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:
Jul. 12, 1994
Filed:
Oct. 14, 1993
Michael Meyerle, D-7996 Meckenbeuren, DE;
Other;
Abstract
Stepless hydromechanical mechanism with multiple power-transmission paths, more particularly for motor vehicles, having at least two switching ranges in which the stepless control of the mechanism is effected by a hydrostatic transmission, in which the specific requirements on the hydrostatic unit are reduced to a minimum. The hydrostatic power content is reduced. The parameters determining noise, efficiency and service life, i.e., hydrostatic pressure, hydrostatic speed, as well as the values of these components and their arrangement are brought into acceptable and technically feasible bounds. To this end, two summation planetary gearing mechanisms are provided in which the input shaft of the transmission is drivingly connected to a first hydrostatic unit and to a first inlet shaft of the first summation planetary gearing mechanisms, and a second hydrostatic unit is connected to a second inlet shaft of the first summation planetary gearing mechanism and to a first inlet shaft of the second summation planetary gearing mechanism.