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:
Jul. 16, 2002
Filed:
Dec. 08, 2000
Michael Peter Binno, Troy, MI (US);
Meritor Suspension Systems Company, Troy, MI (US);
Abstract
An autofrettage process employed on the inner surface of a tubular stabilizer bar. Road shock and other vibrations subject the stabilizer bar to tensile stresses. Tensile stresses cause fractures and decrease the fatigue life of the bar. In employing an autofrettage process, a pressurized fluid is introduced into the interior space of a sealed stabilizer bar, slightly increasing the inner diameter of the stabilizer bar. As the inner surface of the stabilizer bar is deformed, residual compressive stress forces are created which counteract and oppose the tensile stress forces. The residual compressive stress forces prevent the tensile stresses from fracturing the inner surface of the bar, increasing fatigue life. A shot peening process can be employed on the exterior surface of the bar to create residual compressive stress forces which counteract exterior tensile forces.