Back to results
US 12,752,403 B2Granted
Torque wrench limit switch assembly
AssigneeStanley Black & Decker MEA FZE
InventorsYen-Ting Wu, Ko Han Chen, Chia Cheng Chen, Yi Tung Chan, ChihChiang Lee
Life of this patent
Estimating the term…
Abstract
The present invention discloses a limit switch assembly for use with a digital torque wrench. The limit switch assembly is configured to prevents the micro-controller from displaying undesired jumps in real-time torque measurements. The limit switch assembly includes a housing, actuator that is movable between a first and second position and a biasing element that biases the actuator toward its first position.
Claims14
A limit switch assembly for use with a digital torque wrench comprising:
- a loadcell configured to measure force and a micro-controller configured to receive signals from the loadcell, convert the measured force into a corresponding torque, and display the torque, said limit switch assembly further comprising:
- a limit switch housing;
- an actuator disposed within the limit switch housing and movable between a first position and a second position;
- a biasing element that biases the actuator toward its first position;
- and
- wherein when the actuator is in its first position, the micro-controller will continually read the signals received from the loadcell and display the corresponding torque setting, and when the actuator is moved to its second position, the micro-controller marks the last received force measurement as Fset and marks the corresponding torque as Tset;
- thereafter when the actuator is in the second position, and the digital torque wrench is used to apply torque to a work piece, force is applied to the loadcell and marked by the micro-controller as F1, which is converted to the corresponding torque measurement T1 and compared to Tset
- wherein if T1 is less than Tset or within a predetermined range thereof, the micro-controller will display T1, and
- wherein if T1 is greater than Tset and outside the predetermined range, the micro-controller will display Tset.
6 more elements
A digital torque wrench comprising:
- a loadcell configured to measure force;
- a micro-controller configured to receive signals from the loadcell, convert the measured force into a corresponding torque, and display the torque;
- and
- characterized in that the digital torque wrench further comprises a limit switch assembly according to any previous claim.
1 more element
Dependencies are inferred from the claim text.