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US 10,167,969 B1Granted
Pressure relief valve for railroad tank cars
AssigneeEngineered Controls International, LLC
InventorAaron Dominic Wyatt
Life of this patent
Estimating the term…
Abstract
A relief valve configured to allow content held within a vessel to be release under pressure is disclosed. The relief valve is configured to expose a release outlet when pressure within the vessel exceeds a release pressure, and the relief valve is further configured to maintain exposure of the release outlet after pressure within the vessel falls below the release pressure.
Claims20
A relief valve comprising:
- a flange mount;
- a bonnet engaged with the flange mount;
- an adjusting screw engaged with the bonnet;
- a spring assembly engaged with the adjusting screw;
- a seat engaged with the spring assembly, the seat being urged by the spring assembly to engage with the flange mount in a closed position;
- a stem extending into the spring assembly and extending through the adjusting screw, the stem comprising a shoulder, the shoulder being disposed along the stem external to the bonnet;
- a pin housing engaged with the bonnet;
- and
- at least one pin disposed in the pin housing and configured to engage the shoulder when the stem is in an open position.
6 more elements
A relief valve comprising:
- a flange mount;
- a bonnet engaged with the flange mount;
- an adjusting screw engaged with the bonnet;
- a spring assembly engaged with the adjusting screw;
- a seat engaged with the spring assembly, the seat being urged by the spring assembly to engage with the flange mount in a closed position;
- a stem extending into the spring assembly and extending through the adjusting screw, the stem comprising a shoulder;
- a pin housing engaged with the bonnet;
- at least one pin disposed in the pin housing and configured to engage the shoulder when the stem is in an open position;
- and
- a poppet engaged to the spring assembly, and wherein the spring assembly comprises a spring retainer threadably engaged with the adjusting screw and at least one spring between the spring retainer and the poppet.
7 more elements
A relief valve comprising:
- a flange mount;
- a bonnet engaged with the flange mount;
- an adjusting screw engaged with the bonnet;
- a spring assembly engaged with the adjusting screw;
- a seat engaged with the spring assembly, the seat being urged by the spring assembly to engage with the flange mount in a closed position;
- a stem extending into the spring assembly and extending through the adjusting screw, the stem comprising a shoulder and a head portion;
- a pin housing engaged with the bonnet;
- and
- a first pin and a second pin disposed in the pin housing and configured to engage the shoulder when the stem is in an open position, wherein the first pin and the second pin each engage the head portion when the stem is in the closed position.
6 more elements
A relief valve comprising:
- a pin housing;
- a stem comprising a head portion and a shoulder;
- at least one pin slidably engaged with and extending through the pin housing and a pin spring coupled to the at least one pin and to the pin housing to urge the at least one pin toward the stem, wherein the at least one pin engages the head portion when the stem is in a closed position and engages the shoulder when the stem is in an open position;
- a stop engaged with the at least one pin;
- a reset plate captured on the at least one pin between the pin housing and the stop;
- and
- a rod extending through the reset plate.
4 more elements
A relief valve comprising:
- a bonnet and a flange mount engaged with the bonnet;
- an adjusting screw engaged with the bonnet;
- a spring retainer engaged with the adjusting screw, and a spring engaged with the spring retainer;
- a poppet engaged with the spring;
- a seat engaged with the poppet, the seat urged by the spring to engage the flange mount in a closed position;
- a support member engaged with the flange mount;
- a poppet stem slidably engaged with the support member and engaged with the poppet;
- a stem engaged with the poppet and extending through the adjusting screw;
- a pin housing engaged with the bonnet;
- and
- at least one pin disposed in the pin housing to retain the stem in an open position.
8 more elements
Dependencies are inferred from the claim text.