Patent · US Active

Continuously variable hydrostatic transmission having torque division

US8915813B2 · kind B2 · utility

0Cited by

5References

17Claims

0Family size

Assignee

MALI Holding AG · CH

Inventors

Markus Liebherr · Ennetbaden, CH
Peter Dziuba · Helmstedt, DE
Josef Häglsperger · Gangkofen, DE

Key dates

Filing date	Jan 25, 2010
Grant date	Dec 23, 2014
Priority date	—
Expiry date	Jun 21, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2200/2005
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A continuously variable hydrostatic transmission (10) having torque division for a vehicle comprises a first hydrostatic unit (H1) operating as a pump and a second hydrostatic unit (H2) operating as a motor, and further a planetary drive (12), a first shaft (W1) on the drive side and a summing means (W6). The power present at the first shaft (W1) is divided by way of the planetary drive (12) to a mechanical transmission branch (Z9, W2, Z1, Z2) and a hydraulic transmission branch (Z7, W3, Z4, Z5, Z6, H1, H2) formed by the two hydraulically coupled hydrostatic units (H1, H2) and is combined again at the summing means (W6). In such a transmission, a compact and simplified design and great flexibility in application are achieved in that the power transmission between the first shaft (W1) and summing means (W6) can be controlled exclusively by varying the displacements of the hydrostatic units (H1, H2).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.