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:
Oct. 27, 1981
Filed:
Oct. 29, 1979
Applicant:
Inventor:
Ralph M Hoffmann, Eden Prairie, MN (US);
Assignee:
Trochoid Power Corporation, Eden Prairie, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
F01C / ; F01C / ; F01C / ;
U.S. Cl.
CPC ...
418 / ; 418 94 ; 418104 ; 418142 ; 418183 ;
Abstract
A rotary expansion power unit, such as a steam engine, which has a planetating rotor in a housing having an epitrochoidal cavity. In known engines, hot expansion fluid is directed through a hollow interior in the rotor and surrounds the rotor journal bearing. This leads to excessive expansion of the rotor and requires an excessive flow of cooling oil to the bearing. The invention isolates the expansion fluid from the interior of the rotor by having a valve disc fastened to the rotor crankshaft with a first seal means between the valve disc and housing end wall and a second seal means between the valve disc and rotor.