Multiple duct underground conduit

US3977703A · kind A · utility

Inventor

• John S. Curtis · Mayfield Heights, US

Key dates

• Filing date: Dec 18, 1974
• Grant date: Aug 31, 1976
• Expiry date: Dec 18, 1994

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S285/915
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Multiple duct underground conduit and method of installing the same which involves plastic tubing and male and female coupling plates which can be field assembled at the trench site to form sections which are then connected to each other in the trench without requiring someone in the trench. One form of the invention uses a wedge lock while the other employs a hook and latch, both forms simply requiring lowering of one section adjacent the other. Concrete may then be poured about the conduit in the trench and the trench covered.