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US 10,562,166 B2Granted
Hydraulic hammer having co-axial accumulator and piston
AssigneeCaterpillar Inc.
InventorCody Moore
Life of this patent
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Abstract
A hydraulic hammer is disclosed having a piston and an accumulator membrane disposed external and co-axial to the piston. Additionally, a sleeve is disposed between the piston and accumulator membrane, wherein the sleeve has a plurality of radial passages formed therein that fluidly connect the accumulator membrane with the piston.
Claims2
A method of operating a hydraulic hammer, comprising:
- receiving pressurized fluid at an inlet;
- directing the pressurized fluid axially into an accumulator membrane;
- redirecting the pressurized fluid radially inward from the accumulator membrane toward a piston;
- biasing the piston upward with the pressurized fluid;
- selectively blocking and passing the pressurized fluid to a valve with movement of the piston;
- directing the pressurized fluid axially away from a tip of the piston to the valve;
- biasing the valve upward with the pressurized fluid;
- selectively directing the pressurized fluid into a fluid chamber located axially adjacent to the valve;
- biasing the piston downward, away from the valve, with the pressurized fluid in the fluid chamber;
- wherein biasing the piston upward increases gas pressure within a gas chamber located axially adjacent to the fluid chamber;
- and
- biasing the piston downward and away from the valve with the pressurized gas in the gas chamber.
9 more elements
Dependencies are inferred from the claim text.