Patent · US Expired

Combustion-engined tool having a braking device for its piston

US6505767B2 · kind B2 · utility

12Cited by

6References

9Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Joachim Thieleke · Günzburg, DE
Kaveh Towfighi · Sigmarszell, DE
Iwan Wolf · Chur, CH

Key dates

Filing date	Dec 19, 2000
Grant date	Jan 14, 2003
Priority date	—
Expiry date	Jan 15, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A portable, internal combustion-engined tool includes a combustion chamber (1), a piston (8) adjoining the combustion chamber (1), with a pressure build-up in the combustion chamber (1) providing for movement of the piston (8) from its initial position, in which the piston adjoins the combustion chamber (1), away from the combustion chamber (1). A brake device (43) retains the piston (8) substantially in its initial position during build-up of pressure in the combustion chamber (1), with a braking force applied to piston (8) being changeable for adjusting the amount of energy generated in the combustion chamber and transmittable to the piston (8).

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