Torque wrench system having multiple torque stations

US8020626B2 · kind B2 · utility

Assignee

• DALE FRANCIS · US

Inventors

• Dale Francis · Luling, US
• Nicholas Francis · Luling, US
• William P. Bernard · Westerville, US
• Oswald J. Bernard · Luling, US
• Lan Hiscox · Houston, US
• Brian Compton · San Diego, US
• Arthur A. Jones · Ocala, US

Key dates

• Filing date: May 4, 2009
• Grant date: Sep 20, 2011
• Expiry date: Feb 7, 2030

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B19/165
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

An improved multi-bolt and nut torque wrench for installing and removing bolts or nuts from flanged joints or the like which includes a plurality of torque stations having a plurality of high torque wrenches for engaging the heads of the bolts or nuts during a high torque phase of removal or installation; a plurality of low-torque motors operatively engaged with the wrenches for rotating the bolts or nuts during the low torque phase of removal or installation; a source of hydraulic fluid for driving the low-torque motors during the low-torque phase, and driving the high-torque wrenches during the high torque phase; and a mechanism for switching between the two phases depending on the torque needed.