Piston Assembly with Wrist Pin Cap
AssigneeDeltaHawk Engines, Inc.
InventorAaron Gamache Foege
Life of this patent
Estimating the term…
Abstract
A wrist pin cap for a piston. The wrist pin cap is configured to form an interference fit with the piston. In specific embodiments, the wrist pin cap is positioned within the piston adjacent to an end of a wrist pin. In certain specific embodiments, the wrist pin cap is configured to form an interference fit with a counterbore of the piston. Some specific embodiments include a method for shrink fitting a wrist pin cap within a piston. In more specific embodiments, the wrist pin cap is shrunk by an application of liquid nitrogen.
Claims22
A piston assembly for use within a two-stroke diesel engine cylinder, the piston assembly comprising:
- a piston configured to travel within the cylinder, the piston having a substantially cylindrical shape, and the piston defining a substantially cylindrical cavity;
- a wrist pin having a substantially cylindrical shape that includes a first longitudinal end and a second longitudinal end, the wrist pin positioned within the substantially cylindrical cavity of the piston;
- a first wrist pin cap secured within the substantially cylindrical cavity of the piston, the first wrist pin cap positioned adjacent to the first longitudinal end of the wrist pin;
- and
- wherein the first wrist pin cap is shrink fit within the substantially cylindrical cavity of the piston.
(canceled)
A piston assembly for use within a two-stroke diesel engine cylinder, the piston assembly comprising:
- a piston having a substantially cylindrical shape, the piston defining a substantially cylindrical cavity, and the piston comprising:
- a wrist pin bearing positioned within the substantially cylindrical cavity, and
- a counterbore formed within the substantially cylindrical cavity adjacent to the wrist pin bearing;
- a wrist pin positioned within the wrist pin bearing, the wrist pin having a first longitudinal end and a second longitudinal end;
- a wrist pin cap secured within the counterbore;
- and
- wherein the wrist pin cap forms an interference fit with the counterbore.
(canceled)
A method of securing a wrist pin cap for use within a two-stroke diesel engine cylinder, comprising:
- providing a wrist pin, a wrist pin cap having a substantially cylindrical shape, and a piston having a wrist pin bearing configured to receive and support the wrist pin, the piston defining a counterbore configured to receive and support the wrist pin cap adjacent to the wrist pin;
- positioning the wrist pin within the piston, such that the wrist pin is supported by the wrist pin bearing;
- and
- shrink fitting the wrist pin cap within the counterbore.
Dependencies are inferred from the claim text.