Torquemeter

Details Torquemeter Torquemeter

1984-11-23

1986-10-14

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

73DIG2, G01L 310

Patent

active

046165126

ABSTRACT:
A nonintrusive, or noncontact, shaft torquemeter for use in measuring torque transmission through a rotatable shaft. The torquemeter includes an annular torque-sensing coil structure having an annular excitation coil and a pickup coil magnetically coupled to the excitation coil through an improved magnetostrictive coupling structure carried by the shaft. In the illustrated embodiment, the magnetostrictive coupling portion is provided on a tube coaxially fixed at its ends to the shaft. The invention comprehends the provision of structure for preventing a continuous annular conductive path through the coupling portion or tube. Other structure for improving torque measuring accuracy may be provided, including the use of an outer magnetic stator core, and the provision of annular corrugations in the tube for preventing transmission of nontorque forces, such as bending forces, to the coupling portion. In one embodiment, the coupling portion is defined by a portion of the mounting tube, and in another embodiment, the coupling portion is defined by a layer of magnetostrictive material on the tube.

REFERENCES:
patent: Re26501 (1968-12-01), Himmelstein et al.
patent: Re28899 (1976-07-01), Himmelstein et al.
patent: 3441886 (1969-04-01), Tveter
patent: 3501950 (1970-03-01), Hohenberg
patent: 3531748 (1970-09-01), Tveter et al.
patent: 3531749 (1970-09-01), Tveter et al.
patent: 3717029 (1973-02-01), Tveter
patent: 3800591 (1974-04-01), Tveter
patent: 3827506 (1974-08-01), Himmelstein et al.
patent: 3861206 (1975-01-01), Kawafune et al.
patent: 3961525 (1976-06-01), Himmelstein
patent: 4142591 (1979-03-01), Himmelstein
patent: 4320463 (1982-03-01), Himmelstein
patent: 4364278 (1982-12-01), Horter et al.
patent: 4381684 (1983-05-01), Himmelstein
patent: 4412198 (1983-10-01), Reich
patent: 4506554 (1985-03-01), Blomkvist et al.
patent: 4563905 (1986-01-01), Himmelstein

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1334284