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:
Mar. 14, 1978
Filed:
Dec. 08, 1976
Abstract
Fuel feeding apparatus is provided for a vehicle heater of the type having a combustion air fan connected by a combustion air feed line to a heater combustion chamber. A venturi tube is arranged in the feed line downstream of the combustion air fan and a fuel feed line and fuel nozzle opens into the air feed line at the venturi tube. A diaphragm pump is provided which has a first chamber, a fuel supply line inlet and an outlet at the fuel feed line to the venturi tube and a second chamber communicated with the air feed line at a position spaced from the venturi tube. A check valve is provided in the fuel feed line and a closure valve is provided at the fuel supply line leading to the first chamber. Movement of the diaphragm in the pumping direction is controlled exclusively by a pressure difference at the venturi tube and at the air feed line upstream of the venturi tube, while the suction stroke is controlled by an electromagnet. Switch means are provided for switching the electromagnet on at the end of the pumping stroke and off at the end of the suction stroke.