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:
May. 09, 1995
Filed:
Apr. 17, 1992
Peter Michel, Kleinrinderfeld, DE;
Alfred Kummel, Kitzingen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
For a reliable moisture-tight seal at the separation point between a motor housing and a gear housing with a drive shaft of the motor projecting into the gear housing as a helical shaft and its mounting (cup bearing) in the region of the separation point, the cup bearing has a double-lip seal in the sense of a complete moisture seal of the motor housing relative to the gear housing assigned to it. An outside seal of the gear housing is thus eliminated. In order to be able to guarantee long maintenance-free operating lifetimes in spite of penetration of moisture into the gear housing part, the worm wheel which meshes with the helical shaft made of steel, which projects into the gear housing part, consists of POM plastic with lubrication-modified POM plastic added in a certain mixture ratio.