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:
Jul. 24, 1990
Filed:
Nov. 13, 1986
James L Dennison, Los Gatos, CA (US);
Other;
Abstract
An induction loop and a method of making an induction loop having conduit sections connected by a coupling assembly. The coupling assembly includes a passageway-defining body having ends for receiving sections of conduit. An intermediate body portion includes an opening exposing an intermediate passageway exteriorly. A lid for sealingly covering the opening includes an extension placeable into the opening for mating engagement with corresponding wall portions of the coupling body. The body and lid provide lateral external-pressure-withstanding structure to prevent damage to the assembled loop by absorbing regional pressures. This structure also provides for internal-pressure-withstanding sealing between the two so that, after completion of insertion of conductor in the conduit loop, the conduit may be injected under increased pressure with a heated rubberized asphalt sealant which is flexible at ambient conditions. Flexible joints in the form of short flexible conduit portions are inserted between the coupling body and the relatively rigid conduit section to permit angular displacement of the body relative to the section.