Hydraulic hammer having delayed automatic shutoff
AssigneeCaterpillar Inc.
InventorCody Moore
Life of this patent
Estimating the term…
Abstract
An automatic shutoff system for a hydraulic hammer is disclosed. The automatic shutoff system may include an inlet groove formed around a piston associated with the hydraulic hammer and configured to receive pressurized fluid, and an outlet groove formed around a piston associated with the hydraulic hammer and configured to discharge the pressurized fluid. The automatic shutoff system may also include an annular passage configured to allow the pressurized fluid to flow between the inlet and outlet grooves. The automatic shutoff system may further include a valve disposed upstream of the inlet groove and configured to selectively block the pressurized fluid from flowing into the inlet groove based on an operational state of the hydraulic hammer.
Claims20
An automatic shutoff system for a hydraulic hammer, comprising:
- an inlet groove formed annularly around a piston associated with the hydraulic hammer and configured to receive pressurized fluid;
- an outlet groove formed annularly around the piston associated with the hydraulic hammer and configured to discharge the pressurized fluid;
- an annular passage configured to allow the pressurized fluid to flow between the inlet and outlet grooves;
- and
- a valve disposed upstream of the inlet groove and configured to selectively block the pressurized fluid from flowing into the inlet groove based on an operational state of the hydraulic hammer.
A method of operating a hydraulic hammer, comprising:
- receiving pressurized fluid at an inlet groove;
- providing fluid communication between the inlet groove and an outlet groove via an annular passage connecting the inlet groove to the outlet groove;
- discharging the pressurized fluid from the outlet groove;
- and
- selectively blocking a flow of the pressurized fluid between the inlet and outlet grooves based on an operational state of the hydraulic hammer.
A hydraulic hammer system, comprising:
- a piston;
- a sleeve disposed external and co-axial to the piston;
- a plurality of inlet passages formed within the sleeve and configured to receive pressurized fluid;
- an inlet groove formed annularly at an internal surface of the sleeve and fluidly connected to the plurality of inlet passages;
- an outlet groove formed annularly at an internal surface of the sleeve and fluidly connected to the inlet groove;
- an annular passage configured to allow the pressurized fluid to flow between the inlet and outlet grooves;
- and
- an automatic shutoff system including a valve configured to delay an automatic shutoff operation based on an operational state of the hydraulic hammer.
Dependencies are inferred from the claim text.