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US 5,177,962 AGranted
External spark arrestor
AssigneeTecumseh Products Company
InventorsRonald L. Hall, Oliver L. Greuel
Life of this patent
Estimating the term…
Abstract
An external spark arrestor assembly attached directly to the outer shell of a muffler of an internal combustion engine. The assembly includes a spark arresting screen disposed over the exhaust port of the muffler and forming a first exhaust-receiving conduit between the screen and the muffler; an outer perforated cover disposed over the screen and forming a second exhaust-receiving conduit between the screen and the outer cover; and a single centrally located fastener for removably fastening the screen and outer cover to the muffler shell.
Claims10
An internal combustion engine comprising:
- an exhaust system including a muffler having an outer shell and an exhaust port for the discharge of exhaust gases from said muffler;
- a spark arresting screen disposed over said exhaust port, said screen including an outer peripheral lip portion;
- and
- an outer perforated cover disposed over said spark arresting screen, said outer cover having a peripheral edge portion;
- said screen and said cover being secured to said outer shell by a single fastener, said outer edge engaging and biasing said outer lip against said outer shell sufficiently to inhibit the discharge of exhaust gases between said outer shell and said lip portion.
2 more elements
Dependencies are inferred from the claim text.