The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2002
Filed:
Dec. 19, 2000
Applicant:
Inventors:
Franz Büchel, Ruggell, LI;
Stefan Bönig, Wasserburg, DE;
Joachim Thieleke, Wasserburg, DE;
Iwan Wolf, Chur, CH;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B25C 1/08 ;
U.S. Cl.
CPC ...
B25C 1/08 ;
Abstract
A method of controlling operation of a portable, combustion-engined tool including a combustion chamber ( ) an inlet/outlet valve ( ) 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 ( ) for build-up of gas pressure therein and closing or opening the inlet/outlet valves ( ) dependent on the gas pressure developed in the combustion chamber ( ), and a tool in which the method is implemented.