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:
Apr. 03, 2001
Filed:
May. 18, 1999
Jouko Muona, Siuro, FI;
Sandvik Tamrock Oy, Tampere, FI;
Abstract
A method and an arrangement for controlling the feed of a rock drill. In the method, the pressure in a pressure conduit (,) of a pressure-fluid-operated feed motor (,) is measured, and when the pressure value measured is below the pre-set threshold value, the volume flow of the pressure fluid delivered to the feed motor and thereby the feed rate of the feed motor (,) are adjusted, and when the pressure value measured is above the pre-set threshold value, the feed is adjusted by adjusting the pressure of the pressure fluid delivered to the feed motor (,). In the arrangement, a pressure detector (,) is arranged in the pressure conduit (,) of the feed motor (,). The detector is arranged to control the feed of the pressure fluid delivered to the feed motor (,) in such a way that when the pressure is below the pre-set threshold value, the feed is controlled by adjusting the volume flow of the pressure fluid and, correspondingly, when the pressure value is above the pre-set threshold value, the pressure detector adjusts the feed of the pressure fluid according to the pressure of the pressure fluid.