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:
May. 31, 2011
Filed:
Mar. 06, 2008
Alexander Loeffler, Kaufering, DE;
Reinhard Schulz, Munich, DE;
Alexander Loeffler, Kaufering, DE;
Reinhard Schulz, Munich, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A hand-held power tool includes a percussion power tool includes a percussion piston () for applying blows to an anvil () axially displaceable in a guide tube () within limits defined by two, spaced from each other, stops () arranged in the guide tube (), a pneumatic percussion mechanism () for driving the percussion piston (), an air spring () for connecting the percussion piston () with the percussion mechanism (), and an impact ring () arranged coaxially with the anvil () outwardly thereof and having spaced from each other, inner radical flanks () located on opposite axial sides of the outer radial collar () provided on the anvil (), with the impact ring () freely axially displaceable, within limits, relative to the outer radial collar () and having an outer diameter smaller than a guiding inner diameter of the guide tuber (), and with a mass ratio of the impact ring () to the anvil () being equal at least 0.25.