Receptacles – Compartmented container – Intercommunicable compartments
Patent
1997-09-16
1999-08-31
Castellano, Stephen
Receptacles
Compartmented container
Intercommunicable compartments
220565, 220564, 220 424, 220 413, B65D 9002
Patent
active
059442158
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a light and strong vessel for a pressurized fluid, arranged to withstand an internal pressure of at least 5 atmospheres. It has an upper end wall and a lower end wall which are both part-spherical and an intermediate part with an outer wall and internal partition walls. The outer wall and the internal partition walls are firmly connected with the end walls and the internal partition walls are placed in such a way in respect of each other and the outer wall that at least two longitudinal compartments for pressurized fluid are formed. These compartments are communicating with each other and run between the end walls.
For a long time it has been considered necessary to design vessels for a pressurized fluid as a cylinder with a circular cross section to make them strong enough to resist the pressure from the pressurized fluid in the vessel. Usually these vessels are made of metal without partition walls.
However, a few other pressure vessels which can have a non circular cross section have been disclosed before, Thus, the old U.S. Pat. No. 2,341,044 shows a container comprising truncated intersecting spherical shell sections. A plate-like partition wall is welded to the adjacent intersecting edges of these sections. The vessel is made of metal and it is very big. It can have a rather square cross section. According to this old invention it is essential that the vessel is made of spherical shell sections, which give a rather flat construction. The compartments in the vessel will be spherical and the volume of the vessel will depend on the seize of the spheres and the number of such spheres.
The known metal vessel has many disadvantages. For instance it will be very heavy. In addition the welding of the partition walls will result in weaker parts in the construction.
Moreover metal vessels have the drawback that the pressure in the vessel will increase when the vessel is heated. This depends on the fact that the fluid stored in the vessel will have a greater volume expansion than the metal vessel.
In a plastic vessel the situation will be the opposite since the plastic has a higher volume expansion than the fluid. To avoid that the metal vessel will be destroyed at an increased temperature the thickness of the walls has to be increased which will increase the weight of the vessel even more.
From the U.K. patent 1,522,609 it is known to produce huge metal tanks for ships, which tanks are used for storage of fluid under pressure. The tanks are obtained by welding steel plates together in such a manner that several longitudinal chambers are obtained. These known tanks have the same disadvantages as the vessel according to the above U.S. Pat. No. 2,341,044.
According to the present invention it has been possible to avoid the above disadvantages and bring about a light and strong plastic vessel for a pressurized fluid, arranged to withstand an internal pressure of at least 5 atmospheres. It has an upper end wall and a lower end wall which are both part-spherical and an intermediate part with an outer wall and internal partition walls. The outer wall and the internal partition walls are firmly connected with the end walls and the internal partition walls are placed in such a way in respect of each other and the outer wall that at least two longitudinal compartments for pressurized fluid are formed. These compartments are communicating with each other and run between the end walls. The vessel is characterized in that the partition walls are made in one homogenous part with each other and with the outer wall, that the vessel is non-circular, for example with an essentially triangular, rectangular or polygonal cross-section, that each compartment along the outer wall of the vessel is limited outwards by the outer wall and inwards by one, two or three partition walls of which two make a pair, whereby one end of each wall of such a pair is firmly joined to the outer wall and the other two ends of such a pair are firmly joined to each other or to a third partition wall which in its turn oft
REFERENCES:
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patent: 3215304 (1965-11-01), Rohe
patent: 4182254 (1980-01-01), Secord
patent: 4297846 (1981-11-01), Cadeddu
patent: 5564587 (1996-10-01), Falk et al.
patent: 5704512 (1998-01-01), Falk et al.
Castellano Stephen
Perstorp AB
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