Pipe joints or couplings – Convertible
Patent
1980-12-25
1983-03-01
Arola, Dave W.
Pipe joints or couplings
Convertible
285 38, 285101, F16L 2500
Patent
active
043752977
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a quick coupling device.
Such a quick coupling device can be used for temporary connection of a pressurized fluid conduit, such as a hose, to the end of a pipe or a pipe nipple, e.g. belonging to an armature, a vessel for pressurized fluid or the like. Such a connection is especially useful when performing tightness tests or leak detection operations, wherein the armature, the vessel or the like is supplied with pressurized air or some other pressurized fluid during a prescribed, usually rather short time period, so that a large number of objects can be tested per time unit.
A previously known quick coupling device comprises a cylindrical casing and a piston mounted for displacement therein, the casing and the piston being adapted for permanent connection to a pressurized fluid conduit, and the piston having a through opening permitting the flow of pressurized fluid to the pipe nipple. When the piston is actuated, a sealing sleeve consisting of elastic material is axially compressed, so that the latter expands radially and thereby seals against the cylindrical wall of the pipe.
In certain cases, it may be less suitable or even impossible to achieve such a radial sealing effect, e.g. when useing a pipe nipple which is threaded internally as well as externally.
Therefore, the object of the invention is to develop the known device further in such a way that an effective sealing effect can be achieved even for nipples provided with threads.
Thus, according to the invention, the quick coupling device is screwed into or onto the pipe nipple, so that a mechanical connection is obtained, whereupon the pressurized fluid sealing is achieved by a relative axial displacement of the cylindrical casing and the piston, so that a ring gasket is pressed axially against the end surface of the pipe nipple.
The invention will be described further below with reference to the drawings.
FIG. 1 is a central section through a first embodiment of the quick coupling device according to the invention; and
FIG. 2 illustrates in like manner a second embodiment.
The quick coupling device shown in FIG. 1 is intended to be connected to a vessel 1 provided with a pipe nipple 2 secured by welding and having an internal thread. The device comprises a cylindrical casing 3, in which a piston having two parts 4a, 4b is displaceably mounted. The casing 3 has a radial bore 5 with a thread for permanent connection of a pressurized fluid hose (not shown) and another radial bore 6 with a connecting channel 7 intended to be connected to an actuating pressurized fluid hose (not shown) and which communicates with the wider cylindrical portion inside the casing 3 axially between the wall of the casing and the piston portion 4a. By applying an actuating pressure, the casing 3 and the piston 4a, 4b will be displaced axially relative to each other. This axial displacement is used to achieve the desired sealing effect. Thus, the piston portion 4b, which is provided with an external thread at its outer end, is first screwed somewhat into the nipple 2 (which can be done easily by hand by means of the knurled handle 4 c of the piston); then the actuating pressure is applied so that the casing 3 is pressed axially against the pipe nipple and a ring gasket 8 seals at the end surface of the pipe nipple 2. The piston portion 4b has a through opening 9 communicating with the bore 5 of the casing 3 and consisting of an axial bore and four radial holes. Thus, in this position, the pressurized fluid hose or the like will communicate with the nipple 2 and the vessel 1.
FIG. 2 shows an embodiment of the device intended to be screwed onto an externally threaded pipe nipple. In this case, the device must be provided with an internal thread, and the latter is formed in the casing, which consists of three parts 3a, 3b and 3c. The piston 4 is made in one piece and has an axial through opening 5,9, and a pressurized fluid hose can be connected to the upper end 5, while the actuating fluid may be supplied via an opening 6 in the casing portion 3a.
In o
REFERENCES:
patent: 664341 (1900-12-01), Trommlitz et al.
patent: 2154526 (1939-04-01), Parkerton
patent: 2712458 (1955-07-01), Lipson
patent: 2819733 (1958-01-01), Maisch
patent: 3291442 (1966-12-01), Cranage
patent: 3727952 (1973-04-01), Richardson
patent: 4227721 (1980-10-01), Reedy et al.
Arola Dave W.
Nolek System AB
LandOfFree
Quick coupling device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quick coupling device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quick coupling device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1458549