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:
Oct. 05, 1976
Filed:
Jun. 03, 1975
Allen M Bower, Conneaut, OH (US);
Emco Wheaton Inc., Conneaut, OH (US);
Abstract
In a liquid storage tank such as an underground storage tank for liquid fuels having a liquid input passage and a vent passage, the improvement of vapor recovery passage means opening outwardly from the tank and connectible to an external vapor recovery system, the vapor recovery passage being blocked by liquid flow when the level of liquid in the tank rises above a predetermined level to prevent the discharge of vapor therethrough, signal means communicating with the vent passage means and operative in response to an increase in pressure in the vent line caused by the blockage of the vapor recovery line during the filling of the tank to provide a signal indicating that the tank has been filled to a predetermined level.