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US 10,745,972 B2Granted
Shank adaptor with reinforced flushing slot
AssigneeSandvik Intellectual Property AB
InventorsSusanne Lejon, Magnus Persson, Tomas Sh Jansson
Life of this patent
Estimating the term…
Abstract
A rock drilling shank adaptor includes an elongate body having an internal flushing bore and an entry hole through the sidewall of the adaptor in fluid communication with the internal bore. The adaptor wall at the region of the entry hole is reinforced such that an internal diameter of the flushing bore at the reinforced region is less than an internal diameter of the bore at a position axially beyond the reinforced region.
Claims12
A rock drilling shank adaptor comprising:
- an elongate body having a first end and a second end relative to a longitudinal axis, the first end being arranged to be positioned towards a piston and the second end being arranged to be positioned towards a drill string, the body having an axially extending internal bore arranged to allow passage of a flushing fluid to the drill string via the second end;
- not more than two flush holes extending radially through the body to the internal bore;
- and
- an axially reinforced region of the body including the flush holes, wherein a wall thickness of the body at the axially reinforced region is in a range of 35-50% greater than a wall thickness of the body at the axial position located beyond the axially reinforced region.
1 more element
A rock drilling apparatus comprising:
- an elongate piston;
- a drill string;
- and
- a shank adaptor including an elongate body having a first end and a second end relative to a longitudinal axis, the first end being arranged to be positioned towards the piston and the second end being arranged to be positioned towards the drill string, the body having an axially extending internal bore to allow passage of a flushing fluid to the drill string via the second end, not more than two flush holes extending radially through the body to the internal bore, an axially reinforced region including the flush holes, and a wall thickness of the body at the axially reinforced region is in a range of 35-50% greater than a wall thickness of the body at the axial position located beyond the reinforced region.
1 more element
Dependencies are inferred from the claim text.