The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 1992
Filed:
Jun. 14, 1991
Jacky Naudin, Metz-Vallieres, FR;
Jacques Michon, Paris, FR;
Valeo, Paris, FR;
Abstract
A damped double flywheel, in particular for a motor vehicle, comprises two coaxial inertia masses which are mounted for rotation with respect to each other against the action of springs and a viscous damper. The viscous damper comprises a sealed cavity bounded by two cover plates which are joined together through a spacer element. The viscous damper also includes first teeth directed radially inwards and alternating with second teeth which are directed radially outwardly. At least one of the cover members is provided with a recess in the face of the cover member which cooperates with the said second teeth, with the recess facing the latter and being so positioned as to lie against the corresponding tooth during normal operation, but not when the engine is being started or stopped, so that the viscous damper can operate to full effect under these latter conditions.