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:
Mar. 13, 2001
Filed:
Mar. 17, 1999
Applicant:
Inventors:
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 2/100 ;
U.S. Cl.
CPC ...
E21B 2/100 ;
Abstract
A drilling tool, including a housing (,), a suction device (,), and at least one gas spring (,) cooperating with both the housing (,) and the suction device (,) and an operational direction of which is parallel to a drilling direction, with the housing (,) having bore (,) for receiving a piston rod (,) and at least a section of cylinder (,) of the at least one gas spring (,).