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:
Aug. 25, 1987
Filed:
May. 28, 1986
Applicant:
Inventors:
Ismo Kuivamaki, Hyvinkaa, FI;
Klaus Uuskoski, Hyvinkaa, FI;
Assignee:
Elevator GmbH, Baar, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ; F01D / ; F04F / ;
U.S. Cl.
CPC ...
310 74 ; 310 87 ; 417 90 ;
Abstract
An electric motor, for instance for a hydraulic elevator, is entirely immersed within a liquid such as oil, and is provided with a flywheel. A drawback of this kind of electric motor is that the flywheel, rotating in oil, brakes the rotation of the motor. In the present electric motor the flywheel is enclosed in a housing and an air pipe extends to the housing so that by action of centrifugal force air is drawn into the housing, and liquid in the housing escapes from the housing through a discharge aperture when the motor starts.