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. 10, 2001
Filed:
May. 18, 1999
Applicant:
Inventor:
Tapani Huhdanmäki, Tampere, FI;
Assignee:
Sandvick Tamrock Oy, Tampere, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23Q 5/00 ;
U.S. Cl.
CPC ...
B23Q 5/00 ;
Abstract
An arrangement in a rock drilling apparatus comprising supports (,) directed toward the rear part of the feed, the supports being moveable by means of support cylinders (,) to support the feed during the drilling operation. The arrangement comprises a pressure detector (,), which is arranged to detect the pressure of the pressure fluid in the support cylinders (,) and to make the control unit supply more pressure fluid to the support cylinders (,) when the pressure drops below a pre-set threshold value.