# US 11,027,755 B2 · Railroad car truck with warp restraints

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- Number: US 11,027,755 B2
- Document ID: US11027755B2
- Status: Granted
- Kind: B2
- Application number: 16/175,064
- Filed: 2018-10-30
- Published: 2019-06-06
- Granted: 2021-06-08
- Earliest claimed: 2017-12-04
- Assignees: Standard Car Truck Company
- Applicants: Standard Car Truck Company
- Inventors: Ronald D. Golembiewski; Andrew J. Morin
- Web page: https://patentgrep.com/patent/US11027755B2

## CPC

- B61F 5/383: {Adjustment controlled by non-mechanical devices, e.g. scanning trackside elements}
- B61F 3/08: without driven axles or wheels
- B61F 5/04: Bolster supports or mountings (side bearings B61F5/14)
- B61F 5/38: Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles
- B61F: RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES (for vehicles in general B60; axles or wheels B60B; vehicle tyres B60C)

## Abstract

A railroad car truck including a first side frame, a second side frame, a bolster, and a first plurality of warp restraints, each first warp restraint configured to prevent warping of the bolster relative to the side frames. Various embodiments include opposing bearings of each warp restraint that engage each other.

## Claims

### Claim 1

A railroad car truck comprising:
a first side frame;
a second side frame;
a bolster;
a first plurality of warp restraints positioned at first inner portions of the bolster and the first side frame, each of the plurality of first warp restraints including:
(a) a first bearing connected to the bolster and including a movable engagement pad with a removable wear member, and
(b) a second bearing connected to the first side frame, the second bearing including an engagement pad configured to be directly engaged by the removable wear member of the first bearing; and
a second plurality of warp restraints positioned at second inner portions of the bolster and the second side frame, each of the plurality of second warp restraints including:
(a) a first bearing connected to the bolster and including a removable wear member, and
(b) a second bearing connected to the second side frame, the second bearing including an engagement pad configured to be directly engaged by the removable wear member of the first bearing.

### Claim 2 (depends on 1)

The railroad car truck of claim 1, wherein the removable wear member of each first bearing of the first plurality of warp restraints is removable.

### Claim 3 (depends on 2)

The railroad car truck of claim 2, wherein the removable wear member of each first bearing of the second plurality of warp restraints is removable.

### Claim 4 (depends on 1)

The railroad car truck of claim 1, wherein the removable wear member of each first bearing of the first plurality of warp restraints is pivotable.

### Claim 5 (depends on 4)

The railroad car truck of claim 4, wherein the removable wear member of each first bearing of the second plurality of warp restraints is pivotable.

### Claim 6 (depends on 1)

The railroad car truck of claim 1, wherein for each of the first warp restraints, the first bearing extends perpendicularly from the bolster, and for each of the second warp restraints, the first bearing extends perpendicularly from the bolster, wherein the movable engagement pad of the first bearing is angled outwardly, angled inwardly, initially angled upwardly, initially angled downwardly, initially angled outwardly and upwardly, initially angled outwardly and downwardly, initially angled inwardly and upwardly, or initially angled inwardly and downwardly.

### Claim 7 (depends on 6)

The railroad car truck of claim 6, wherein for each of the first warp restraints, the second bearing extends perpendicularly from the first side frame, and for each of the second warp restraints, the second bearing extends perpendicularly from the second side frame.

### Claim 8 (depends on 1)

The railroad car truck of claim 1, wherein for each of the first warp restraints, the second bearing extends perpendicularly from the first side frame, and for each of the second warp restraints, the second bearing extends perpendicularly from the second side frame.

### Claim 9 (depends on 1)

The railroad car truck of claim 1, wherein the first inner portions are inwardly of an inner surface of the first side frame, and the second inner portions are inwardly of an inner surface of the second side frame.

### Claim 10

A railroad car truck comprising:
a first side frame;
a second side frame;
a bolster;
a first plurality of warp restraints positioned at a first inner portion of the bolster and the first side frame, each of the plurality of first warp restraints including:
(a) a first bearing connected to the bolster and including a rotatable engagement roller, and
(b) a second bearing connected to the first side frame, the second bearing including a removable engagement pad configured to be directly engaged by the engagement roller of the first bearing; and
a second plurality of warp restraints positioned at a second inner portion of the bolster and the second side frame, each of the plurality of second warp restraints including:
(a) a first bearing connected to the bolster and including a rotatable engagement roller, and
(b) a second bearing connected to the second side frame, the second bearing including a removable engagement pad configured to be directly engaged by the engagement roller of the first bearing.

### Claim 11 (depends on 10)

The railroad car truck of claim 10, wherein the rotatable engagement roller of the first bearing is angled outwardly, angled inwardly, initially angled upwardly, initially angled downwardly, initially angled outwardly and upwardly, initially angled outwardly and downwardly, initially angled inwardly and upwardly, or initially angled inwardly and downwardly.

### Claim 12 (depends on 10)

The railroad car truck of claim 10, wherein for each of the first warp restraints, the first bearing extends perpendicularly from the bolster, and for each of the second warp restraints, the first bearing extends perpendicularly from the bolster.

### Claim 13 (depends on 12)

The railroad car truck of claim 12, wherein for each of the first warp restraints, the second bearing extends perpendicularly from the first side frame, and for each of the second warp restraints, the second bearing extends perpendicularly from the second side frame.

### Claim 14 (depends on 10)

The railroad car truck of claim 10, wherein for each of the first warp restraints, the second bearing extends perpendicularly from the first side frame, and for each of the second warp restraints, the second bearing extends perpendicularly from the second side frame.

### Claim 15 (depends on 10)

The railroad car truck of claim 10, wherein the first inner portions are inwardly of an inner surface of the first side frame, and the second inner portions are inwardly of an inner surface of the second side frame.