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:
Dec. 17, 2019
Filed:
Aug. 19, 2015
Applicant:
Doofor Oy, Nokia, FI;
Inventor:
Jaakko Hämäläinen, Tampere, FI;
Assignee:
Doofor Oy, Nokia, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 21/04 (2006.01); B25D 9/20 (2006.01); E21B 4/14 (2006.01); B23P 15/00 (2006.01); E21B 1/02 (2006.01); E21B 7/02 (2006.01);
U.S. Cl.
CPC ...
F16K 21/04 (2013.01); B23P 15/001 (2013.01); B25D 9/20 (2013.01); E21B 1/02 (2013.01); E21B 4/14 (2013.01); E21B 7/025 (2013.01);
Abstract
A valve of a hydraulically striking device having a housing, the housing comprising a moving member being seated inside the housing to move in a reciprocating manner by means of a hydraulic fluid. The moving member has an inner space, the valve has a return space and a pressure space provided, in the axial direction, at a distance from one another on the inner surface of the housing facing the moving member, wherein the rest of the inner surface of the housing in the same axial positions of the return space and the pressure space forms guide surfaces that are concentric with the moving member and against the moving member for centering the moving member.