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. 18, 2004
Filed:
Feb. 28, 2003
Applicant:
Inventors:
Jeffry Marvin Leffel, Wixom, MI (US);
Gregory Scott Green, Dearborn, MI (US);
Assignee:
Visteon Global Technologies, Inc., Dearborn, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M 3/304 ;
U.S. Cl.
CPC ...
F02M 3/304 ;
Abstract
An air induction system for an internal combustion engine comprises an air intake tube and a thermal pump coupled to the air intake tube. The thermal pump comprises a bladder that defines a variable volume gas chamber. Following engine operation, the bladder is inflated to draw air containing hydrocarbon vapors from the air intake tube and prevent their escape into the atmosphere. A preferred mechanism for the thermal pump comprises bimetallic springs that expand and contract in response to changes in temperature to inflate and deflate the bladder.