04768442 is referenced by 17 patents and cites 13 patents.

Overhead crane apparatus is disclosed incorporating an extruded aluminum alloy rail structure for runway and bridge girder applications. The relatively light weight and low cost rail structure is shaped to provide a trolley passageway protected from the ingress of deleterious substances, and is further contoured to provide a shaped cavity for ready reception of novel clamp means facilitating the imposition of increased loads on existing crane apparatus. The rail structure during the extrusion process may also be formed with fluid passages in the side walls thereof.

Title
Crane apparatus
Application Number
6/914145
Publication Number
4768442
Application Date
October 1, 1986
Publication Date
September 6, 1988
Inventor
John F Miller
Howell
MI, US
Agent
Bertram F Claeboe
Assignee
Phillips
OH, US
IPC
E01B 25/22
View Original Source