Patent ID: 8166974
Filing Date: 2012-05-01
Classification: B63C

Abstract:
1. A second-stage regulator for scuba divers, which comprises a regulator body with an inlet conduit for connecting to a first-stage regulator that delivers a breathable gaseous mixture at a relatively constant pressure, an outlet conduit for connection to a user's mouthpiece, and an opening blocked by a deformable diaphragm, the inlet conduit forming an inlet chamber and an intermediate chamber separated by a valve seat, against which a head of a poppet movable within the intermediate chamber is elastically biased, a tail of the poppet projecting into an outlet chamber through an opening in a baffle that separates the intermediate chamber from the outlet chamber, and being connected to one end of a lever hinged to the baffle, the other end of the lever resting against the diaphragm so that a vacuum generated upon the user's inhalation causes the diaphragm inside the outlet chamber to flex inwardly and the lever to rotate, with consequential displacement of the poppet that, when lifted away from the valve seat, allows passage of the gaseous mixture from the inlet chamber, through the intermediate chamber and a passage between the intermediate chamber and the outlet chamber, to the outlet chamber, wherein inside the intermediate chamber, and coaxial to the poppet, a flexible sleeve is coupled by an airtight connection to the poppet and to the baffle about the opening in the baffle, the width of the poppet tail being substantially less than that of the opening so as to provide clearance for movement of the tail transversely to the opening of the baffle.