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. 18, 1979
Filed:
Mar. 17, 1978
Paul R Nau, Wauwatosa, WI (US);
Briggs & Stratton Corporation, Wauwatosa, WI (US);
Abstract
Inside the fuel tank of a small engine liquid fuel system is a buffer chamber that has its interior communicated with the rest of the tank interior only through a small upper air vent and a restricted bottom fuel port. During fueling, fuel enters the buffer chamber slowly and continues to enter it after the tank is apparently full, lowering the fuel level sufficiently to prevent seepage through the tank cap. The engine crankcase is vented to the carburetor air induction passage through a breather check valve in the carburetor body. A first valve, responsive to pressure differences between the atmosphere and the tank interior, vents overpressures in the tank to the crankcase. A second valve, responsive to the difference between tank pressure and subatmospheric cranckcase pressure, admits air to the tank when the engine is running.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile