Fluent material handling – with receiver or receiver coacting mea – Multiple passage filling means for diverse materials or flows – With valve operated by receiver engaging means
Patent
1985-04-11
1987-04-21
Marcus, Stephen
Fluent material handling, with receiver or receiver coacting mea
Multiple passage filling means for diverse materials or flows
With valve operated by receiver engaging means
141 18, 141 20, 141291, B65B 318
Patent
active
046588710
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a valve for filling a liquefied gas container by means of a recharging tank equipped with a cylindrical filling neck, the valve including at least a stationary part, a mobile part mounted to slide in an axial chamber of the stationery part and a fluid-tight seal, the axial chamber communicating with an opening on an outside face of the stationary part. The valve includes two passages, one being a passage for refilling the liquefied gas and the other an escape or vent passage to join the inside of the container in communication with the outside. The valve is intended to be activated by the introduction of the filling neck into the axial chamber to move the mobile part and the seal against the action of a spring from a closed position, where the seal is in contact with the stationary part and the mobile part so as to block the two passages, to a filling position where the seal is in contact with the stationary part and the filling neck to open the two passages.
A valve of this type, intended particularly to equip a gas lighter, is described in Swiss Patent No. 355,167 which discloses a seal consisting of an O-ring housed in a groove of the stationary part opposite the opening of the escape passage.
Valves of this type are normally equipped with a cover of plug which must be removed to allow filling. Experience shows that this plug is often lost through use. Moreover, this plug is generally screwed on, which complicates the filling operation. Less often, the plug is introduced with friction into the opening and in this case, it is of a relatively complicated manufacture, because if it is desired that it be flush with the face of the container which is equipped with the valve, it must exhibit a retractable element that can be extended to allow its removal, when filling must be done.
This invention has as its object to eliminate the risk of losing the plug while making possible the closing of the opening for filling by an element constituting a portion of the face of the container which is equipped with the valve, when this latter is in a closed position.
SUMMARY OF THE INVENTION
For this purpose, the valve according to the invention is characterized in that the mobile part includes an end portion whose dismeter corresponds to that of said opening, this end part being shaped so that in the closed position of the valve this part is located approximately in the plane of the outer face of the stationary part.
According to an advantageous embodiment, the fluid-tight seal comprises a unitary element having two portions axially separated by a cylindrical part. A first of these two portions is in contact with the mobile part and cooperates therewith to move the seal from a first position to a second position when the mobile part is moved from the closed position to the filling position. The second portion of the seal is formed so as to block the escape passage when the seal is in said first position and wherein it is subsequently squeezed between the cylindrical filling neck and the walls of the axial chamber of the stationary part, in a position separated from the escape passage, when the seal is axially displaced to said second position.
As a result of this particular arrangement of the seal having two portions axially separated by a cylindrical part, the seal is shifted, during filling, by the mobile part into such a position that it assures a complete blockage between the filling neck and the stationary part of the valve and a perfect isolation of the filling and escape passages. This design makes it possible to make a valve with a very safe operation capable of working with a recharging tank equipped with a simple cylindrical end.
BRIEF DESCRIPTION OF THE DRAWING
The accompanying drawing shows diagrammatically and by way of example an embodiment of the valve, which is the object of the invention.
FIG. 1 is a view in longitudinal section of the valve in the closed position.
FIG. 2 shows the same valve in a filling position.
DESCRIPTION OF THE PREFERRED
REFERENCES:
patent: 2769325 (1956-11-01), Storch
patent: 3039499 (1962-06-01), Peterson
patent: 3211194 (1965-12-01), Projahn
patent: 3228435 (1966-01-01), Kanamaru
patent: 3277674 (1966-10-01), Klein et al.
patent: 3391716 (1968-07-01), Projahn
patent: 3473704 (1969-10-01), O'Donnell
Gendey Yves
Zellweger Conrad
Cusick Ernest G.
Marcus Stephen
O'Brien Anthony A.
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