Patent ID: 11896856
Assignee: SCOTT TECHNOLOGIES, INC.
Field: Other consumer goods (Other fields)
Classification: CPC A  F | IPC A  F

Claim 12:
13. A compressed gas cylinder for a self-contained breathing apparatus, the cylinder including a pressure volume portion for containing a volume of gas pressurized to a service pressure of between about 5,000 psig and about 6,000 psig, the pressure volume portion having a length, a diameter, a wall thickness, and a water volume;
wherein the pressure volume portion defines an operational parameter of the cylinder, the operational parameter being a relationship between free air capacity of the cylinder in liters and a rated service time in minutes, the operational parameter comprising one of: 1200 liters of free gas and 30 minutes of rated service time; 1800 liters of free gas and 45 minutes of rated service time; 2400 liters of free gas and 60 minutes of rated service time; and 3000 liters of free gas and 75 minutes of rated service time;
wherein for the operational parameter comprising one of: 1200 liters of free gas and 30 minutes of rated service time, the wall thickness is about 0.322 inches; 1800 liters of free gas and 45 minutes of rated service time, the wall thickness is about 0.337 inches; 2400 liters of free gas and 60 minutes of rated service time, the wall thickness is about 0.362 inches; and 3000 liters of free gas and 75 minutes of rated service time, the wall thickness is about 0.398 inches; and
wherein for the operational parameter comprising one of: 1200 liters of free gas and 30 minutes of rated service time, the weight of the pressure volume portion is between about 5.7 pounds and about 6.6 pounds; 1800 liters of free gas and 45 minutes of rated service time, the weight of the pressure volume portion is between about 7.8 pounds and about 9.0 pounds; 2400 liters of free gas and 60 minutes of rated service time, the weight of the pressure volume portion is between 10.0 pounds and about 11.6 pounds; and 3000 liters of free gas and 75 minutes of rated service time, the weight of the pressure volume portion is about 12.5 pounds.