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:
Jun. 07, 1988
Filed:
May. 19, 1986
Applicant:
Inventors:
Joseph Sehnal, Hoffman Estates, IL (US);
Leonard B Mednick, Skokie, IL (US);
Assignee:
John Crane-Houdaille, Inc., Morton Grove, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277 88 ; 277200 ; 277 / ;
Abstract
A rotary mechanical seal with metal bellows having reinforced weld joints. The bellows is formed of a plurality of adjacent annular discs or diaphragms having inner and outer circumferences welded together. A plurality of annular reinforcing rings are provided, each being associated with the welded joint at one circumference of the diaphragms. The associated rings and the circumferences define a weld area. The presence of the reinforcing rings allows for larger and stronger welds along the associated circumferences, which increases the capacity of the seal to withstand operating pressures.