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:
Aug. 12, 1997
Filed:
Jan. 18, 1996
Jeffrey S Gambrill, Hilton, NY (US);
Larry G Porter, Marion, NY (US);
Robert A Stolpman, Scottsville, NY (US);
General Signal Corp., Rochester, NY (US);
Abstract
A mixer seal assembly for a closable vessel having a dynamic mixer shaft seal in a bore in a vessel flange and a static seal for vessel transport formable by insertion of a disconnected lower portion of a fast connect coupling which is fast to install on the mixer shaft into the flange bore above the dynamic seal. The resulting seal assembly can seal the vessel for over-the-road transport. The dynamic seal includes a circular lip which sealingly engages the surface of the mixer shaft. The static seal includes an O-ring disposed in a first annular groove in the coupling portion. A shaft bushing disposed adjacent to the shaft seal in the flange bore minimizes shaft runout in the shaft seal and permits use of relatively rigid and dry running materials such as fluorocarbon polymer in the shaft seal. In the shut-off position with the coupling portion inserted into the vessel flange, a spring pin mounted in the vessel flange can engage a second annular groove in the coupling portion to lock the coupling portion in the flange bore. In an alternative embodiment for use in retro-fitting existing vessels, the vessel flange of the invention may be configured to sealingly conform to an existing vessel flange.