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:
May. 31, 1977
Filed:
Feb. 24, 1975
Abstract
A control device for regulating the amount of collected fuel and purge air which is delivered to the combustion chamber of an internal combustion engine in addition to its usual mixture of combustion air and fuel includes a valve element which is connected for operation in accordance with the pressure conditions of the fuel intake pipe and carburetor of the internal combustion engine to provide a flow rate of the collected fuel and purge air which is proportional to the flow rate of the usual fuel and air mixture. The device includes a valve body having a diaphragm dividing the interior and which carries a needle valve on one side which is adapted to seat in a valve seat of a line connected to the engine inlet. This same side of the diaphragm is also connected to a line which is adapted to receive accumulated or collected vapors, for example, from the fuel tank or the crank case. The opposite side of the diaphragm is biased by a spring to provide an initial closing action on the needle valve but this biasing force may be overcome by the negative pressure which is conducted to this portion of the body chamber by a sensing line which is adapted to be connected to the carburetor at the location of the venturi.