Reactive biasing fasteners

US7462007B2 · kind B2 · utility

Inventors

• Paul Sullivan · Plymouth, US
• Rafael Munoz

Key dates

• Filing date: Jul 14, 2005
• Grant date: Dec 9, 2008
• Expiry date: Feb 17, 2026

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B39/24
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Several embodiments of reactive biasing fasteners utilized in place of jam nuts and Belleville washers, providing for the storage of a pre-load and effectively providing a locking function to prevent unintended loosening of an associated bolt. The embodiments resiliently deform under load to store pre-load or live load energy. Further, the fasteners are adapted to interface with a self-reacting tightening power tool—thereby eliminating or minimizing the need for backup or secondary wrenches. Additionally, several embodiments, through the incorporation of a threaded bore, effectively act to minimize side loading on the portion of a bolt located in the bolt hole of a workpiece when in use. The resilient deformation of the biasing fasteners permits the live load to be stored therein. Accordingly, the risk of loosening of the bolted joint due to exteriorly applied forces such as, but not limited to, vibration and thermal expansion and contraction, is lessened.