First reducing stage for a two-stage regulator
OwnerStefano Morinoinventor
Life of this patent
Estimating the term…
Abstract
First reducing stage for a two-stage regulator, including a nozzle connected by a yoke and a clamping screw to an inlet, a pressure chamber, and a shutoff member that slides, guided by a piston or by a diaphragm, inside the pressure chamber. The adjacent compensating chamber contains a helical spring coaxial with the shutoff member and the end of the shutoff member is provided with a thermally insulating component. In the compensating chamber there is interposed, between the helical spring and the tubular part of the shutoff member, for the entire length of the spring, a thermally insulating component. That side of the diaphragm which communicates with said pressure chamber also has a covering of thermally insulating material. The helical spring is completely covered in thermally insulating material.
Claims12
A first reducing stage for a two-stage scuba regulator, comprising:
- a pressure chamber which communicates with a high pressure gas source;
- a compensating chamber separated from said pressure chamber by a partition wall having a hole therein;
- an axially movable tubular shutoff member which extends sealingly through said hole in said partition wall and which has an inlet end in said pressure chamber and an outlet end in said compensating chamber;
- a valve seat provided in said pressure chamber opposite to said inlet end of said shutoff member and which cooperates with said inlet end to shut off flow through said shutoff member;
- a piston in said compensating chamber fastened to said outlet end of said shutoff member, said piston being axially movable in a sealing manner in said compensating chamber;
- a helical pressure spring arranged around said shutoff member and between said piston and said partition wall to bias said inlet end of said shutoff member away from said valve seat, said helical spring including a thermally insulating covering;
- an aperture in said compensating chamber adjacent said helical spring which provides communication between said compensating chamber and an ambient environment;
- and
- a thermally insulating component interposed radially between said helical spring and said shutoff member and disposed along an entire length of said shutoff member in said compensating chamber.
A first reducing stage for a two-stage scuba regulator, comprising:
- a pressure chamber which communicates with a high pressure gas source, said pressure chamber including a wall, an outlet in said wall, and a valve seat adjacent said outlet;
- a compensating chamber separated from said pressure chamber by a diaphragm;
- an axially movable tubular shutoff member in said pressure chamber which is biased into sealing contact with said valve seat to shut off flow from the high pressure source to said outlet, said shutoff member including an axial portion which extends through said outlet and into contact with said diaphragm;
- a helical spring in said compensating chamber which biases said diaphragm toward an opening movement of said shutoff member, said helical spring including a thermally insulating covering;
- an aperture in said compensating chamber adjacent said helical spring which provides communication between said compensating chamber and an ambient environment;
- and
- a thermally insulating component interposed between said helical spring and said shutoff member and disposed along an entire length of said diaphragm adjacent said pressure chamber.
Dependencies are inferred from the claim text.