Patent · US Expired

Procedure for shifting a transmission composed of several gear units

US4802384A · kind A · utility

17Cited by

9References

3Claims

0Family size

Assignee

Deere & Company · US

Inventors

Reinhard Schwarz · Garching bei München, DE
Heinz Stuhrmann · Schwetzingen, DE
Dieter Nobis · Neuss, DE

Key dates

Filing date	Sep 30, 1987
Grant date	Feb 7, 1989
Priority date	—
Expiry date	Sep 30, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19251
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A procedure for shifting a transmission composed of several gear units in which a number of synchronizer linkages are provided, is so designated that during a gear ratio change in the last gear unit, that is in that unit to which the speed of all preceding gear units must be brought, all shift linkages are initially released. Following this, the shift linkages are re-established beginning with the last gear unit. By this means unnecessary rotating inertias are decoupled, and the shift linkages, and particularly any synchronizing devices, can be reduced in size.

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