Patent · US Expired

Disconnectable transmission assemblies

US4885957A · kind A · utility

13Cited by

10References

15Claims

0Family size

Assignee

Viscodrive GmbH · DE

Inventors

Herbert Taureg · Hennef (Sieg), DE
Helmut Wiese · Neunkirchen, DE
Paul-Erich Schonenbrucher · Much, DE

Key dates

Filing date	Dec 22, 1988
Grant date	Dec 12, 1989
Priority date	—
Expiry date	Dec 22, 2008

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H63/3026
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A disconnectable transmission assembly comprising a coupling member within which is rotatably mounted in bearings a viscous coupling having a housing member and a hub which respectively carry interleaved plates. The coupling member and the housing member are connectable and disconnectable by means of a deformable sleeve which closes a chamber formed in the housing member and which can be supplied by fluid under pressure from a cylinder by movement of a piston. Deformation of the sleeve, which is connected to the housing member, engages the bore of the coupling member thus connecting the housing member and the coupling member for rotation. When the chamber is de-pressurized there is a running clearance between the sleeve and the coupling member.

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