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:
Oct. 12, 2004
Filed:
Apr. 04, 2002
Jeffrey A. Hallsten, Sacramento, CA (US);
Hallsten Corporation, Sacramento, CA (US);
Abstract
A substantially gas tight cover for an open-top structure such as a tank requires very few fasteners and allows for thermal expansion and contraction movement while still maintaining the nearly complete gas seal. Unique metal extrusions are assembled on-site in a modular system that is easily put together. An important component of the system is a gutter extrusion which includes an elongated gutter and flanges with sealing gaskets for engaging the top surface of the concrete tank rim as well as engaging the inner wall of the tank below the top. At intervals along the gutter strip are hold-down clips that interlock with the gutter extrusion and are secured in the concrete of the tank, spaced back from the tank edge. Fasteners in the inside face of the tank preferably are avoided. Main spanning beams for the tank cover are connected to the gutter extrusions in a way so as to allow for thermal expansion and contraction, without losing the gas seal.