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:
Sep. 03, 1985
Filed:
Jul. 06, 1984
Harry J Ledgerwood, Marshfield, MO (US);
Plessey Incorporated, Los Angeles, CA (US);
Abstract
A pipe joint coupling for joining cast iron hubless drain and vent pipes. The joint is encircled by an annular elastic gasket fitting over each end of the adjacent pipe sections. The elastic gasket is surrounded by a shield with a diamond pattern of projections and depressions. The shield is tightened by bands to compress the gasket against the pipes and to secure the adjacent ends of the pipes together. A tight seal is formed between the gasket and the pipe ends which is maintained under high pressure fluid passing through the pipes. The gasket is prevented from extruding from the shield by the gripping of the projections of the diamond pattern of the shield on the gasket. An improved seal between the pipes being joined is formed with increased resistant to the displacement of the gasket.