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:
Apr. 24, 2001
Filed:
Sep. 27, 1999
Horst Schulz, Friedrichshafen, DE;
Jürgen Pescheck, Immenstaad, DE;
2F Friedrichshafen AG, Friedrichshafen, DE;
Abstract
The planetary gear according to the invention comprises a sun gear (,) connected to a driven central shaft (,), a ring gear (,), a group of first stepped planetary gears (,) and a group of second stepped planetary gears (,). The large step wheels (,) of the second stepped planetary gears engage the sun gear (,), the small step wheels (,) of the second stepped planetary gears simultaneously engage a pair of adjoining large step wheels (,) of the first stepped planetary gears and all small step wheels (,) of the first stepped planetary gears engage the ring gear (,). The gear allows for high transmission ratios having a small size and low inertia moment and offers excellent properties in relation to efficiency and transmission reliability.