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:
Jun. 08, 1999
Filed:
Apr. 17, 1996
Michael C Webb, Chester Springs, PA (US);
Environ Products, Inc., Exton, PA (US);
Abstract
A monitoring device for use with a coaxial pipe or double wall pipe device which provides access to the interstitial region between an inner pipe and an outer pipe which coaxially defines the interstitial region, each pipe having two terminal ends. The inner pipe has at least one terminal end extending from the outer pipe to leave a portion of the outer wall of the inner pipe exposed to thereby expose the interstitial region. A boot is provided for defining a chamber with a larger end snugly fitting the outer pipe, and a small end snugly fitting onto the exposed outer wall of the inner pipe. The boot has an access port communicating with the interior of the chamber to provide access to the interstitial region, where a liquid transfer tube for transferring liquid to such access port on boot is used for supplying a quantity of liquid into the interstitial region, and also having a sensor tube joined to such liquid transfer tube so as to permit discerning of any changes in the liquid level within sensor tube beyond a pre-determined limit(s) with respect to a fixed level.