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:
Mar. 21, 1978
Filed:
Oct. 06, 1976
Harold Leslie Wood, Footscray, AU;
Repco Limited, , AU;
Abstract
A torque wrench of the 'break' type in which the handle moves relative to the workhead when the preselected tension has been reached, thereby providing a signal which can be felt by the user. The handle is pivotally connected to the workhead, and a tension control mechanism acts between the handle and workhead to prevent pivotal movement of the handle in one direction relative to the workhead until the preselected tension has been reached. The tension control mechanism is adjustable to allow variation of the 'break torque,' and includes a lever which is pivotally connected to the workhead and coacts with a reaction member connected to the handle. A spring influenced plunger acts on the lever through a toggle bar to hold the lever in an operative position, at which position the handle is held against pivotal movement relative to the workhead, and the toggle bar has its longitudinal axis at an angle to the longitudinal axis of the plunger. When the preselected tension is reached the lever swings about its pivot causing the toggle bar to move closer towards axial alignment with the plunger thereby reducing resistance to pivotal movement of the handle relative to the workhead. Adjustment of the preselected tension is achieved by altering the position of engagement between the lever and reaction member relative to the pivotal axis of the lever.