Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work
Patent
1995-07-17
1996-09-24
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Responsive to torque on work
81 63, 7386223, 7386227, B25B 23142
Patent
active
055579949
ABSTRACT:
An adjustable torque ratchet wrench has a ratchet gear to be meshed with a ratchet pawl that restrains movement of the ratchet gear when a handle is rotated. The ratchet gear includes a shaft connected to a removeable fitting for engaging a bolt or the like to be tightened. The ratchet pawl is mounted on a moveable ratchet pawl block. The ratchet pawl block and the ratchet pawl are urged toward the ratchet gear by an adjustable spring assembly. The user selects a limiting torque using an adjustment means. When the limiting torque is achieved, the force of the spring is overcome and the ratchet pawl disengages from the ratchet gear as the ratchet pawl block slides in the direction of the spring. No further tightening of the bolt may then take place. Embodiments disclosed use varied spring types including disc springs, flat springs, coil springs, loop springs and a series of flat, overlapping springs.
An embodiment having a piezoelectric element for detecting the amount of torque and transmitting the value as an electrical signal to assist the operator in knowing how much torque has been applied. A display provides real time monitoring of the tightening process.
REFERENCES:
patent: 5224403 (1993-07-01), Rueb
Meier Harold E.
Smith James G.
LandOfFree
Ratchet handle with torque adjustment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ratchet handle with torque adjustment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ratchet handle with torque adjustment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1921812