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:
Oct. 24, 2006
Filed:
Nov. 05, 2003
Applicant:
Roger Noel, Bron, FR;
Inventor:
Roger Noel, Bron, FR;
Assignee:
Sandvik Tamrock OY, Tampere, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for controlling at least two hydraulic actuators, to a monitoring valve and a rock drilling apparatus. The monitoring valve () is connected to the input channel of a first actuator through a sensing channel () and controls a load-sense circuit (') of a second actuator. The pressure of the load-sense circuit (′) is set by a force of a spring element () and biased by a control element () of the monitoring valve with differential pressure sensing.