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:
Jun. 13, 2000
Filed:
Mar. 18, 1998
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A combination drilling member includes an axially elongated drill, such as used for drilling rock, having an axially extending shaft (2) with a first end leading in the drilling direction containing a cutting bit (3). The shaft (2) has at least one helical drilled material removal groove (4) and an auxiliary element encircling and detachably connected to the shaft (2) intermediate the ends thereof. The auxiliary element (6) has at least one elastic plastic part (9) extending around the shaft and containing a through hole (10) for the shaft where the plastic part is secured to the shaft by at least one of frictional and positive locking engagement against inadvertent axial displacement and held against relative rotation to torques of up to 40 Nm.