Receptacles – Closures – With condition responsive vent or valve
Patent
1985-06-10
1987-09-01
Marcus, Stephen
Receptacles
Closures
With condition responsive vent or valve
220 3, 220 89B, B65D 2500, F25J 0000
Patent
active
046902953
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a container for pressurised fluids and in particular to containers which minimise the risks arising from sudden increases in internal pressure.
Fluids such as liquefied petroleum gas (LPG) are marketed in a range of portable containers for domestic use e.g. cooking, heating and lighting. Such containers have hitherto been made from steel, aluminium or alloys thereof. The containers generally have a dome at one end and a dispensing nozzle at the other end. The dispensing nozzle is conventionally attached to a relief valve to safeguard against sudden increases in internal pressure. One of the major disadvantages of containers of this type is that they are prone to catastrophic failure especially when exposed to excessive heat e.g. when engulfed by fire. That is, the container either explodes, spilling the contents or, if the relief valve comes into operation, a high pressure jet of the fluid emerges from the valve which can ignite and increase the intensity of the fire considerably.
UK Patent Publication Specification Nos. 995684 and 1204503 describe explosion-proof pressure vessels which have a porous outer and inner wall, the inner wall being provided with a lining of a polyester type material which is impervious over a specific temperature range but becomes gas pervious above that range allowing the contents of the vessel to diffuse through the outer walls slowly. In this manner the risk of explosion due to internal pressure build-up upon exposure to excessive heat is prevented. However, the manufacture of the vessel requires complicated means of applying internal coatings and the vessel needs to have at least an external wall which is porous to the fluid stored under pressure.
It is an object of the present invention to minimise the risks involved in storing potentially hazardous fluids especially in a domestic environment.
Accordingly, the present invention is a container for the storage and transportation of pressurized fluids comprising: be contained therein up to a predetermined temperature but is fluid-pervious above the temperature, liner but exposing the flusible plug portion.
In a still further embodiment of this invention, the container is cylindrical and is provided with a neck portion adapted to receive a discharge nozzle, the neck portion being integral with the inner liner and forming the exposed fusible plug portion. Preferably, the neck portion will also contain a relief valve.
According to a further embodiment, the present invention is a cylindrical container for the storage and transportation of pressurised fluids comprising a thermoplastic inner liner which is stable and impervious to the fluid to be contained therein up to a predetermined temperature range but is fluid-pervious above the temperature and a outer layer of an insulating fire resistant material encasing said inner liner, characterised in that a fusible plug portion, fusible plug portion, and fibrous windings substantially covering the surface of the inner liner, a first axial set wound in planes substantially parallel to or at a slight angle to the axis of the inner liner and a second hoop set wound circumferentially in planes substantially normal to said axis of the inner liner, the second hoop set overlying the first axial set at least along the cylindrical portion of the inner liner.
An embodiment of the invention is illustrated in the single FIGURE of the drawing which is an axial section of the container of the invention.
An essential feature of the present invention is the exposed plug portion 1 which is part of the inner liner 2 but is not covered by the insulating outer layer 3. By "exposed" is meant that the fusible plug portion 1 is not covered by the outer layer of insulating fire resistant material. In this manner, the exposed fusible plug portion is first affected by any excessive heat in the environment and provides an escape for pressure build-up. By choosing a thermoplastic inner liner 2 having the correct thermal stability for the environment to which the container is likel
REFERENCES:
patent: 3137405 (1964-06-01), Gorcey
patent: 3266660 (1966-08-01), Ragettli
patent: 3334780 (1967-08-01), Van Leer et al.
patent: 3356257 (1967-12-01), Eimer
patent: 3449182 (1969-06-01), Wiltshire
patent: 3776412 (1973-12-01), Mink
patent: 3840139 (1974-10-01), Harmon
patent: 3907149 (1975-09-01), Harmon
patent: 3908851 (1975-09-01), Jacobs
patent: 4085860 (1978-04-01), Hawkins et al.
patent: 4147272 (1979-04-01), Stenner et al.
Gehman Bryon
Marcus Stephen
The British Petroleum Company p.l.c.
LandOfFree
Pressure container with thermoplastic fusible plug does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure container with thermoplastic fusible plug, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure container with thermoplastic fusible plug will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1259672