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. 30, 1990
Filed:
Aug. 04, 1988
Roger E Koepsel, Oshkosh, WI (US);
Ronald M Steiner, Oshkosh, WI (US);
Brunswick Corporation, Skokie, IL (US);
Abstract
A marine propulsion system in which exhaust is routed through an internal exhaust passage which includes a convergent area forming a restricted flow path includes a pressure relief opening formed adjacent the area of restricted exhaust flow for relieving exhaust pressure. One or more closure plates are connected adjacent the one or more openings to selectively control the passage of exhaust therethrough. The plates are biased toward a closed position in which exhaust is prevented from passing through the openings. The bias on the plates is designed so as to yield to a predetermined level of exhaust pressure within the exhaust passage at the area of restricted exhaust flow, to thereby relieve exhaust pressure build-up and improve the performance of the marine propulsion system.