SINGLE LOCK AND DOUBLE LOCK COUPLINGS HAVING A LOCKING RING WITH IDENTIFYING INDICIA AND METHODS OF USE AND ASSEMBLY

摘要

Couplings for use with mating couplings with locking rings are disclosed. A stem coupling may have a coupling head configured to attach with a head portion of the mating coupling, a stem mated to the coupling head where the stem has a threaded portion on an outer surface, and a retractable locking sleeve positioned on a portion of the coupling head. The retractable locking sleeve may have a locked position and an unlocked position for preventing and permitting the coupling head to attach to or_detach from the mating coupling. The stem coupling includes a stem locking ring having a first position preventing axial movement of the locking sleeve and a second position permitting axial movement of the locking sleeve. The stem locking ring may also include at least one of a color and indicia to alert a user to a type of media for which the stem coupling is intended.

主权项

1. A stem coupling for use with a mating coupling, comprising:
a coupling head configured to attach with a head portion of the mating coupling; a stem mated to the coupling head, the stem comprising a threaded portion on an outer surface thereof; a retractable locking sleeve positioned on a portion of the coupling head, the retractable locking sleeve having a locked position preventing the coupling head from attaching to or detaching from the mating coupling, and an unlocked position permitting the coupling head to attach to or detach from the mating coupling; and a stem locking ring having internal threads and configured to be threadedly connected to the threaded portion of the stem, the stem locking ring comprising a first surface adapted to abut the retractable locking sleeve in a first position preventing axial movement of the retractable locking sleeve from the locked position to the unlocked position, and a second position spaced apart from the retractable locking sleeve permitting axial movement of the retractable locking sleeve from the locked position to the unlocked position, wherein the stem locking ring further comprises at least one of a color and indicia to alert a user to a type of gas or liquid for which the stem coupling is intended.