Road structure – process – or apparatus – Pavement – Vault cover-closure
Reexamination Certificate
2007-01-23
2007-01-23
Hartmann, Gary (Department: 3671)
Road structure, process, or apparatus
Pavement
Vault cover-closure
C404S025000
Reexamination Certificate
active
10962325
ABSTRACT:
A riser assembly for supporting a manhole cover is placed within a manhole frame for raising the height of the manhole cover to pavement level. The riser assembly includes a circular frame formed of a metal bar and has a locking ring attached thereto which extends vertically downwardly from the frame. A plurality of outwardly projecting tabs are formed in the locking ring and are adapted to engage the manhole frame to prevent upward movement of the riser. An expansion device expands the frame and locking ring outwardly whereby the locking ring abuttingly engages a vertical surface of the manhole frame to assist in locking the riser assembly to the manhole frame.
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Andrews Metal Products, Inc. Sales Flyer, 1 page, date unknown.
American Highway Products, Ltd.
Hartmann Gary
Sand & Sebolt
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