Facetted jewel bearings

Patent metadata

Field	Value
Publication number	US-9678478-B2
Application number	US-201414909804-A
Country	US
Kind code	B2
Filing date	Aug 12, 2014
Priority date	Aug 16, 2013
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

The invention provides bearing systems characterized by single point contact with each jewel segment and a spring-loaded assembly with protection from radial and thrust forces. An important feature of jewel bearings of the invention is that they are self-lubricating, i.e., no oil or grease lubricants are needed. This can be a major advantage in medical and precision equipment. A secondary important feature is the reduced friction and effective heat-dissipation due to the unique design of the invention with significant reduction in contact surfaces and friction, which significantly prolong the lifespan of the bearings. Another advantage of the present invention is the substantial reduction in audible noise due to the unique design. Furthermore, the invention allows the use of relatively low cost synthetic jewel segments in bearings.

First claim

What is claimed is:

1. A self-lubricating jewel bearing assembly, comprising:
a shaft having a cylindrical surface and a rotational axis;
a plurality of 5 or more facetted jewel segments made from a mineral of aluminum oxide, each facetted jewel segment of having a front surface and a top surface, wherein the plurality of facetted jewel segments are radially and axially secured in a stainless steel jewel carrier so configured to be radially evenly spaced around the shaft; and
a containment cup for housing the jewel carrier,

wherein the shaft comprising a collar for engaging the front surface of the each of the plurality of facetted jewel segments, and wherein each facetted jewel has a single contact point with the collar at the top surface of the facetted jewel segment.

2. The jewel bearing assembly of claim 1 , further comprising one or more support components placed between the containment cup and the jewel carrier providing flexible support to the axial direction of the shaft movement.

3. The jewel bearing assembly of claim 2 , further comprising one or more support components placed between the containment cup and the jewel carrier providing flexible support to the radial direction of the shaft movement.

4. The jewel bearing assembly of claim 3 , wherein the one or more support components are selected from coil springs, silicon rubber pads, shock absorbers and dashpot dampeners.

5. The jewel bearing assembly of claim 4 , wherein the mineral of aluminum oxide is natural.

6. The jewel bearing assembly of claim 4 , wherein the mineral of aluminum oxide is synthetic.

7. The jewel bearing assembly of claim 1 , wherein the jewel segments are made from Sapphire or Ruby gemstones.

8. The jewel bearing assembly of claim 1 , having 6 facetted jewel segments.

9. The jewel bearing assembly of claim 1 suitable for continued use without lubrication.

10. An article of manufacture comprising a jewel bearing assembly of claim 1 .

11. The article of manufacture of claim 10 , wherein the article is a motor, a turbine, a generator, a watch, a gyroscope, a compass, or a pump.

12. The article of manufacture of claim 11 , wherein the article is a heart pump.

13. The article of manufacture of claim 11 , wherein the article is a gyroscope.

14. The article of manufacture of claim 11 , wherein the article is a turbine.

Assignees

• Univ Massachusetts Medical School
• Univ Massachusetts

Inventors

• Hendricks Gregory

Classifications

• G04B31/008 Primary

  Jewel bearings (G04B31/04 takes precedence) · CPC title

• G01C17/00

  Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (using gyroscopic effect G01C19/00) · CPC title

• F16C17/04

  for axial load only · CPC title

• F16C23/02

  Sliding-contact bearings · CPC title

• H02K5/16

  Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields (magnetic bearings H02K7/09) · CPC title