Ultra lightweight segmented ladder/bridge system

Patent No. 8,448,748

Issued: May 28, 2013
Filed:  December 23, 2009
Term Extension: 537 days

Inventors: Allred, III; Jimmie B. (Skaneateles, NY), Kummer; Joseph (Fayetteville, NY), Griswold; Michael D. (Syracuse, NY), Hall; Michael J. (Camillus, NY), Bush; Matthew A. (LaFayette, NY)
Assignee: Allred & Associates, Inc. (Elbridge, NY)


A dual-use ladder and bridge modular system preferably includes tubes, gussets, flanges, and/or joints. In a preferred embodiment, the tubes, gussets, flanges, and/or joints are made of carbon fiber. A method connects and disconnects modular carbon fiber ladder segments. Another method creates a lightweight carbon-fiber beam with exceptionally high stiffness and strength using a combination of carbon-fiber braid material, uni-directional cloth, and pultruded carbon-fiber strips. A carbon fiber ladder segment and tube connectors are also disclosed.

Reference to Related Applications

This application claims one or more inventions which were disclosed in Provisional Application No. 61/141,402, filed Dec. 30, 2008, entitled "DUAL-USE MODULAR CARBON-FIBER LADDER AND BRIDGE" and Provisional Application No. 61/151,327, filed Feb. 10, 2009, entitled "ULTRA LIGHTWEIGHT SEGMENTED LADDER/BRIDGE SYSTEM". The benefit under 35 USC .sctn.119(e) of the United States provisional applications is hereby claimed, and the aforementioned applications are hereby incorporated herein by reference.


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