Patent ID: 6820615
Filing Date: 2004-11-23
Classification: B63C,Y10S

Abstract:
The mask tightening strap comprising an arc-shaped, adjustable fastening unit, two straps, two pressure pieces, and a frame for the mask, whereby said two pressure pieces are configured at a central portion on an exterior surface of said arc-shaped fastening unit;fastening straps of said two straps are respectively pivotally affixed to each of the side pieces of said frame, and free ends of said traps are each threaded through two sides of said arc-shaped fastening unit; and said straps are then folded back along the exterior of the two sides; and characterized such that the inner sides of said traps are sleeved within a strap cover close to said frame, an hollowed-out section, or hollowed-out portion, is defined by the side of said fastening strap configured to enable a retaining ring of a snorkel to clasp onto the strap through its said hollowed-out section, thereby completely separating said retaining ring from the diver's skin.