East Jordan Iron Works, Inc.

Lee M Veldboom

Jeremy I Johnson

Kevin S Vrondran

Scott B Beal

Brian J Rachwitz

Todd C Loviska

Rex A Garringer

Herbert Carl Barnum

John H Snyder

William R Austin

James F Malpass

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.

Swing-out manhole cover

A lift-assisted manhole cover assembly with a flush surface and external pivot shaft. The cover includes a mounting tab that extends beyond the general periphery of the cover. The mounting tab may be connected to a shaft that is threadedly engaged with the frame. A spring may be mounted between the frame and the mounting tab, for example, in a sleeve, to provide a mechanical assist in lifting the cover. The sleeve may be disposed outside the manhole opening where it does not block access to the manhole opening.

Lift-assisted manhole cover

Growing community of inventors

East Jordan, MI, United States of America

Lee M Veldboom