LOCKING MANHOLE COVERS MADE

Brand Owner Address Description
ROTOLOC Stadler, David M. 28421 Santa Barbara Lathrup Village MI 48076 Locking manhole covers made of metal;ROTOR LOCK;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. 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.