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. 27, 1994
Filed:
Aug. 31, 1993
Applicant:
Inventor:
James C Swain, Columbus, OH (US);
Assignee:
Gas Research Institute, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02N / ;
U.S. Cl.
CPC ...
1231821 ;
Abstract
Apparatus and methods are provided for relieving the compression pressure while starting an internal combustion engine 10. A passage 12 communicates via end openings 22 and 22a between the compression space 13 and the exhaust region 19 in the head 20 of the engine. A spring 16 presses against one side of a piston 15 in a valve 21, holding an end portion 23 away from the opening 22 until the engine speed exceeds the cranking speed. The pressure of the engine's lubricating oil 18 on the opposite side of the piston 15 then forces the end portion 23 against the opening 22, to close the passage 12 and permit the engine to continue running with full compression.