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:
Apr. 20, 2010
Filed:
Jun. 23, 2008
Anatoly Efremov, Albuquerque, NM (US);
Anatoly Efremov, Albuquerque, NM (US);
Other;
Abstract
A Bolted Flanged Connection (BFC) includes 'negative creep' bolts with cores manufactured from Shape Memory Alloy (SMA) and 'negative creep' gasket manufactured from the same SMA. The gasket is shape-memorized to the “swelling”, and bolt cores are shape-memorized to the compression. Temperature interval of reverse martensitic phase transformation of SMA is close to operational temperature interval of the assembly. The constrained shape recovery of the gasket and bolt cores is combined with inverse flexion flange design that constitutes original type of BFC with feature to inhibit flange rotation and creep of bolts and gasket under conditions of a variety of operational temperatures and internal pressures. Presented type of BFC allows increasing significantly internal pressure and leak tightness providing safe and extended service life of pressure vessels and plant/piping systems used in aerospace, submarine shipbuilding, petroleum refining, petrochemicals, fossil fuel and nuclear power generation, and other industries.