# US 9,433,151 B2 · Caster wheel assembly of a pickup for an agricultural machine

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- Number: US 9,433,151 B2
- Document ID: US9433151B2
- Status: Granted
- Kind: B2
- Application number: 14/432,892
- Filed: 2013-09-27
- Published: 2015-09-10
- Granted: 2016-09-06
- Earliest claimed: 2012-10-01
- Assignees: CHN Industrial America, LLC
- Applicants: CNH Industrial America LLC
- Inventors: Lukasz Ziembicki
- Web page: https://patentgrep.com/patent/US9433151B2

## CPC

- A01D 89/004: {Mountings, e.g. height adjustment, wheels, lifting devices}
- B60B 33/0005: {characterised by mounting method}
- B60B 33/0021: {in the form of a mounting pin}
- B60B 33/0039: {Single wheels}
- B60B 33/006: {characterised by details of the swivel mechanism}
- B60B 33/0076: {the swivel axis being offset laterally from wheel center plane}
- B60B 33/045: {mounted resiliently, by means of dampers}
- B60Y 2200/22: Agricultural vehicles
- A01D: HARVESTING; MOWING
- B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY

## Abstract

A caster wheel assembly of a pickup for an agricultural machine, comprising a wheel on a carrier shaft mounted rotatably within a bushing of a pickup arm. The wheel is biased by a spring to be oriented in a predetermined direction relative to the pickup arm. The spring is a helical spring mounted coaxially with the carrier shaft between the wheel and the pickup arm.

## Claims

### Claim 1

A caster wheel assembly of a pickup for an agricultural machine, comprising:
a wheel on a carrier shaft mounted rotatably within a bushing of a pickup arm, the wheel biased by a spring to be oriented in a predetermined direction relative to the pickup arm, wherein the spring is a helical spring positioned coaxially with the carrier shaft and attached at its one end to the carrier shaft and at its second end to the bushing.

### Claim 2 (depends on 1)

The caster wheel assembly according to claim 1, wherein the helical spring is positioned above the pickup arm.

### Claim 3 (depends on 1)

The caster wheel assembly according to claim 1, wherein the helical spring is positioned below the pickup arm.

### Claim 4 (depends on 1)

The caster wheel assembly according to claim 1, wherein the helical spring is positioned inside the carrier shaft.

### Claim 5 (depends on 1)

The caster wheel assembly according to claim 1, wherein the helical spring is positioned outside the carrier shaft.

### Claim 6 (depends on 5)

The caster wheel assembly according to claim 5, wherein the helical spring is protected by a cover.

### Claim 7 (depends on 1)

The caster wheel assembly according to claim 1, wherein the helical spring is positioned inside the bushing housing.

### Claim 8 (depends on 1)

The caster wheel assembly according to claim 1, wherein the helical spring is attached releasably.

### Claim 9 (depends on 1)

The caster wheel assembly according to claim 1, wherein the helical spring allows the wheel to rotate by at least 270 degrees to at least 360 degrees.

### Claim 10 (depends on 1)

The caster wheel assembly according to claim 1, wherein the point of contact between the wheel and the ground lies in line with the projection of the axis of the carrier shaft.

### Claim 11 (depends on 1)

The caster wheel assembly according to claim 1, wherein the point of contact between the wheel and the ground is offset from the point of the projection of the axis of the carrier shaft onto the ground.