Pressure Regulator Assembly and Bypass Assembly for a Self-Contained Breathing Apparatus
AssigneeMSA (Suzhou) Safety Equipment R&D Co., Ltd.
InventorsLongteng Yu, Lida Zhu, Carsten Christian Leuschner, Wolfgang Heinz Adolf Kirchner
Life of this patent
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Abstract
A pressure regulator assembly for an SCBA including a valve assembly having a piston, a cylinder configured to receive the piston, a sealing member configured for engagement by the piston, a conduit extending through the piston and facilitating fluid communication between an inlet chamber and a cavity of the cylinder, and a driving assembly configured to facilitate the engagement and disengagement of the piston responsive to a change of pressure in the outlet chamber. A bypass assembly for an SCBA is also disclosed.
Claims21
A pressure regulator assembly, comprising:
- a housing defining an inlet chamber in fluid communication with an outlet chamber;
- a valve assembly positioned between the inlet chamber and the outlet chamber, the valve assembly comprising:
- (i) a piston having a body with a first end and a second end;
- (ii) a cylinder configured to receive the second end of the piston and defining a cavity between an end of the cylinder and the second end of the piston;
- (iii) a sealing member configured for engagement by the first end of the piston, wherein, when the first end of the piston engages the sealing member, air is prevented from exiting the inlet chamber, and when the first end of the piston is disengaged from the sealing member, air is capable of exiting the inlet chamber;
- and
- (iv) a conduit extending through the body of the piston and facilitating fluid communication between the inlet chamber and the cavity;
- and
- a driving assembly coupled to the valve assembly and configured to facilitate the engagement and disengagement of the piston responsive to a change of pressure in the outlet chamber.
A bypass assembly for a pressure regulator assembly having:
- (i) a valve assembly positioned between an inlet chamber and an outlet chamber and including:
- a piston having a body with a first end and a second end;
- and a sealing member configured for engagement by the first end of the piston, wherein, when the first end of the piston engages the sealing member, air is prevented from exiting the inlet chamber, and when the first end of the piston is disengaged from the sealing member, air is capable of exiting the inlet chamber;
- and (ii) a driving assembly coupled to the valve assembly and configured to facilitate the engagement and disengagement of the piston responsive to a change of pressure in the outlet chamber, the bypass assembly configured to be removably attached to the pressure regulator assembly and configured to disengage the first end of the piston from the sealing member and facilitate the flow of air through the valve assembly and into the outlet chamber.
A self-contained breathing apparatus, comprising:
- at least one air cylinder configured to deliver regulated air through an air hose;
- and
- a breathing mask configured to be worn by a user, the breathing mask having a pressure regulator assembly configured to deliver air from the air hose to an internal area of the mask, wherein the pressure regulator assembly comprises:
- (a) a housing defining an inlet chamber in fluid communication with an outlet chamber;
- (b) a valve assembly positioned between the inlet chamber and the outlet chamber, the valve assembly comprising:
- (i) a piston having a body with a first end and a second end;
- (ii) a cylinder configured to receive the second end of the piston and defining a cavity between an end of the cylinder and the second end of the piston;
- (iii) a sealing member configured for engagement by the first end of the piston, wherein, when the first end of the piston engages the sealing member, air is prevented from exiting the inlet chamber, and when the first end of the piston is disengaged from the sealing member, air is capable of exiting the inlet chamber;
- and
- (iv) a conduit extending through the body of the piston and facilitating fluid communication between the inlet chamber and the cavity;
- and
- (c) a driving assembly coupled to the valve assembly and configured to facilitate the engagement and disengagement of the piston responsive to a change of pressure in the outlet chamber.
-30. (canceled)
Dependencies are inferred from the claim text.