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:
Oct. 09, 2001
Filed:
May. 30, 2000
Applicant:
Inventor:
Calvin Derr, Chicago, IL (US);
Assignee:
Illinois Tool Works Inc., Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16F 9/12 ; F16D 5/700 ;
U.S. Cl.
CPC ...
F16F 9/12 ; F16D 5/700 ;
Abstract
The viscous damper is formed with a body with a cylindrical wall presenting an edge with a circular tongue element thereon. A cap with a corresponding circular groove element is placed thereon so that the tongue and groove elements align with each other. The resulting tongue and groove configuration is ultrasonically welded thereby forming a hermetic seal. This particularly results in a very precise damper height which is important for small or miniature dampers.