Goods & Services

Machines and trimming machines; motors, other than for land vehicles; machine couplings and transmission components, other than for land vehicles; agricultural implements, other than hand-operated; incubators for eggs. Hand tools and implements [hand-operated]; cutlery; edge tools (hand tools); non electric razors. Construction; maintenance and repair; installation services.

Goods & Services

Drilling machines and parts therefor; rock drills; drilling machine supports being structural parts of drilling machines; ground drilling apparatus being machines; implements for drilling being machines; carriage plates for rock drills being structural parts of rock drills Hand-operated tools for cutting, drilling, grinding, and sharpening Installation, maintenance and repair of rock drills

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.

IPC Classes  ?

• F16K 21/04 - Self-closing valves, i.e. closing automatically after operation
• B25D 9/20 - Valve arrangements therefor involving a tubular-type slide valve
• E21B 4/14 - Fluid operated hammers
• B23P 15/00 - Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
• E21B 1/02 - Surface drives for drop hammers, e.g. with a cable
• E21B 7/02 - Drilling rigs characterised by means for land transport, e.g. skid mounting or wheel mounting

Abstract

A valve of a hydraulically striking device having a housing, the housing having 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 housing has at least a first abutment surface abutting the moving member, the first abutment surface of the housing has a first surface located in a radial inner portion of the first abutment surface, wherein the first surface is arranged in fluid communication with the inner space, and a second surface located in a radial outer portion of the first abutment surface, wherein the second surface is arranged to form a sealing surface.

IPC Classes  ?

• E21B 4/14 - Fluid operated hammers
• B25D 9/20 - Valve arrangements therefor involving a tubular-type slide valve
• F16K 27/04 - Construction of housingsUse of materials therefor of sliding valves
• E21B 1/00 - Percussion drilling
• F16K 3/02 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor
• F16K 31/12 - Operating meansReleasing devices actuated by fluid

Abstract

A rock drilling machine includes a frame, and arranged inside the frame is a drill rod. A hammer gear is arranged to hammer the drill rod rear end. There is arranged around the drill rod a position sleeve and an arrangement to move position sleeve in an axial direction against hammering piston so that a counter surface of the position sleeve meets the counter surface whereby, on continuing the positioning, the drill rod is movable to the point desired. The counter surface by use of a spring element is arranged to flex in regard to the other structure of the position sleeve so that in the drilling position the sleeve is arranged to be freely backing against the front side of the drilling machine, and when in the drilling operation the positioning impact on the position sleeve against the hammering piston is removed.

IPC Classes  ?

• E21B 10/36 - Percussion drill bits