Fluent material handling – with receiver or receiver coacting mea – Filling means with receiver or receiver coacting means – Interlocked discharge means – support and/or coupling
Patent
1996-04-10
1998-03-10
Jacyna, J. Casimer
Fluent material handling, with receiver or receiver coacting mea
Filling means with receiver or receiver coacting means
Interlocked discharge means, support and/or coupling
141287, 141352, 141354, 141384, B67D 537
Patent
active
057250340
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a pressurized fluid dispensing nozzle and is particularly, but not only, concerned with such a nozzle suitable for dispensing liquid petroleum gas (LPG).
There have been many proposals for coupling an LPG dispensing nozzle to a tank inlet. In all of these, when the nozzle is coupled to the tank inlet, for example by a screw-threaded cooperation, a seal needs to be formed between the outlet end of the nozzle and the trunk inlet. One such proposal is described in Australian Patent Specification AU-A-79191/87 in which a sealing nose-piece is slidably disposed within the outlet end portion of the nozzle and is spring biased to engage the tank inlet as the nozzle is screw-threadedly connected to the inlet. In practice only a one-half turn is required to fully engage the nozzle with the tank inlet. Usually the nose-piece engages a rubber face seal or other gasket associated with the tank inlet, but commonly this gasket is missing from the vehicle. This means that a less reliable seal may be formed between the nose-piece and tank inlet since the nose-piece may be able to be displaced rearwardly relative to the remainder of the nozzle by the pressure of the LPG as it is dispensed from the nozzle. Similar problems may arise if the screw-threaded connector of the nozzle is not fully tightened onto the tank inlet, for example because of a cross-threaded engagement, or becomes loose during use.
OBJECT AND SUMMARY OF THE INVENTION
It is an object of the present invention to alleviate the aforementioned disadvantages and there is accordingly provided a pressurized fluid dispensing nozzle comprising a connector for coupling the nozzle to a tank inlet, a valve for controlling the dispensing flow of fluid through the nozzle in a forward generally axial direction and a sealing nose-piece which is engageable with a seal face of the tank inlet for providing a seal between the nozzle and the tank inlet when the nozzle is coupled to the tank inlet, the sealing nose-piece being provided on a sealing sleeve through which the fluid is dispensed to an outlet end of the nozzle defined by said nose-piece, the sealing sleeve being axially displaceable in opposed directions relative to the connector, and wherein axial displacement of the sealing sleeve in the forward direction is actuated by the dispensing flow of pressurized fluid through the nozzle when the valve is open whereby when the nozzle is coupled to the tank inlet the nose-piece is driven by the pressurized fluid into engagement with said seal face.
The sealing sleeve is conveniently mounted for limited axial displacement on a seal member having a passage extending generally axially therethrough through which the dispensing flow of fluid passes to the outlet end of the nozzle. The seal member may also be axially displaceable relative to the connector, but the rearwards axial displacement of the seal member should be restricted in order to ensure an adequate seal can be maintained by the nose-piece. The seal member may incorporate a rearwardly-projecting actuator for opening the valve.
Further according to a preferred embodiment of the present invention there is provided a pressurized fluid dispensing nozzle comprising a connector for coupling the nozzle to a tank inlet, a valve for controlling the dispensing flow of fluid through the nozzle in a forward generally axial direction a sealing nose-piece which is engageable with a seal face of the tank inlet for providing a seal between the nozzle and the tank inlet when the nozzle is coupled to the tank inlet, and a seal member which is permitted limited axial displacement relative to the connector, the seal member having a passage therethrough for the dispensing flow of fluid and further comprising a rearwardly projecting actuator for opening the valve, the seal member being displaced rearwardly towards a valve actuating condition by engagement of the nose-piece with the seal face of the tank inlet, and wherein the nose-piece is provided on a sealing sleeve which
REFERENCES:
patent: 2096499 (1937-10-01), Mandell
patent: 3086565 (1963-04-01), Mosher
patent: 3422864 (1969-01-01), Allinquant
patent: 3805857 (1974-04-01), Johnson et al.
patent: 4907630 (1990-03-01), Kulikowski et al.
patent: 4967999 (1990-11-01), Otsuki et al.
Brooks David Richard
Fry David Andrew
Gogas (Australia) Pty. Ltd.
Jacyna J. Casimer
LandOfFree
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