Patent · US Expired

Friction damper, in particular for washing machines with spin cycle

US4729458A · kind A · utility

22Cited by

10References

9Claims

0Family size

Assignee

Fritz Bauer + Sohne oHG · DE

Inventors

Hans-Peter Bauer · Altdorf, DE
Hans J. Bauer · Altdorf, DE
Ludwig Stadelmann · Altdorf, DE

Key dates

Filing date	Mar 19, 1986
Grant date	Mar 8, 1988
Priority date	—
Expiry date	Mar 19, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T403/535
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A friction damper, especially for washing machines with a spin cycle, consists of a housing (1) having a substantially circular cylindrical inner wall and a tappet (2) that can be pushed coaxially into the housing, extending at one end out of the housing and at the other end being provided with a friction piston. The friction piston is provided with friction elements pressed elastically against the inner wall of the housing (1), and securing elements (4, 8) are formed on the respective ends of the tappet (2) and housing (1). To attain a considerable reduction in the damping forces once there has been a passage through the critical rpm level, the housing (1) is made of plastic.

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