Liquid storage tank assembly
OwnerJoseph R. Mooneyinventor
Life of this patent
Estimating the term…
Abstract
An underground liquid storage tank assembly including an inner vessel, preferably of steel or other strong, economical material; a seamless outer containment shell, preferably of strong corrosion resistant material such as fiberglass reinforced plastic; and an intermediate spacer member between the inner vessel and outer containment shell to hold the two members rigidly together and for allowing the free passage inside the outer containment shell of any liquid that might leak from the inner vessel. Structure is preferably provided inside the outer containment shell to allow the presence of leakage from the inner vessel to be detected.
Claims8
Underground liquid storage tank assembly comprising, in combination:
- (a) an inner tank having an outer surface;
- (b) an outer tank having an inner surface;
- and
- (c) spacer means positioned between and securely joining said inner and outer tanks, said spacer means having a first surface for being ridigly attached to said outer surface of said inner tank and having a second surface for being rigidly attached to said inner surface of said outer tank, said spacer means having a plurality of spaced apart, parallel channels in said first surface thereof for allowing any leakage of fluid from said inner tank to pass therethrough, said channels covering no more than 75% of said first surface of spacer means with at least 25% of said outer surface of said inner tank being rigidly secured directly to said first surface of said spacer means and with at least 25% of said inner surface of said outer tank being rigidly secured directly to said second surface of said spacer means for joining said inner tank and said outer tank thereto as a rigid combination.
Underground liquid storage tank assembly comprising in combination:
- (a) a metal primary tank for storing a quantity of liquid;
- (b) a metal secondary tank fixedly and rigidly attached to said primary tank and having a capacity of approximately 20 percent of the capacity of said primary tank;
- (c) a fiberglass reinforced plastic outer tank for completely enclosing said primary and secondary tanks;
- and
- (d) a layer of plastic foam for being positioned between and securely and rigidly joining said primary and secondary tansk and said outer tank, said layer of plastic foam having a first side fixedly attached to the outer surface of said primary tank and said secondary tank, having a second side fixedly attached to the inner surface of said outer tank, having a slot extending therethrough at the lowest point thereof, and having a plurality of spaced apart, parallel channels in said first side thereof communicating with said slot for allowing any fluid that leaks from said primary tank to pass to said slot, each of said channels being arranged in a substantially vertical plane, said channels covering no more than 30% of said first surface of said layer of plastic foam with at least 70% of said outer surface of said inner tank being rigidly secured directly to said first surface of said layer of plastic foam and with at least 70% of said inner surface of said outer tank being rigidly secured directly to said second surface of said layer of plastic foam for joining said inner tank and said outer tank thereto as a rigid combination.
Dependencies are inferred from the claim text.