Back to results
US 12,523,102 B2Granted
Down-the-hole hammer having an inverted casing
AssigneeCenter Rock Inc.
InventorsWarren Thomas Lay, Austin C. Hine
Life of this patent
Estimating the term…
Abstract
A down-the-hole drill hammer comprising a casing having externally threaded distal end, and a chuck having internal threads threadedly connectable to the distal end of the casing. The down-the-hole drill hammer further comprising a drill bit having a head and a shank extending proximally from the head, and a bit retaining ring between the casing and the chuck for releasably retaining the drill bit.
Claims20
A down-the-hole drill hammer comprising:
- a casing having an externally threaded distal end;
- a chuck having internal threads threadedly connectable to the distal end of the casing;
- a drill bit having a head and a shank extending proximally from the head, wherein a length of the drill bit shank is about 0.6 to about 0.85 of an overall diameter of the drill bit head;
- and
- a bit retaining ring between the casing and the chuck for releasably retaining the drill bit.
2 more elements
A down-the-hole drill hammer comprising:
- a casing having an externally threaded distal end;
- a chuck having internal threads threadedly connectable to the distal end of the casing and a plurality of splines each having a radially inwardly extending step;
- a drill bit having a head and a shank extending proximally from the head;
- and
- a bit retaining ring between the casing and the chuck for releasably retaining the drill bit.
2 more elements
Dependencies are inferred from the claim text.