Patent · US Active

Swing-out manhole cover

US7832958B2 · kind B2 · utility

4Cited by

9References

8Claims

0Family size

Assignee

East Jordan Iron Works, Inc. · US

Inventors

Lee M. Veldboom · East Jordan, US
Kevin S. Vrondran · East Jordan, US
Jeremy I. Johnson · Cambridge, GB

Key dates

Filing date	Nov 27, 2007
Grant date	Nov 16, 2010
Priority date	—
Expiry date	Feb 18, 2029

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE02D29/1427
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A swing-out manhole cover assembly having at least one ramp to facilitate opening and closing the cover. The manhole cover assembly includes a frame, a cover, a swing assembly and at least one ramp. As the cover swings open away from the frame about the swing assembly, the ramp imparts linear translation to the cover separating the cover from the frame slightly. As the cover swings back to close the manhole cover, the ramp reverses the linear translation and the cover returns back to the frame. A spring may be included to bias the cover in the closed position.

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