Slipper retainer for hydraulic unit

Patent metadata

Field	Value
Publication number	US-9863408-B2
Application number	US-201514598291-A
Country	US
Kind code	B2
Filing date	Jan 16, 2015
Priority date	Jan 16, 2015
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A slipper retainer of a hydraulic unit having a circular body having a back surface and an outer edge, the circular body defining a diameter of about 2.240 inches (5.629 cm), a central aperture through a center of the circular body, the circular body having a curved surface defining an edge of the central aperture, wherein the curved surface is defined by a sphere that is centered at a point located a distance of about 0.209 inches (0.531 cm) from the back surface of the body, and a plurality of slipper apertures located between the curved surface of the circular body and the outer edge of the circular body, wherein each slipper aperture of the plurality of slipper apertures has a diameter of about 0.464 inches (1.179 cm).

First claim

What is claimed is:

1. A slipper retainer of a hydraulic unit, comprising:
a circular body having a back surface and an outer edge, the circular body defining a diameter of about 2.240 inches;
a central aperture through a center of the circular body, the circular body having a curved surface defining an edge of the central aperture, wherein the curved surface is defined by a sphere that is centered at a point located a distance of about 0.209 inches from the back surface of the body; and
a plurality of slipper apertures located between the curved surface of the circular body and the outer edge of the circular body, wherein each slipper aperture of the plurality of slipper apertures has a diameter of about 0.464 inches,
wherein the circular body includes a first thickness proximal to the central aperture and a second thickness proximal to the outer edge, the first thickness being greater than the second thickness and extending a first radial extent from the central aperture, the second thickness having a second radial extent, and a tapering surface extending from the first thickness to the second thickness, and
wherein the first thickness is about 0.108 inches and the second thickness is about 0.054 inches.

2. The slipper retainer of claim 1 , wherein the diameter of the circular body has a variability of about +0.000 inches and about −0.005 inches.

3. The slipper retainer of claim 1 , wherein the distance of the point of the center of the sphere has a variability of about +0.000 inches and about −0.003 inches.

4. The slipper retainer of claim 1 , wherein the diameter of each of the plurality of slipper apertures has a variability of about +/−0.002 inches.

5. The slipper retainer of claim 1 , wherein the plurality of slipper apertures define nine slipper apertures.

6. The slipper retainer of claim 1 , wherein the first thickness has a variability of about +/−0.003 inches.

7. The slipper retainer of claim 1 , wherein the second thickness has a variability of about +/−0.001 inches.

8. The slipper retainer of claim 1 , wherein the sphere defining the curved surface has a diameter of about 1.1090 inches.

9. The slipper retainer of claim 8 , wherein the diameter of the sphere has a variability of about +0.0010 inches and about −0.0000 inches.

10. The slipper retainer of claim 1 , wherein each of the plurality of slipper apertures is radially located a distance of about 0.820 inches from a center of the circular body.

11. The slipper retainer of claim 1 , wherein the curved surface of body is configured to slidably engage with a retainer ball of a hydraulic unit.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Campbell Kris H
• Lemmers Jr Glenn C
• Smith Doren C

Classifications

• F03C1/0671

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• F04B1/2092

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• F03C1/0673

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• F04B1/2078

  Swash plates · CPC title

• F04B1/126 Primary

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