Universal pressure reducer for self-contained breathing apparatus
First Claim
1. A universal pressure reducer for a self-contained breathing apparatus, comprising:
- an inlet;
a reducer module in fluid communication with the inlet;
a pneumatic alarm mechanism; and
a pneumatic transfer valve assembly that controls the actuation of the alarm mechanism by controlling the flow of pressurized air thereto, wherein the transfer valve assembly is arranged to actuate the alarm mechanism when the pressure of air entering the reducer through the inlet drops to a trigger level that is automatically selected from at least a first predetermined level and a second predetermined level, the trigger level being set to the first predetermined level if the inlet is coupled to a cylinder valve connected to a pressure vessel of a first rated capacity, and being set to the second predetermined level if the inlet is coupled to a cylinder valve connected to the pressure vessel of a second rated capacity, the first and second rated capacities being different from one another and the first and second predetermined levels being different from one another.
0 Assignments
0 Petitions
Accused Products
Abstract
A universal pressure reducer is provided for a self-contained breathing apparatus. The universal pressure reducer includes an inlet, a reducer module in fluid communication with the inlet, a pneumatic alarm mechanism, and a pneumatic transfer valve assembly that controls the actuation of the alarm mechanism by controlling the flow of pressurized air thereto. The transfer valve assembly is arranged to actuate the alarm mechanism when the pressure of air entering the reducer through the inlet drops to a predetermined trigger level. The predetermined trigger level is automatically selected based on a rated capacity of a pressure vessel to which the inlet is connected through a cylinder valve.
15 Citations
20 Claims
-
1. A universal pressure reducer for a self-contained breathing apparatus, comprising:
-
an inlet; a reducer module in fluid communication with the inlet; a pneumatic alarm mechanism; and a pneumatic transfer valve assembly that controls the actuation of the alarm mechanism by controlling the flow of pressurized air thereto, wherein the transfer valve assembly is arranged to actuate the alarm mechanism when the pressure of air entering the reducer through the inlet drops to a trigger level that is automatically selected from at least a first predetermined level and a second predetermined level, the trigger level being set to the first predetermined level if the inlet is coupled to a cylinder valve connected to a pressure vessel of a first rated capacity, and being set to the second predetermined level if the inlet is coupled to a cylinder valve connected to the pressure vessel of a second rated capacity, the first and second rated capacities being different from one another and the first and second predetermined levels being different from one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A self-contained breathing apparatus, comprising:
-
a cylinder valve; and a universal pressure reducer, comprising; an inlet coupling the universal pressure reducer to the cylinder valve; a reducer module in fluid communication with the inlet; a pneumatic alarm mechanism; and a pneumatic transfer valve assembly that controls the actuation of the alarm mechanism by controlling the flow of pressurized air thereto, wherein the transfer valve assembly is arranged to actuate the alarm mechanism when the pressure of air entering the reducer through the inlet drops to a predetermined trigger level, the predetermined trigger level being automatically selected based on a rated capacity of a pressure vessel to which the cylinder valve is connected. - View Dependent Claims (18, 19, 20)
-
Specification