Fluid pressure striking device
AssigneeTeisaku Corporation
InventorsMasanori Ito, Hiroshi Fujimoto
Life of this patent
Estimating the term…
Abstract
A fluid pressure hitting device comprises a piston inserted in a cylinder, a chisel, and a first, second, and third chambers. The chisel is fitted in the cylinder such that a part of the chisel projects from one axial end of the cylinder and is configured to further project from that axial end due to being hit by the piston as the piston slides toward the one axial end. The first through third chambers are partitioned by an inner peripheral surface of the cylinder and an outer peripheral surface of the piston. The first through third chambers are arranged in the axial direction in order fluid the one axial end to another axial end of the cylinder. A flow path is configured to supply fluid from a fluid supply portion when the piston hits the chisel, to the first chamber.
Claims17
A fluid pressure hitting device, comprising:
- a cylinder having a cylindrical shape;
- a piston inserted in the cylinder and configured to slide in an axial direction of the cylinder;
- a chisel having a bar shape and fitted in the cylinder such that a part of the chisel projects from one axial end of the cylinder, the chisel being configured to further project from the one axial end due to being hit by the piston as the piston slides toward the one axial end;
- and
- a first chamber, a second chamber, and a third chamber partitioned by an inner peripheral surface of the cylinder and an outer peripheral surface of the piston, the first, second, and third chambers being arranged in the axial direction in order from the one axial end of the cylinder to another axial end of the cylinder, wherein:
- the piston is configured to slide between the one axial end and the other axial end of the cylinder when a fluid pressure in the first chamber is shifted between a high fluid pressure and a low fluid pressure,
- a flow path is configured to supply fluid from a fluid supply portion to the first chamber,
- the fluid supply portion has a fluid pressure higher than a fluid pressure of the first chamber when the piston hits the chisel;
- and
- the fluid supply portion includes the second chamber.
A fluid pressure hitting device, comprising:
- a cylinder;
- a piston inserted in the cylinder, the piston being configured to slide in an axial direction of the cylinder;
- a chisel fitted in the cylinder such that a part of the chisel projects from a first axial end of the cylinder, the chisel being configured to further project from the first axial end due to being hit by the piston as the piston slides toward the first axial end;
- a first chamber, a second chamber, and a third chamber partitioned by an inner peripheral surface of the cylinder and an outer peripheral surface of the piston, the first, second, and third chambers being arranged in the axial direction in order from the first axial end of the cylinder to a second axial end of the cylinder;
- and
- a flow path configured to supply fluid to the first chamber, wherein:
- the piston is configured to slide between the first axial end and the second axial end of the cylinder when the first chamber is shifted between a high fluid pressure state and a low fluid pressure state,
- the flow path is configured to supply the fluid to the first chamber when the first chamber is in the low fluid pressure state,
- the piston is configured to hit the chisel while the first chamber is in the low fluid pressure state , and
- the fluid in the flow path flows into the first chamber as the piston slides toward the first axial end while the first chamber is in the low fluid pressure state.
Dependencies are inferred from the claim text.