INCH POUNDS PER TURN (IPPT) COMPUTING DEVICE FOR GARAGE DOORS

摘要

Disclosed is an inch pounds per turn (IPPT) computing device that provides for the calculation of IPPT of a garage door spring coil. The IPPT computing device computes the IPPT required of the garage door spring coil by measuring the strain induced on a calibrated shaft used to lift the weight of the garage door. The IPPT computing device is inserted into the winding end cone of a garage door torsion spring assembly, and the door is slightly lifted off of the floor. This measurement is done by disabling the cable ends spring end so the counterbalance force is removed from the door. The IPPT tool measures the torque (strain on the calibrated rod) needed to lift the door and inputs the torque value automatically into an IPPT calculator mounted on the tool. When other door parameters are entered into the calculator, the IPPT is calculated.

主权项

1. An inch pound per turn (IPPT) computing device for a garage door spring coil, the IPPT computing device comprising:
a shaft; a strain gauge coupled to the shaft; and a calculator unit mechanically coupled to the shaft and communicatively coupled to the strain gauge; wherein the calculator unit computes an inch pounds per turn (IPPT) value required for the garage door spring coil in response to receiving a strain measurement from the strain gauge.