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:
Mar. 06, 2000
Filed:
Sep. 08, 1999
Gerald P Simmons, Morton, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A system and apparatus for evacuating air from an at least partially enclosed space around an internal combustion engine including an exhaust pipe for the flow of combustion products to atmosphere. The present system and apparatus includes a shaft and structure for mounting the shaft to the exhaust pipe in the exhaust path, and an impeller mountable for rotation on the shaft, the impeller including a first rotor having at least one vane or blade positioned in the exhaust path and oriented so as to be rotatably driven by the flow of combustion products, and a second rotor connected in rotatably driven communication to the first rotor, the second rotor including at least one vane or blade positioned and oriented for propelling air within the enclosure for evacuating the air therefrom.