Piston for an engine
AssigneeBriggs & Stratton Corporation
InventorsJerry L. Schenkel, Jeffrey H. Whitmore
Life of this patent
Estimating the term…
Abstract
A piston for use in an engine. The piston includes a piston head having at least one ring groove. The piston also includes a piston skirt coated with a first thickness of a bronze coating material, and a side panel adjacent the piston skirt that is coated with a second thickness of the bronze coating material. The first and second thicknesses of the bronze coating material are different. In some embodiments, the bronze coating material also includes aluminum.
Claims61
A piston for use in an engine, the piston comprising:
- a piston head, the piston head including at least one ring groove;
- a piston skirt coated with a first thickness of a bronze coating material;
- a side panel adjacent the piston skirt, the side panel coated with a second thickness of the bronze coating material;
- and
- a land adjacent to the side panel;
- wherein the first and second thicknesses of bronze coating material are different.
A method of making a piston comprising:
- forming a piston blank having a piston head, a piston skirt, and a side panel, the piston skirt having a smaller diameter than the piston head;
- applying a coating material to the piston skirt;
- machining the piston blank only after the coating is applied such that the diameter of the piston skirt after machining is greater than or equal to the diameter of the piston head after machining;
- and
- wherein the piston machining step includes creating ring grooves in the piston head, and includes removing any coating material from the piston head.
A piston comprising:
- a piston head, the piston head including at least one ring groove;
- a piston skirt having a bronze coating material thereon;
- a side panel adjacent the piston skirt, the side panel having the bronze coating material thereon;
- and
- a land adjacent to the side panel having no bronze coating material thereon.
A piston comprising:
- a piston head, the piston head including at least one ring groove;
- a piston skirt coated with a first thickness of a bronze coating material;
- a side panel adjacent the piston skirt, the side panel coated with a second thickness of the coating material, the side panel having an aperture therein to receive a connecting pin;
- a land adjacent to the side panel;
- and
- at least one pin boss disposed radially inwardly of the side panel;
- wherein the first and second thicknesses of bronze coating material are different.
A piston for use in an engine, the piston comprising:
- a piston skirt coated with a bronze coating material;
- a side panel adjacent the piston skirt, the side panel coated with the bronze coating material;
- a land adjacent to the side panel;
- and
- a piston head including at least one ring groove, the piston head including no bronze coating material.
Dependencies are inferred from the claim text.