Concrete tunnel for a rapid transit train

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Description

FIG. 1 is a perspective view of a concrete tunnel for a rapid transit train and showing my new design, with a middle portion broken away to disclose indefinite length; and,

FIG. 2 is an end view thereof.

Claims

The ornamental design of a concrete tunnel for a rapid transit train, as shown and described.

Referenced Cited
U.S. Patent Documents
4993872 February 19, 1991 Lockwood
5252002 October 12, 1993 Day
D454203 March 5, 2002 Bellavance
Other references
  • Bebo Arch System, Zurn Industries, Inc., 1982.
Patent History
Patent number: D484610
Type: Grant
Filed: Feb 12, 2003
Date of Patent: Dec 30, 2003
Assignee: Con/Span Bridge Systems Ltd. (Dayton, OH)
Inventor: William D. Lockwood (Dayton, OH)
Primary Examiner: Doris Clark
Attorney, Agent or Law Firm: Jacox, Meckstroth & Jenkins
Application Number: 29/175,887
Classifications
Current U.S. Class: Structure (D25/1)
International Classification: 2503;