Pressure regulator for a respirator system
First Claim
1. A regulator assembly for use in a respirator system to supply a regulated flow of air to a respirator head piece;
- the assembly comprising;
a housing that comprises (a) an air inlet port for connection to a source of air at comparatively high pressure, and (b) an air outlet port for connection to the respirator head piece;
the housing having an air flow path between the air inlet port and the air outlet port, the housing containing (1) an air pressure-reduction stage in communication with the inlet port, and (ii) a noise-reduction stage located in the air flow path within the housing between the pressure-reduction stage and the outlet port;
wherein the noise-reduction stage comprises first and second noise-reduction members spaced apart from each other along the air flow path, the first noise-reduction member being positioned adjacent the air outlet of the pressure-reduction stage, and including a deflector member arranged to deflect the air flow from the pressure-reduction stage through the first noise-reduction member and thereby diffuse the air flow before it reaches the second noise-reduction member.
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Accused Products
Abstract
A regulator assembly is provided for use in a respirator system to supply a regulated flow of air to a respirator head piece. The respirator assembly comprises a housing (15) having an air inlet port (17) for connection to a source of air at comparatively high pressure, and an air outlet port (23) for connection to the respirator head piece. The housing (15) contains an air pressure-reduction stage (19) in communication with the inlet port (17), and a noise-reduction stage (21) between the pressure-reduction stage and the outlet port (23). The noise reduction stage (21) comprises two, spaced, muffler discs (41, 43) the first of which is positioned adjacent the air outlet (39) of the pressure-reduction stage (19). A deflector plate (47) deflects the airflow from the pressure-reduction stage (19) through the first muffler disc (41), and thereby diffuses the air flow before it reaches the second muffler disc (43).
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Citations
9 Claims
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1. A regulator assembly for use in a respirator system to supply a regulated flow of air to a respirator head piece;
- the assembly comprising;
a housing that comprises (a) an air inlet port for connection to a source of air at comparatively high pressure, and (b) an air outlet port for connection to the respirator head piece;
the housing having an air flow path between the air inlet port and the air outlet port, the housing containing (1) an air pressure-reduction stage in communication with the inlet port, and (ii) a noise-reduction stage located in the air flow path within the housing between the pressure-reduction stage and the outlet port;
wherein the noise-reduction stage comprises first and second noise-reduction members spaced apart from each other along the air flow path, the first noise-reduction member being positioned adjacent the air outlet of the pressure-reduction stage, and including a deflector member arranged to deflect the air flow from the pressure-reduction stage through the first noise-reduction member and thereby diffuse the air flow before it reaches the second noise-reduction member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- the assembly comprising;
Specification