Abstract: A self-sealing fill nipple for a pressure regulator having a fill port, includes a body having a first end having a quick connect fitting, a mid-body region and a threaded region for threadedly engaging the pressure regulator at the fill port. The threaded region extends from about an end of the body toward the mid-body region and is spaced therefrom by a gap. The threaded region has crest and root diameters. The mid-body region includes a tightening element proximal the quick connect fitting and a gap between the tightening element and the threaded region. The gap has a diameter equal to or less than the threaded region root diameter. A combination of a pressure regulator and a self-sealing fill nipple are also disclosed.

Abstract: A pressure regulator for controlling the delivery of gas from a high pressure source to a low pressure device. The pressure regulator includes a distribution body and a pressure adjusting mechanism. The distribution body has a high pressure region and a low pressure region formed therein. The pressure adjusting mechanism controls the transfer of gas from the high pressure region to the low pressure region. The pressure adjusting mechanism includes a piston, an adjusting slug, a seat retainer, a regulator seat, a regulator pin, and a resilient spring.