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. 27, 2026
Filed:
Apr. 06, 2023
Sandvik Mining and Construction Oy, Tampere, FI;
Antti Koskimaki, Tampere, FI;
Timo Kela, Tampere, FI;
Mikko Hamalainen, Tampere, FI;
Lars Kandelin, Tampere, FI;
Sandvik Mining and Construction Oy, Tampere, FI;
Abstract
A control valve, an impact device for a rock breaking apparatus, and a method are provided. The control valve is an elongated piece with a central axis and radial outer and inner surfaces (Ros, Ris). The control valve includes several control surfaces disposed at axial distances from each other for controlling hydraulic fluid flows (Hff) in response to axial control movement (M). One or more radial surfaces of the control valve include one or more slanted surface (SS) a longitudinal direction of which have oblique orientation in relation to the central axis (Ca) of the control valve. The control valve rotates or turns during a working cycle due to hydraulic flow effecting on the slanted surfaces.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile