Patent · US Active

Electropneumatic impact mechanism

US12350802B2 · kind B2 · utility

0Cited by

9References

15Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Ernst-Rudolf Lübkert · Landsberg, DE
Uto Plank · Freising, DE
Jochen Erhardt · Klosterlechfeld, DE

Key dates

Filing date	Apr 7, 2021
Grant date	Jul 8, 2025
Priority date	—
Expiry date	Dec 30, 2041

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25D2250/365
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is designed as an externally toothed gearwheel and is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing about an axis of rotation on the other side, an axial gap, preferably for optionally receiving at least part of a lubrication space separating element, is provided between an eccentric wheel surface facing the connecting rod and a connecting rod surface facing the eccentric wheel.

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