Abstract: A hydraulic coupling suitable for high pressure gas service has a male member, a female member, and a coupling member, where the male member and female member have corresponding sealing faces which mate together. The sealing face of the male member has a protruding lip member, which defines a primary seal and a second seal backwardly disposed from the primary seal. Upon application of axial force, which drives the two sealing faces together, the protruding lip member makes engaging contact with a portion of the sealing face of the female member. Upon application of further axial force, the second sealing member is deflected into a portion of the female sealing face, such that both the first sealing member and the second sealing member are in sealing contact with the female sealing face.

Abstract: A self-locking coupling device for coupling to a fitting having a radially outwardly facing groove using a coupling body with a central bore and an axially extending collar having a throughbore including a spring and actuating pin with a locking tab and further having first and second catches corresponding to and engageable with first and second slots in a rotatable locking ring mounted concentrically about the collar so as to position the locking tab within the throughbore in an unlocked position and within the central bore in a locked position so as to restrict the axial movement of the coupling body relative to the fitting when the groove is radially aligned with the pin.

Abstract: A self-locking coupling device for coupling to a fitting having a radially outwardly facing groove using a coupling body with a central bore and an axially extending collar having a throughbore including a spring and actuating pin with a locking tab and further having first and second catches corresponding to and engageable with first and second slots in a rotatable locking ring mounted concentrically about the collar so as to position the locking tab within the throughbore in an unlocked position and within the central bore in a locked position so as to restrict the axial movement of the coupling body relative to the fitting when the groove is radially aligned with the pin.

Abstract: The invention is directed to self-locking coupling devices which are suitable for connecting conduits, pneumatic line segments, hydraulic line segments, fuel line segments or other fluid line segments tubes, ducts, and the like. The self-locking coupling device consists of a first fitting, a second fitting, and a locking sleeve. The first fitting having a first end connect to a first conduit and a second end for receiving a second fitting attached to a second conduit. The first fitting having a coupling portion and a locking portion. The coupling portion formed with an internal thread section. The locking portion having at least one locking tang attached to the coupling portion and extending to the second end of the first fitting. The at least one locking tang formed with an internal locking shoulder projecting radially inwardly at the second end of the first fitting. The second fitting having a first end and a second end.

Abstract: The invention is directed to self-locking coupling devices which are suitable for connecting conduits, pneumatic line segments, hydraulic line segments, fuel line segments or other fluid line segments tubes, ducts, and the like. The self-locking coupling device consists of a first fitting, a second fitting, and a locking sleeve. The first fitting having a first end connect to a first conduit and a second end for receiving a second fitting attached to a second conduit. The first fitting having a coupling portion and a locking portion. The coupling portion formed with an internal thread section. The locking portion having at least one locking tang attached to the coupling portion and extending to the second end of the first fitting. The at least one locking tang formed with an internal locking shoulder projecting radially inwardly at the second end of the first fitting. The second fitting having a first end and a second end.

Abstract: The invention is directed to self-locking coupling devices which are suitable for connecting conduits, pneumatic line segments, hydraulic line segments, fuel line segments or other fluid line segments tubes, ducts, and the like. The self-locking coupling device consists of a first fitting, a second fitting, and a locking sleeve. The first fitting having a first end connect to a first conduit and a second end for receiving a second fitting attached to a second conduit. The first fitting having a coupling portion and a locking portion. The coupling portion formed with an internal thread section. The locking portion having at least one locking tang attached to the coupling portion and extending to the second end of the first fitting. The at least one locking tang formed with an internal locking shoulder projecting radially inwardly at the second end of the first fitting. The second fitting having a first end and a second end.