Piston ring installation tool

Patent metadata

Field	Value
Publication number	US-12269148-B2
Application number	US-202016995274-A
Country	US
Kind code	B2
Filing date	Aug 17, 2020
Priority date	Aug 16, 2019
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

Piston assembly installation tools are disclosed, each installation tool configured for installation of the piston assembly into an opposed-piston engine from a crankcase area of the engine. The installation tools comprise cutouts to account for cylinder block main journal saddles located on either side of a cylinder bore where the piston assembly may be installed.

First claim

What is claimed is:

1. An apparatus for installing piston rings, the apparatus comprising:
a self-supporting unitary body consisting of a single-piece of material;
the body comprising:
a sidewall with an inner surface having a continuous cylindrical portion and an outer surface, the sidewall defining an opening through the body;
at least one channel defined by the inner surface of the sidewall, the at least one channel extending longitudinally through the inner surface of the sidewall from a first end of the body to a second end of the body; and
a top portion surrounding the opening and extending outwardly beyond the sidewall, the top portion defining an indention configured to selectively receive a bumper.

2. The apparatus of claim 1 , further comprising a pin disposed on an upper surface of the indention, the pin configured to mate with an aperture defined by the bumper.

3. The apparatus of claim 1 , wherein the bumper is at least partially comprised of rubber.

4. The apparatus of claim 1 , wherein the bumper at least partially covers the channel when the bumper is received by the indention.

5. The apparatus of claim 1 , wherein the channel is aligned with the indentation.

6. The apparatus of claim 1 , wherein the channel is configured to receive a portion of a connecting rod.

7. The apparatus of claim 1 , the sidewall including a first cutout portion defining a first window and a second cutout portion defining a second window, the first cutout portion and the second cutout portion each defined in a single, parallel plane and the sidewall forming an arcuate shape between the first cutout portion and the second cutout portion.

8. The apparatus of claim 7 , wherein the channel is positioned between the first window and the second window.

9. The apparatus of claim 1 , further comprising a second channel positioned opposite the first channel.

10. An apparatus for installing piston rings, the apparatus comprising:
a cylindrical body defining a longitudinal axis and comprising a sidewall, the sidewall having a thickness and defining an opening through the cylindrical body, the cylindrical body including:
a first planar cutout portion parallel to the longitudinal axis and defining a first window so that the thickness of the sidewall tapers along the first planar cutout portion to the first window; and
a second planar cutout portion opposite of the first planar cutout portion, the second planar cutout portion parallel to the longitudinal axis and defining a second window so that the thickness of the sidewall tapers along the first planar cutout portion to the second window.

11. The apparatus of claim 10 , further comprising a top portion surrounding the opening and extending outwardly beyond the sidewall, the top portion defining an indention configured to selectively receive a bumper.

12. The apparatus of claim 11 , further comprising a pin disposed on an upper surface of the indention, the pin configured to mate with an aperture defined by the bumper.

13. The apparatus of claim 11 , wherein the bumper is at least partially comprised of rubber.

14. The apparatus of claim 11 , wherein the indention is positioned between the first cutout portion and the second cutout portion.

15. The apparatus of claim 11 , wherein the indention is a first indention and the apparatus further comprises a second indention positioned opposite of the first indention.

16. The apparatus of claim 10 , wherein the apparatus is positioned within a cylinder bore of a cylinder of an engine so that the first planar cutout portion is in contact with a first main journal and the second planar cutout portion is in contact with a second main journal.

Assignees

• Cummins Inc

Inventors

• Oswalt Bradley T

Classifications

• F02B75/28

  Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (arranged oppositely relative to main shaft F02B75/24) · CPC title

• F01B7/02

  with oppositely reciprocating pistons · CPC title

• B25B27/12 Primary

  mounting or demounting piston rings · CPC title