04856374 is referenced by 244 patents and cites 11 patents.

In known combinations of a planetary gear transmission with a continuously variable friction drive transmission, unsatisfactory accuracy in operation and excessive overall dimensions are found to be disadvantageous.

The transmission according to the invention comprises a planetary gear transmission (11) operatively connected to a continuously variable friction drive transmission (12) with spherical rolling members (19).

The transmission according to the invention is finely or infinitesimally adjustable over a wide range of positive or negative transmission ratios and particularly suitable for employ in a closed control system.

Title
Adjustable transmission
Application Number
7/160763
Publication Number
4856374
Application Date
February 26, 1988
Publication Date
August 15, 1989
Inventor
Hubert Kreuzer
Munderkingen
DE
Agent
Finnegan Henderson Farabow Garrett & Dunner
Assignee
planetroll Antriebe
DE
IPC
F16H 37/02
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