Plastic underground tank

• US 20070158351A1
• Filed: 01/04/2007
• Published: 07/12/2007
• Est. Priority Date: 01/06/2006
• Status: Active Grant

• Current Assignee: Manfred Roth
• Original Assignee: Manfred Roth
• Inventors: Roth, Manfred
• Granted Patent: US 7,637,386 B2
• Time in Patent Office: Days
• US Class Current: 220/565
• CPC Class Codes: E03B 3/03 Special vessels for collecting or storing rain-water for use in the household, e.g. water-butts containers for storage, in general, B65D
• CPC Class Codes: E03F 11/00 Cesspools emptying cesspools E03F7/00; features relating to treatment of sewage C02F
• CPC Class Codes: Y02A 20/108 Rainwater harvesting

Abstract

A tank has a pair of elongated, generally parallel, and hollow plastic chambers having longitudinally extending side walls and closed ends, and a transverse plastic connector tube having one end connected to and opening into one of the elongated chambers and an opposite end connected to and opening into the other of the elongated chambers.

Claims

1. A tank comprising:

a pair of elongated, generally parallel, and hollow plastic chambers having longitudinally extending side walls and closed ends; and

a transverse plastic connector tube having one end connected to and opening into one of the elongated chambers and an opposite end connected to and opening into the other of the elongated chambers.

2. The tank defined in claim 1 wherein the chambers are of round cross-sectional shape.

3. The tank defined in claim 2 wherein the tube is of round cross-sectional shape.

4. The tank defined in claim 2 wherein the chambers are generally cylindrical and have a diameter of at most 150 cm.

5. The tank defined in claim 1 wherein the walls and ends of the chambers are of single thickness.

6. The tank defined in claim 1 wherein the chambers and the tube are of generally the same cross-sectional size.

7. The tank defined in claim 6 wherein the tube is formed with an upwardly open access hole.

8. The tank defined in claim 1 wherein the tank has two such transverse connector tubes extending parallel to but at a spacing from each other between the longitudinal chambers, the tank further comprising

a web connected to and extending between the tubes.

9. The tank defined in claim 8 wherein the web is also connected to and extends between the chambers.

10. The tank defined in claim 9 wherein the web is a planar plastic plate integrally joined to the tubes and chambers.

11. The tank defined in claim 10 wherein the web lies in a plane including center axes of the chambers and tubes.

12. The tank defined in claim 1 wherein each of the longitudinal chambers is formed by a pair of substantially identical end sections each connected via a respective such tube connector to another such end section, and a central extension tube fixed between the end sections.

13. The tank defined in claim 12 wherein each of the end sections has a flange and each of the tube sections has a flange fixed to a respective one of the end-section flanges.

14. The tank defined in claim 13 wherein the end sections and central extension tube are cylindrical and of generally the same diameter.

15. The tank defined in claim 1 wherein the longitudinal chambers are centered on horizontal longitudinal axes.