# US 11,306,770 B2 · Roller assembly

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- Number: US 11,306,770 B2
- Document ID: US11306770B2
- Status: Granted
- Kind: B2
- Application number: 16/531,239
- Filed: 2019-08-05
- Published: 2019-11-21
- Granted: 2022-04-19
- Earliest claimed: 2014-11-17
- Assignees: Fivetech Technology Inc.
- Applicants: Fivetech Technology Inc.
- Inventors: Ting-Jui Wang
- Web page: https://patentgrep.com/patent/US11306770B2

## CPC

- A47B 88/437: Rollers for slides or guides
- F16C 13/006: {Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one}
- F16C 33/6637: {with liquid lubricant}
- F16C 33/6696: {with solids as lubricant, e.g. dry coatings, powder}
- B23P 15/003: {bearings (see also F16C33/00)}
- F16C 13/022: {supporting a hollow roll mantle rotating with respect to a yoke or axle}
- F16C 2314/72: Drawers
- A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B)
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)

## Abstract

A roller assembly includes a roller having an axial hole and an axle portion disposed in the axial hole to allow the roller to rotate about the axle portion; a sleeve with a first end disposed at a first end of the axle portion and a second end having a fitting portion, the fitting portion being fitted to a carried object, the sleeve has a first blocking portion positioned proximate to a first side of the roller to allow the roller to rotate between the first blocking portion and the fitting portion, wherein one of the axle portion, the axial hole and the first blocking portion has a substance conducive to reduction of friction between the roller and the sleeve.

## Claims

### Claim 1

A roller assembly, the assembly comprising:
a roller having an axial hole;
an axle portion being disposed in the axial hole to allow the cylindrical portion to rotate about the axle portion; and
a sleeve with a first end disposed at a first end of the axle portion and a second end having a fitting portion, the fitting portion being configured to fit to a carried object having a weight, a second end of the axle portion having a first blocking portion positioned proximate to a first side of the roller and a whole width of the roller that is less than a distance between the first blocking portion and said first end of the sleeve to allow the roller to rotate between the first blocking portion and the fitting portion, wherein one of the axle portion, the axial hole and the first blocking portion has a substance conducive to reduction of friction between the roller and the sleeve.

### Claim 2 (depends on 1)

The roller assembly of claim 1, further comprising a second blocking portion disposed at said second end of the axle portion and positioned proximate to a second side of the roller opposite said first side of the roller to allow the roller to rotate between the first blocking portion and the second blocking portion, the second blocking portion having a substance conducive to reduction of friction between the roller and the sleeve.

### Claim 3 (depends on 2)

The roller assembly of claim 2, wherein the substance conducive to reduction of friction on the second blocking portion is coated or mounted on the second blocking portion by spraying, soaking, adhesion, engagement, electroplating, smearing, adsorption or fastening.

### Claim 4 (depends on 1)

The roller assembly of claim 1, wherein the substance conducive to reduction of friction is liquid, solid, powder or aerosol.

### Claim 5 (depends on 1)

The roller assembly structure of claim 1, wherein the substance conducive to reduction of friction is oil, plastic, lubricant, pad or washer.

### Claim 6 (depends on 1)

The roller assembly of claim 1, wherein friction between the roller and the sleeve is less than friction between a roller surface contact object and the roller rolling on the roller surface contact object while the roller is rolling and bearing the weight of the carried object.

### Claim 7 (depends on 1)

The roller assembly of claim 1, wherein the substance conducive to reduction of friction is coated or mounted on one of the axle portion, the axial hole and the first blocking portion by spraying, soaking, adhesion, engagement, electroplating, smearing, adsorption or fastening.