US Patent:
20070274779, Nov 29, 2007
Inventors:
Jeremy Johnson - East Jordan MI, US
Lee Veldboom - East Jordan MI, US
Scott Beal - East Jordan MI, US
Herbert Barnum - East Jordan MI, US
William Austin - Ellsworth MI, US
James Malpass - East Jordan MI, US
Todd Loviska - East Jordan MI, US
Brian Rachwitz - East Jordan MI, US
Rex Garringer - Ardmore OK, US
John Snyder - Boyne City MI, US
Assignee:
EAST JORDAN IRON WORKS, INC. - East Jordan MI
International Classification:
E02D 29/14
Abstract:
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.
