Ring reinforcement for conventional drum

Details Ring reinforcement for conventional drum Ring reinforcement for conventional drum

1997-05-14

2001-03-13

Moy, Joseph M. (Department: 3727)

Receptacles

Separate reinforcing element

Internally attached reinforcing element

Reexamination Certificate

active

06199716

ABSTRACT:

This invention relates to conventional drums and more particularly to the reinforcement of the head and bottom of a conventional 55 gallon drum to prevent bulging of the drum when shipping product under mild pressure in the range of 25 psi and below.
BACKGROUND OF THE INVENTION
Conventional 55 gallon drums are produced in quantity and utilized to ship a broad range of liquid product. Unfortunately, these containers are generally unsuitable for shipping product with any appreciable vapor pressure. Simply stated, the drums bulge at their respective heads and bottoms. When this condition occurs, the drums are no longer stable when standing on their respective ends.
There is a need to ship product in 55 gallon drums under mild pressure. New refrigerants furnish an example.
Specifically, refrigerants replacing those refrigerants having CFC's (chlorofluorocarbons) are an example of such products. Simply stated, inexpensive containers capable of withstanding 25 psi without significant distortion are needed to ship these new refrigerants. Presuming that adequate reinforcement can be found, there is no reason why conventional and low cost 55 gallon drums cannot be utilized.
SUMMARY OF THE INVENTION
A ring reinforcement is utilized on the circular head and bottom of a conventional 55 gallon drum. The conventional drum contains a cylindrical steel body having the two conventional V-shaped ribs rolled into the sidewalls at the middle of the cylinder. The drum—when either of the open-head or closed-head variety—has a circular head and a circular bottom closing in sealed relationship with the drum interior. This circular head and circular bottom are reinforced by welding a drum-reinforcing rim preferably inside the barrel. It has been found that remarkable resistance to bulging results, enabling the barrel to be shipped with product with up to 33 psi pressure relative to the barrel exterior without objectional distortion.


REFERENCES:
patent: 1045055 (1912-11-01), Mittinger, Jr.
patent: 2269617 (1942-01-01), Borstel
patent: 2301061 (1942-11-01), Logeman
patent: 2445730 (1948-07-01), Kuhn
patent: 2813655 (1957-11-01), Hall
patent: 3186583 (1965-06-01), Zundel
patent: 3339793 (1967-09-01), Gerlovich
patent: 3929249 (1975-12-01), Sheppard

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