Combined torque measurement and clutch apparatus

Measuring and testing – Dynamometers – Responsive to torque

Reexamination Certificate

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Details

Type

Reexamination Certificate

Status

active

Patent number

07007560

Description

ABSTRACT:
A method of using a magnetic fluid clutch for torque measurement comprises steps of modulating electric current through a coil of the magnetic fluid clutch to maintain a steady-state quasi-solid phase of a magnetic fluid medium contained within the magnetic fluid clutch when the magnetic fluid clutch is clutched to transmit torque from a torque input end of the clutch to a torque output end of the clutch, thereby ensuring that the torque output end rotates in response to the rotation of the torque input end without relative rotational slippage therebetween; and measuring a deflection value associated with the magnetic fluid clutch. The clutch is thereby used as a combined torque measurement and clutch apparatus.

REFERENCES:
patent: 4969545 (1990-11-01), Hayashi
patent: 5167850 (1992-12-01), Shtarkman
patent: 6645108 (2003-11-01), Gradu
patent: 2003/0094053 (2003-05-01), Anderson
patent: 2003/0216209 (2003-11-01), Gradu

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