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:
Feb. 18, 1992
Filed:
Aug. 17, 1990
Nicholas M Gralenski, Santa Cruz County, CA (US);
Watkins Johnson Company, Palo Alto, CA (US);
Abstract
An electrically insulating pipe coupling assembly for electrically isolating pipe sections to which an electric current is applied. The apparatus includes first and second extension members formed having an integral flange with a protruding annular sealing bead at one end and adapted for attachment to a section of pipe at the other end. An insulating sleeve having an insulating flange is mounted on the first extension member. A nonconductive spacer is positioned between the opposing integral flanges to receive the annular sealing beads, separating and electrically isolating the first and second extension members. A first coupling member is slidably mounted on the insulating sleeve, while a second coupling member is slidably mounted on the second extension member. The coupling members, when secured together, force the annular sealing beads into compressive contact with the nonconductive spacer.