Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly
AssigneeCenter Rock Inc.
InventorsLeland H. LYON, Warren Thomas LAY
Life of this patent
Estimating the term…
Abstract
A down-the-hole drill hammer is provided that includes a housing, a solid core piston mounted within the housing, a seal located between the solid core piston and the housing, and a backhead configured to exhaust working fluid volumes about a proximal end of the DHD hammer. The backhead includes a check valve assembly having a plug seal that can be moved to a closed seal position by gravity. A DHD hammer having a segmented chuck assembly is also provided. The segmented chuck assembly includes a plurality of chuck segments forming a cylindrical chuck assembly.
Claims26
A down-the-hole drill hammer comprising:
- a housing;
- a solid core piston within the housing;
- a seal located between the solid core piston and the housing;
- and
- a backhead configured within the housing and superior to the solid core piston, the backhead including:
- an exhaust port in communication with an opening in the housing,
- an exhaust valve stem in communication with the exhaust port, and
- a check valve assembly configured to seal the exhaust valve stem when in a closed configuration.
A down-the-hole drill hammer comprising:
- a housing;
- a piston mounted within the housing and configured to reciprocatively move within the housing along a longitudinal direction;
- a drill bit proximate a distal end of the housing, the drill bit including:
- a head, and
- a shank having a shoulder;
- and
- a segmented chuck assembly circumscribing the drill bit, the segmented chuck assembly including:
- a plurality of chuck segments, each of the chuck segments including:
- a proximal end connectable to the housing,
- a distal end configured to receive the shank of the drill bit, and
- a flange configured to operatively engage the shoulder of the shank.
A segmented chuck assembly for a down-the-hole drill hammer comprising:
- a plurality of chuck segments for circumscribing a drill bit, each of the plurality of chuck segments including:
- a proximal end connectable to a down-the-hole drill hammer housing,
- a distal end configured for receiving the drill bit, and
- a flange configured for operatively engaging the drill bit.
A down-the-hole hammer, comprising:
- a housing;
- a piston mounted within the housing and configured to reciprocatively move within the housing along a longitudinal direction;
- a drill bit proximate a distal end of the housing, the drill bit including:
- a head,
- a bit shoulder proximate a proximal end of the head, and
- a shank extending proximally from the head, the shank having:
- an impact surface about a proximal end of the shank,
- a shoulder proximate a proximal end of the shank,
- a plurality of shank splines about a distal end of the shank, and
- a thrust shoulder proximate a proximal end of the plurality of shank splines and distal to the impact surface;
- and
- a chuck assembly circumscribing the drill bit and connected to the housing, the chuck assembly including a flange in direct contact with the thrust shoulder of the drill bit.
Dependencies are inferred from the claim text.