Torque wrench

Details Torque wrench Torque wrench

1976-10-06

1978-03-21

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

B25B 2314

Patent

active

040796396

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.

REFERENCES:
patent: 2732747 (1956-01-01), Livermont
patent: 2743638 (1956-05-01), Woods
patent: 2900855 (1959-08-01), VanHoose
patent: 3608403 (1971-09-01), Green
patent: 3763724 (1973-10-01), Green

Affiliated with

Also associated with

Rating

Torque wrench does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Torque wrench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torque wrench will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-565237