Patent · US Expired

Energy supply device having a shaft rotatably supported on a polytetrafluroethylene bearing surface

US6920826B2 · kind B2 · utility

0Cited by

22References

6Claims

0Family size

Assignee

Junghans Feinwerktechnik GmbH & Co., KG · DE

Inventors

Frank Kienzler · Villingen-Schwenningen, DE
Jurgen Voigt · Schramberg, DE
Wolfgang Schillinger · Schiltach, DE
Herbert Honi · Schenkenzell, DE

Key dates

Filing date	Nov 21, 2003
Grant date	Jul 26, 2005
Priority date	—
Expiry date	Jan 21, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH02K5/1672
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An energy supply device for a mortar fuse includes a housing, a driven rotary shaft including a cylindrical shaft surface rotatably disposed in a stationary cylindrical bearing surface in the housing, and a fan connected to the shaft for rotating the shaft in a single direction of rotation in a speed range of 30,000-50,000 rpm. Either of the cylindrical bearing surface or the cylindrical shaft surface has a destructible coating of polytetrafluoroethylene, the coating having a thickness in the range of 0.02-0.03 mm, and being destructible in response to rotation of the shaft in the speed range for a period of time no longer than 5 minutes.

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