Valves and valve actuation – With correlated flow path – Valve operated by joining flow path sections
Patent
1996-12-09
1999-09-14
Lee, Kevin
Valves and valve actuation
With correlated flow path
Valve operated by joining flow path sections
2511498, 285331, F16L 2900
Patent
active
059509856
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to coupling devices for fluid conduits which comprise a first and a second main part each arranged to be attached to a respective portion of the conduit and arranged to be connected or disconnected, so as to form a fluid duct between the two conduit portions in the connected position.
BACKGROUND OF THE INVENTION
Coupling devices of this main type are previously known for connecting sections of pipes or hoses. Many different types of such coupling devices are known. One type which is of particular interest in connection with the present invention is that in which at least one main part of the coupling is provided with a valve which automatically closes the fluid duct in the part in question when it is disconnected from the other part. This function prevents, in the disconnected state of the coupling, the fluid from flowing out. The coupling device according to the invention has particular advantages since it is arranged like this type of coupling, which is provided with a valve.
Furthermore, the coupling device according to the invention relates to the field of quick couplings, i.e. the connecting and disconnecting operation can be carried out very quickly by means of a simple manoeuvre. Quick couplings of this kind are of a more developed type of couplings, as compared with the more conventional type which includes screw elements for connection of the two parts. This is something which implies that the connection and disconnection operation takes a longer time, since the turning of the screw element takes a certain time.
A drawback which is related to quick couplings is that a relatively high force must be used during connection and locking of the coupling parts to each other.
This force can be very high if one of the coupling parts is provided with a valve of said type and if this valve is influenced by a certain pressure from the fluid, since the valve body must be displaced against the force of the pressure by forcing the coupling parts together.
SUMMARY OF THE INVENTION:
An object of the present invention is to provide a coupling device of the above-mentioned type which is designed as a quick coupling in which the coupling parts can be connected and locked to each other easily and quickly.
Another object is to facilitate the connection operation in couplings provided with a valve of the above-mentioned type by decreasing the force for opening of the valve which must be applied against the coupling parts by the person who is to connect them.
The object of the invention is obtained by providing the coupling with the features which are stated below.
BRIEF DESCRIPTION OF THE DRAWINGS
Three embodiments of the coupling according to the invention will be described below, with reference to the annexed drawings, in which
FIG. 1 shows a central cross-section of a first part of the coupling;
FIG. 2 shows an end view of said first part;
FIG. 3 shows a central cross-section of a second part of the coupling;
FIG. 4 shows the two parts of the coupling during connection thereof, the first part being shown as a central cross-section and the second part being shown half as a cross-section and half as a view;
FIG. 5 shows a central cross-section of the two parts of the coupling completely connected to each other, wherein FIGS. 1-5 show the first embodiment;
FIG. 6 shows a central cross-section of a portion of the other main part of the coupling according to the other embodiment; and
FIGS. 7 and 8 show the third embodiment as a cross-section, in a non-connected position as well as a completely connected position.
PREFERRED EMBODIMENTS
The coupling consists of two main parts, each of which are mounted on one end of a hose. However, the coupling can be adapted for mounting on pipe ends.
In the embodiment according to FIGS. 1-5, a first part 1 is shaped as a female part of the coupling with a hollow seat 2 provided for a second coupling part 3, which can be designated a male part. A cross-section of the second part 3 is shown in FIG. 3.
The first part is essentially shaped as a cylin
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patent: 3612101 (1971-10-01), Maximov et al.
patent: 3670770 (1972-06-01), Nelson
patent: 4427219 (1984-01-01), Madej
patent: 4819972 (1989-04-01), Champa et al.
Lee Kevin
Sune Sandh
LandOfFree
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