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:
Jan. 09, 1990
Filed:
Nov. 19, 1987
Peter W Brown, Hartland, WI (US);
Outboard Marine Corporation, Waukegan, IL (US);
Abstract
Disclosed herein is an internal combustion engine comprising first and second cylinders, first and second crankcases extending respectively from the first and second cylinders, a crankshaft extending through the first and second crankcases, first and second pistons connected to the crankshaft to afford opposite action of the pistons and respectively reciprocally movable in the first and second cylinders to define first and second combustion chambers respectively communicable, subject to piston movement, with the first and second crankcases, first and second air induction passages respectively including first and second reed valves for respectively supplying air to the first and second crankcases, a duct extending between the first and second crankcases, and a valve located in the duct and movable between open and closed positions to respectively permit and prevent fluid flow between the first and second crankcases.