Patent · US Expired

Gear wheel mechanism

US4905535A · kind A · utility

13Cited by

13References

7Claims

0Family size

Assignee

Mannesmann Rexroth AG · DE

Inventors

Werner Ludwig · Darmstadt, DE
Rainer Nickel · Lohr am Main, DE

Key dates

Filing date	Oct 28, 1987
Grant date	Mar 6, 1990
Priority date	—
Expiry date	Oct 28, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19995
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A hydrostatic gear wheel mechanism has two intermeshing gear wheels in the work space of a housing. To continuously rinse the gear wheel and housing surfaces which slide on each other, grooves on the gear wheel convey lubricant from the work space to between the gear wheel front faces and the axial end walls of the work space.

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