Torque wrench with torque range indicator and system and method employing the same

• US 7,089,834 B2
• Filed: 04/07/2004
• Issued: 08/15/2006
• Est. Priority Date: 04/07/2004
• Status: Active Grant

• Current Assignee: Ryeson Corporation (Snap-On Incorporated)
• Original Assignee: Ryeson Corporation (Snap-On Incorporated)
• Inventors: Gauthier, Jerome M., Reynertson, John
• Primary Examiner(s): Thomas, David B.
• Application Number:
  US10/819,628
• Publication Number:
  US 20050223857A1
• Time in Patent Office: 860 Days
• Field of Search: 814/79, 814/83, 738/47, 738/620.8, 738/622.1, 738/622.3, 738/622.6
• US Class Current: 81/479
• CPC Class Codes: B25B 23/14 Arrangement of torque limiters or torque indicators in wrenches or screwdrivers couplings for transmitting rotation or clutches F16D; devices for measuring torque per se G01L
• CPC Class Codes: B25B 23/1425 by electrical means

Abstract

A torque wrench is disclosed having torque range indicators. The torque wrench includes a handle, a torquing tool, a mounting bar and a programmable interface module. At least one torque sensor is communicatively coupled to the interface module. The interface module includes an input device able to receive at least one predetermined torque value, a torque value indicator, a torque range indicator, and a controller. The torque value indicator, the torque sensor, and the torque range indicator are communicatively coupled to the controller, and the controller is programmed to activate the torque range indicator based on a torque range calculated by comparing a torque value received from the torque sensor to the at least one predetermined torque value.

Claims

1. A torque wrench, comprising:

a handle;

a torquing tool operatively associated with the handle;

a torque sensor operatively associated with the torquing tool; and

a programmable interface module having a torque range indicator, a torque value indicator and a controller, wherein the torque sensor, the torque value indicator and the torque range indicator are communicably coupled to the controller, the controller being programmed to activate the torque range indicator based on a torque value received from the torque sensor and a predetermined torque value, wherein the torque range indicator is a backlight that backlights the torque value indicator on the display screen and changes color dependent on the torque range, such that a user can vary an amount of torque on the wrench according to the torque range.

2. The torque wrench of claim 1, wherein the torque range indicator further includes an audio output.

3. The torque wrench of claim 1, wherein the backlight is at least one of a yellow, green, and red color.

4. The torque wrench of claim 1, wherein the controller is communicably coupled to a second controller.

5. The torque wrench of claim 1, wherein the torque range indicator is activated by a torque value that is too low based on the predetermined torque value.

6. The torque wrench of claim 1, wherein the torque range indicator is activated by a torque value that is acceptable based on the predetermined torque value.

7. The torque wrench of claim 1, wherein the torque range indicator is activated by a torque value that is too high based on the predetermined torque value.

8. The torque wrench of claim 1, wherein the display screen includes a liquid crystal display screen.

9. The torque wrench of claim 1, further including an input device communicably coupled to the controller for entering the predetermined torque value.

10. The torque wrench of claim 1, wherein the torque value indicator is a numerical digital display of the torque value received from the torque sensor.

11. The torque wrench of claim 1, wherein the controller is programmed to activate the torque range indicator if the torque value is within a predetermined percentage of a predetermined torque value.

12. The torque wrench of claim 11, wherein the controller is programmed to activate a low torque range indicator if the torque value is below 95 percent of the predetermined torque value.

13. The torque wrench of claim 11, wherein the controller is programmed to activate a high torque range indicator if the torque value is above 105 percent of the predetermined torque value.

14. The torque wrench of claim 1, wherein the controller is programmed to activate the torque range indicator if the torque value is within a predetermined numerical range of a predetermined torque value.