Compression piston ring for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10113643-B2
Application number	US-201414217984-A
Country	US
Kind code	B2
Filing date	Mar 18, 2014
Priority date	Mar 18, 2014
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A compression ring for an engine piston includes an upper and lower face, and an inner face positioned between the upper and lower faces along an inner diameter of the ring. An outer face is positioned between the upper and lower faces along an outer diameter of the ring and is formed by a continuous curve along the axial direction of the ring. The continuous curve has first and second convex surfaces connected by a concave surface with each convex surface defined by first and second radii, respectively. A method of forming a piston compression ring includes machining an outer face of the ring to form a continuous curve along an axial direction of the ring, where the continuous curve has a first convex section and a second convex section connected by an intermediate section.

First claim

What is claimed is:

1. A compression ring for an engine piston comprising:
an upper face and a lower face;
an inner face positioned between the upper and lower faces along an inner diameter of the ring, wherein the upper face, the lower face, and the inner face cooperate with an annular groove in the piston; and
an outer face positioned between the upper and lower faces along an outer diameter of the ring for cooperation with a bore in a cylinder, the outer face formed by a sm…

Assignees

• Ford Global Tech Llc

Inventors

• Williams Rickey L

Classifications

• Y10T29/49274

  Cross-Sectional Technologies · mapped topic

• F16J9/20 Primary

  Mechanical Engineering · mapped topic

• F02F3/00

  Mechanical Engineering · mapped topic

• B23P15/08

  Operations & Transport · mapped topic

• F16J9/12

  Mechanical Engineering · mapped topic