Valves and valve actuation – With correlated flow path – Valve operated by joining flow path sections
Patent
1995-07-21
1997-03-04
Chambers, A. Michael
Valves and valve actuation
With correlated flow path
Valve operated by joining flow path sections
2511491, 285316, F16L 3728
Patent
active
056071396
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a coupling for coupling together a hose or a pipe with another hose or pipe for a pressure medium, said coupling comprising a coupling sleeve and a nipple insertable therein, said coupling sleeve and the nipple being provided with individual connecting means for a hose or a pipe, said coupling sleeve comprising a valve device which is disposed to open for pressure medium flow when the nipple is inserted to an engagement position, said coupling sleeve comprising a sleeve-shaped front part and a sleeve-shaped rear part joined thereto, said rear part being provided with a releasable ball lock for blocking the nipple in the engagement position, on which rear part the connecting means is arranged.
Couplings of this type are known in different designs and are used primarily for gases, such as compressed air, but can also be used for liquids. The nipple is locked in the engaged position in the coupling sleeve by means of the ball locks which normally permit a certain amount of rotation of the nipple relative to the coupling sleeve. This rotatability can, however, be appreciably reduced by dirt penetrating into the ball locks, which can eventually result in the resistance to rotation becoming so great that rotation can only be performed with great difficulty. The result of this can be that a tool coupled by means of a hose to the coupling cannot be used in the desired manner if rotation of the hose is required, without making handling of the tool exceptionally difficult due to twisting of the hose.
In couplings of this type it is also necessary to see that the valve device and the front part have such strength that there is no risk that one of the components will break if the nipple is subjected to bending forces, e.g. as a result of a powerful bending of this hose or as a result of direct mechanical impact, e.g. if the coupling falls against a hard surface. At the same time one should of course keep the material dimensions as small as possible so as to provide sufficient flow-through area for the pressure medium through the coupling.
The invention is intended to achieve a coupling of the type described by way of introduction which assures easy rotatability even if the ball lock should be more or less blocked as a result of dirt penetrating therein. It should also provide good strength in the component parts at the same time as they can be made with relatively small dimensions without restricting the flow-through area. This is achieved according to the invention with a coupling which is characterized by the novel features disclosed in the claims.
The invention will be described in more detail below with reference to the accompanying drawings which show suitable embodiments of the coupling according to the invention and in which:
FIG. 1 is a partially cut-away sideview of a coupling according to the invention,
FIG. 2 is a partially cut-away sideview of the front part of the coupling according to FIG. 1,
FIG. 3 shows a section along the line III--III in FIG. 2,
FIG. 4 shows a central longitudinal section through the valve body in the coupling according to FIG. 1,
FIG. 5 shows a section along the line V--V in FIG. 4, and
FIG. 6 is a partial cut-away sideview of a modified embodiment of the coupling according to the invention in its coupled state.
The coupling shown in FIG. 1 consists of a coupling sleeve 1 and a nipple 2 insertable therein. The coupling sleeve 1 is provided with connecting means 3 for a pipe, a conduit or a hose (not shown), and the nipple 2 is provided with a connecting means 4 for another conduit pipe or conduit hose (not shown).
The coupling sleeve 1 is composed of a sleeve-shaped front part 5 and a sleeve-shaped rear part 6 joined thereto. As can be seen in FIG. 1, the front part 5 is inserted into the rear part 6 and fits relatively well therein. Between the front part 5 and the rear part 6 there is a lock ring 7 which locks the two parts axially relative to each other but permits easy rotation of the front part 5 in the rear part 6. The lock ring 7 is placed in an inter
REFERENCES:
patent: 3052261 (1962-09-01), Nyberg
patent: 4613112 (1986-09-01), Phlipot et al.
patent: 5290009 (1994-03-01), Heilmann
Chambers A. Michael
Nyberg, Bo Erik
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