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US 12,296,453 B2Granted
Hammer piston
AssigneeCaterpillar Inc.
InventorCody Moore
Life of this patent
Estimating the term…
Abstract
A piston for a hydraulic hammer of a work machine is disclosed. The piston comprises a first portion having a first diameter, a second portion having a second diameter larger than the first diameter, the second portion having a plurality of grooves, and a third portion having a third diameter less than the second diameter.
Claims12
A piston for a hydraulic hammer of a work machine, the piston comprising:
- a first portion having a first diameter;
- a second portion having a second diameter larger than the first diameter, the second portion having a plurality of grooves, each of the plurality of grooves has a depth of 3 mm to 10 mm;
- and
- a third portion having a third diameter less than the second diameter, and the third diameter of the piston is greater than the first diameter,
- wherein the third portion defines a striking end of the piston,
- wherein the second portion is between the first portion and the second portion,
- wherein the plurality of grooves consists of three timing grooves, and
- wherein an outer surface of the second portion is cylindrical and smooth and free of any surface features except for the three timing grooves.
5 more elements
A hammer assembly for use with a work machine comprising:
- a cylinder;
- a piston reciprocally mounted within the cylinder including:
- a first portion having a first diameter,
- a second portion having a second diameter larger than the first diameter, the second portion having a plurality of grooves, each of the plurality of grooves has a depth of 3 mm to 10 mm, and
- a third portion having a third diameter less than the second diameter, and the third diameter of the piston is greater than the first diameter;
- and
- a hammer tool coupled to the piston,
- wherein the third portion defines a striking end of the piston,
- wherein the second portion is between the first portion and the second portion,
- wherein an outer surface of the second portion is cylindrical and smooth and free of any surface features except for the plurality of grooves, and
- wherein all of the plurality of grooves are at a same height as each other in a longitudinal direction of the second portion and spaced from each other radially about an outer circumference of the second portion.
8 more elements
Dependencies are inferred from the claim text.