuator, including:
- a first cylinder defining a maximum differential pressure for the valve actuator;
- a second cylinder circumferentially surrounding the first cylinder, the second cylinder defining a maximum rated pressure for the valve actuator;
- and
- a piston arranged within the first cylinder to translate within the first cylinder in response to pressure in the first cylinder and the second cylinder to control operation of the valve.
2 more elements
Dependencies are inferred from the claim text.