U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Portable structure

Patent 3990463 Issued on November 9, 1976. Estimated Expiration Date: Icon_subject November 9, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3675667

Inventor

Application

No. 623547 filed on 10/17/1975

US Classes:

135/126, Collapsible as a unit135/905, METHOD OF ERECTING SHELTER135/93Ventilating

Examiners

Primary: Schroeder, Werner H.
Assistant: Berman, Conrad L.

Abstract

Disclosed is a portable structure having principal utility as a tent. The support for the structure comprises a continuous loop of a flexible, coilable, resilient material such as flat spring steel stock. The support is secured to the fabric of the structure at at least a plurality of points and preferably is continuously held thereto in an elongate pocket. In use, the support is restrained by and supports the fabric and is held in a "figure-eight" configuration with the cross-over of the figure eight as the apex of the structure and the loops of the figure eight extending downwardly therefrom and where most remote are at the base of the structure thereby providing a measure of support for the structure. The support provided by the frame alone is substantially increased by the co-action of the body of the structure which, in use, provides additional lateral stability to the structure and puts the frame in compression thereby considerably increasing its rigidity. The frame member, being flexible and coilable can be readily collapsed and stored when the structure is not in use.

PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
PatentsPlus: add to cart
PatentsPlus: add to cartIntelligent turbocharged patent PDFs with marked up images
$16.95more info
 
Sign InRegister
Username  
Password   
forgot password?