Variable wobbler for hydraulic unit

Patent metadata

Field	Value
Publication number	US-2016201697-A1
Application number	US-201514596423-A
Country	US
Kind code	A1
Filing date	Jan 14, 2015
Priority date	Jan 14, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A variable wobbler of a hydraulic unit includes a body having a first end and an opposite second end, the first end including an annular wall and an inner surface configured to contact a piston of the hydraulic unit. The body further includes an outer wall, an inner wall defining an inner diameter, and a conical inner wall extending from the inner wall. The variable wobbler further includes a first trunnion extending outwardly from the body and a second trunnion extending outwardly from the body.

First claim

What is claimed is:

1 . A variable wobbler of a hydraulic unit, the variable wobbler comprising:
a body having a first end and an opposite second end, the first end including an annular wall and an inner surface configured to contact a piston of the hydraulic unit, the body further having an outer wall, an inner wall defining an inner diameter, and a conical inner wall extending from the inner wall; a first trunnion extending outwardly from the body; and a second trunnion extending outwardly from the body.

2 . The variable wobbler of claim 1 , wherein a distance between opposed portions of the outer wall is between approximately 2.64±0.010 inches (6.7056±0.0254 cm) and approximately 2.701±0.002 inches (6.8605±0.0051 cm).

3 . The variable wobbler of claim 1 , wherein the inner diameter is approximately 1.053±0.002 inches (2.6746±0.0051 cm).

4 . The variable wobbler of claim 1 , wherein the conical inner wall is oriented at an angle relative to an axis extending through a center of the inner diameter, wherein the angle is between approximately 15° and approximately 19°.

5 . The variable wobbler of claim 1 , wherein the conical inner wall includes a first end adjacent the inner wall, an opposite second end, and a midpoint disposed between the first end and the second end, wherein the conical inner wall first end defines a first diameter, the midpoint defines a second diameter, and the conical inner wall second end defines a third diameter.

6 . The variable wobbler of claim 5 , wherein the first diameter is approximately 1.053±0.002 inches (2.6746±0.0051 cm).

7 . The variable wobbler of claim 5 , wherein the second diameter is approximately 1.188 inches (3.0175 cm).

8 . The variable wobbler of claim 5 , wherein a distance between the conical inner wall midpoint and the inner surface is approximately 0.282±0.015 inches (0.7163±0.0381 cm).

9 . The variable wobbler of claim 1 , wherein the inner surface comprises a friction-reducing coating.

10 . The variable wobbler of claim 9 , wherein the friction-reducing coating is between approximately 3 microns and approximately 5 microns.

11 . The variable wobbler of claim 10 , wherein the friction-reducing coating is an Amorphous Diamond-like Carbon Coating.

12 . The variable wobbler of claim 1 , wherein the first trunnion and the second trunnion are diametrically opposed.

13 . The variable wobbler of claim 1 , wherein a distance between the first and second trunnions is approximately 2.701±0.002 inches (6.8605±0.0051 cm).

14 . The variable wobbler of claim 1 , wherein the first trunnion has a length of approximately 0.375±0.010 inches (0.9525±0.0254 cm), and the second trunnion has a length of approximately 0.892±0.010 inches (2.2657±0.0254 cm).

Assignees

• Hamilton Sundstrand Corp

Inventors

• Campbell Kris H
• Lemmers Jr Glenn C
• Smith Doren C
• Martin Ted A
• Dell Jonathan C
• Yung Jong-Yeong

Classifications

• F15B15/1447

  Pistons; Piston to piston rod assemblies · CPC title

• F15B15/1428

  Cylinders (F15B15/1438 takes precedence) · CPC title

• F15B15/1404 Primary

  in clusters, e.g. multiple cylinders in one block · CPC title

• F03C1/0668

  Swash or actuated plate · CPC title

• F05D2220/76

  an electrical generator · CPC title