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:
May. 29, 1979
Filed:
Feb. 15, 1978
Carl H Hafele, 4050 Monchen-Gladbach, DE;
Other;
Abstract
The stuffing box chamber in a fitting, particularly a valve, contains a deformable stuffing box seal. The seal includes conventional sealing material and a constituent material such as zinc or aluminum having a standard potential that is less positive in the electrochemical potential series than the potential of the material defining the stuffing box chamber, i.e., the constituent material is less precious. Dust, granules or filaments of less precious material are mixed with the standard sealing material. Another embodiment includes alternating layers of discs made from the conventional and less precious materials. A further embodiment provides that the less precious material is an envelope or coating surrounding the conventional sealing material.