Patent · US Active

Fuel-operated firing device and method for operating a firing device of this type

US11204046B2 · kind B2 · utility

0Cited by

8References

20Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Tilo Dittrich · Feldkirch, AT
Daniel Yonil Jung · West Jordan, US
Dominik Schmidt · Palo Alto, US
Peter Bruggmueller · Bludesch, AT
Philipp Heinze · Munich, DE
Norbert Heeb · Buchs, CH
Edwin Staudacker · Munich, DE

Key dates

Filing date	Dec 20, 2016
Grant date	Dec 21, 2021
Priority date	—
Expiry date	Jul 14, 2038

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B2215/30
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a fuel-operated firing device for driving securing elements into a substrate, comprising at least one main combustion chamber for a fuel, a driving piston that can be driven out of the main combustion chamber in a firing direction by expandable gases, and a pre-chamber with which an ignition device is associated and in which a pressure acting on the main combustion chamber can build up prior to a fuel-air mixture being ignited in said main combustion chamber. In order to improve the efficacy and/or functionality during the driving in of securing elements using the fuel-operated firing device, the pre-chamber has at least two venting connections which are mutually spaced in an axial direction and which have passages that can be exposed conjointly in order to facilitate rapid venting of the pre-chamber.

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