Torque control device and valve timing control apparatus

Patent metadata

Field	Value
Publication number	US-9200545-B2
Application number	US-201414459604-A
Country	US
Kind code	B2
Filing date	Aug 14, 2014
Priority date	Aug 27, 2013
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A torque control device includes a seal structure sealing a clearance between a hollow object and a rotation shaft. The seal structure includes a particle seal, a liquid seal, an intermediate fluid which fills a middle chamber defined between the particle seal and the liquid seal, and a coating film having a hardness higher than that of magnetic particle. The coating film is arranged to at least at a seal perimeter part of the rotation shaft, and a seal gap is defined between the particle seal and the seal perimeter part.

First claim

What is claimed is:

1. A torque control device comprising:
a hollow object in which a fluid chamber is defined;
a functional fluid in which a magnetic particle is suspended in a base liquid, the fluid chamber being filled with the functional fluid;
a viscosity control portion variably controlling a viscosity of the functional fluid by causing a magnetic flux to pass through the functional fluid in the fluid chamber;
an adjustment rotor having a rotation shaft which passes th…

Assignees

• Denso Corp

Inventors

• Washino Seiichiro
• Furukawa Takashi

Classifications

• F16F9/53

  Mechanical Engineering · mapped topic

• F01L1/352

  Mechanical Engineering · mapped topic

• F01L1/34409 Primary

  Mechanical Engineering · mapped topic

• F01L2001/34479

  Mechanical Engineering · mapped topic

• F16D57/002

  Mechanical Engineering · mapped topic