Patent · US Active

Percussive power tool

US10821589B2 · kind B2 · utility

0Cited by

17References

9Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Stefan Schmid · Neuendettelsau, DE
Markus HOLUBARSCH · Landsberg am Lech, DE
Markus Hartmann · Mauerstetten, DE
Eduard Pfeiffer · Halblech, DE

Key dates

Filing date	Dec 6, 2016
Grant date	Nov 3, 2020
Priority date	—
Expiry date	Jul 1, 2037

Classification

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

Abstract

A percussion mechanism contains a guide tube, an exciter piston, a hammer, a pneumatic chamber for coupling the hammer to the motion of the exciter piston, a striker, and a seat for the striker. The hammer has a striking point, defined by a striking surface of the striker when the striker lies against the seat. A check valve has an outlet opening and a closing mechanism for closing the check valve against an air flow from the interior of the guide tube. The outlet opening is arranged in such a way that the outlet opening is closed by the hammer during striking operation and otherwise is open.

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