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:
Dec. 26, 1978
Filed:
Apr. 28, 1977
William J Gerstenmaier, Salisbury, MD (US);
John A Todd, Salisbury, MD (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
A system and method for detecting leaks in an underground piping network supplying liquid petroleum products pumped from an underground storage tank to an aboveground dispenser outlet. A highly sensitive flow detector situated in a parallel looped bypass arrangement is selectively operated for ascertaining existence or non-existence of a piping leak. Following a sufficient time lapse of non-dispensing for enabling temperature stabilization of the piping network to occur, the detector is actuated in a controlled sequence of go, no-go steps that culminates in ascertaining existence or non-existence of a piping leak while at the same time eliminating any false indication occasioned by detector malfunction.