# US 9,434,429 B2 · Rubber crawler

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- Number: US 9,434,429 B2
- Document ID: US9434429B2
- Status: Granted
- Kind: B2
- Application number: 14/403,276
- Filed: 2013-05-16
- Published: 2015-04-09
- Granted: 2016-09-06
- Earliest claimed: 2012-05-25
- Assignees: Bridestone Corporation
- Applicants: Bridgestone Corporation
- Inventors: Takashi Mizusawa
- Web page: https://patentgrep.com/patent/US9434429B2

## CPC

- B62D 55/244: {Moulded in one piece, with either smooth surfaces or surfaces having projections, e.g. incorporating reinforcing elements}
- B62D 55/242: {The flexible band being semi-rigid for resisting back-flexing and contributing to spring the vehicle}
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

A rubber crawler includes a rubber belt, a main cord layer that is incorporated within the rubber belt and includes a main cord extending around the crawler circumferential direction, a bias cord layer that is incorporated further to the crawler circumferential outside than the main cord layer and is configured from bias cords extending at an angle with respect to the crawler circumferential direction, a bias cord layer that is interposed between the bias cord layer and the main cord layer, and is configured from bias cords extending at an angle with respect to the crawler circumferential direction so as to intersect the first bias cords, and a reinforcement cord layer that is interposed between the bias cord layer and the bias cord layer, and is configured from reinforcement cords extending in the crawler width direction.

## Claims

### Claim 1

A rubber crawler comprising:
an endless rubber body that is trained around a plurality of wheels;
a main cord layer that is incorporated within the rubber body and includes a main cord extending around a rubber body circumferential direction;
a first bias cord layer that is incorporated within the rubber body further to a rubber body circumferential outside than the main cord layer and is configured from first bias cords arranged side-by-side around the rubber body circumferential direction, the first bias cords extending at an angle with respect to the rubber body circumferential direction;
a second bias cord layer that is interposed between the first bias cord layer and the main cord layer, and is configured from second bias cords arranged side-by-side around the rubber body circumferential direction and extending at an angle with respect to the rubber body circumferential direction so as to intersect the first bias cords; and
a first reinforcement cord layer that is interposed between the first bias cord layer and the second bias cord layer, and is configured from reinforcement cords extending in a rubber body width direction, the reinforcement cords arranged side-by-side around the rubber body circumferential direction,
wherein a second reinforcement cord layer is interposed between the second bias cord layer and the main cord layer.

### Claim 2 (depends on 1)

The rubber crawler of claim 1, wherein a third reinforcement cord layer is incorporated at a rubber body circumferential outside of the first bias cord layer.

### Claim 3 (depends on 1)

The rubber crawler of claim 1, wherein the first bias cords and the second bias cords are angled in mutually opposing directions from each other with respect to the rubber body circumferential direction.