Patent · US Active

Drive shaft in a handheld work apparatus

US10670070B2 · kind B2 · utility

1Cited by

5References

14Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Wolfgang Weissert · Winnenden, DE
Jan Foehrenbach · Fellbach, DE
Andreas Wolf · Munich, DE
Christian Bareiss · Aachen, DE
Andreas Rieger · Welzheim, DE
Simone Pelludat · Schorndorf, DE

Key dates

Filing date	Oct 26, 2017
Grant date	Jun 2, 2020
Priority date	—
Expiry date	Aug 31, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T403/49
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A telescopic drive shaft in a protective tube of a handheld work apparatus has one end connected to a rotational drive and the other end thereof to a driven tool. The drive shaft includes a rigid shaft segment and a connecting section. The rigid shaft segment has a hollow shaft end portion and an engagement length (E) of the connecting section engages therein. The engagement length (E) and the length of the hollow shaft end portion mutually overlap to form a joining section. The hollow shaft end portion is deformed for connecting the connecting section to the rigid shaft segment. The material of the hollow shaft end portion is compressed over its entire periphery and deformed so that the material of the hollow shaft end portion is radially displaced and is pressed in a rotative manner onto the engagement length (E) to produce a balanced, loadable connection.

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