Patent · US Active

Road manhole

US7491010B2 · kind B2 · utility

2Cited by

12References

17Claims

0Family size

Assignee

SAINT-GOBAIN PAM · FR

Inventors

Arnaud Cuny · Toul, FR
Jacky Boca · Dieulouard, FR

Key dates

Filing date	Dec 12, 2007
Grant date	Feb 17, 2009
Priority date	—
Expiry date	Dec 12, 2027

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE02D29/149
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

This road manhole comprises a frame (4) which delimits an opening (6) and which is provided with an internal collar (8) which extends radially inwards, a cover (10) which comprises a blocking web (12) and a cylindrical skirt (14) which complements the internal collar (8), the blocking web and the skirt defining a concave corner (16), and a main gasket (18) which is arranged on the internal collar (8) and which is interposed in the closed state between the cover (10) and the frame (4).The road manhole (2) comprises an auxiliary gasket (20) which is in contact, at least in the closed state, with the concave corner (16).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.