Patent Number: 6,296,415

Title: CAM type hub and strut for use in portable and semi-permanent structures

Abstract: A cam style hub and strut system for use in single panel fabric, cloth, or plastic units, or structures with an unlimited number of wall and/or roof panels. The purpose of the cam style hub is to compensate for certain fabric characteristics and to allow easier setup of structures containing flexible or rigid support struts connected to a central hub by lessening the distance of the diametrically opposing struts during assembly, and applying the force necessary to engage the self-supporting structure by engaging the cam, increasing the distance between the ends of the opposing struts. The amount the distance is increased can be dictated by materials used and the size of the panel. The hub may contain an optional "locking" feature activated when the hub cam is engaged for convenience and safety reasons. The principle can be used with any number of struts greater than one.

Inventors: Johnson; Brooks E. (Becker, MN), Beam; Keith J. (Brooklyn Park, MN)

Assignee: Double Bull Archery, LLC

International Classification: E01F 9/012 (20060101); E01F 9/011 (20060101); E04B 1/344 (20060101); E04H 15/48 (20060101); E04H 15/34 (20060101); E04H 015/00 ()

Expiration Date: 10/02/2018