The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1992
Filed:
Apr. 05, 1991
Donald M Townsend, Mill Valley, CA (US);
Simpson Dura Vent Company, Inc., San Leandro, CA (US);
Abstract
A combination of metallurgical and vent engineering design solutions that result in a superior product, lower installed cost, and corrosion-free performance for venting modern fan-assisted gas appliances by using a flexible, compressible, corrugated gas vent connector. Preferably the connector is constructed from a material having a heat conductivity substantially equal to or greater than aluminum. Other forms of the invention include the use of stainless steel; a double wall corrugated wall in the flex section; and the use of flat flex in the corrugated section. By providing the flex connector with twist lock couplings the connector may be assembled in the field more quickly with a greater assurance of its integrity under adverse conditions such as earthquakes or other building moving conditions.