Patent · US Expired

Portable, combustion-engined tool and a method of controlling the tool operation

US6425354B1 · kind B1 · utility

20Cited by

1References

7Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Franz Buchel · Ruggell, LI
Stefan Bonig · Lindau (Bodensee), DE
Joachim Thieleke · Günzburg, DE
Iwan Wolf · Chur, CH

Key dates

Filing date	Dec 19, 2000
Grant date	Jul 30, 2002
Priority date	—
Expiry date	Dec 19, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB25C1/08
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method of controlling operation of a portable, combustion-engined tool including a combustion chamber (1) an inlet/outlet valve (26) of which is closed or is opened dependent on an operational phase of the tool, with the method including igniting a fuel gas mixture filling the combustion chamber (1) for build-up of gas pressure therein and closing or opening the inlet/outlet valves (26) dependent on the gas pressure developed in the combustion chamber (1), and a tool in which the method is implemented.

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