U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Supplemental emission control device for a gasoline engine

Patent 5313926 Issued on May 24, 1994. Estimated Expiration Date: Icon_subject May 7, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

2876757

3463132

Combustion control system for adding fluid above the butterfly valve
Patent #: 4112892
Issued on: 09/12/1978
Inventor: Lindberg

Apparatus for removing contaminants from crankcase emissions
Patent #: 4370971
Issued on: 02/01/1983
Inventor: Bush

Fuel-air control device Patent #: 4483309
Issued on: 11/20/1984
Inventor: Norman ,   et al.

Inventor

Application

No. 057815 filed on 05/07/1993

US Classes:

123/587Oxidant controlled by intake manifold vacuum

Examiners

Primary: Kamen, Noah P.

Attorney, Agent or Firm

International Class

F02M 023/00

Abstract

A supplemental emission control device for a gasoline engine utilizes the vacuum suction of the venturi of the carburetor or the air intake manifold to draw ambient air through a filter sponge and a piston control chamber into the combustion chamber of a gasoline engine to mix with the fuel therein to form a uniform fuel mixture for a complete and efficient combustion. A regulating screw is provided to regulate the flow rate of the ambient air into the combustion chamber.

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