Patent US4904030A successfully refreshed from Google Patents.
US4904030A
Expired / Lapsed
US
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Rubber crawler
Assignee: Bridgestone Corp
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Filing: 1988-07-25
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Granted: 1990-02-27
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Expires: 2008-07-25
Abstract
Abstract A rubber crawler comprises an endless rubber crawler belt which extends over a sprocket and an idler tumbler of a vehicle, and has a running surface formed on its inner circumference and on which a plurality of rollers roll, and a plurality of cores each having a base embedded in the belt and arranged perpendicularly to the longitudinal direction of the crawler belt at a proper mutual spacing longitudinally of the belt. Each core has an extended core part. The extended core part has a surface corresponding to the running surface along which the rollers are rolled, the core surface being wider longitudinally of the crawler belt than the width of the base of the core.
Inventors
- 👤 Yoshihiko Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:22
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/20; B62D55/202; B62D55/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
An endless crawler for mounting on a vehicle having rollers, the crawler having interior entirely coplanar running surfaces for rolling upon by the rollers and comprising an endless rubber belt and a plurality of cores arranged in the belt at predetermined intervals longitudinally with respect to the belt, each of the cores having a base embedded in the belt below the running surfaces, guide projections formed on the base and projecting from the base to above the running surfaces and extensions formed on the base, extending from the base longitudinally with respect to the belt and each having an exposed surface constituting a portion of the running surfaces.
Claim 2
Dependent Claim
108 words
An endless crawler for mounting on a vehicle having rollers, the crawler having interior entirely coplanar running surfaces for rolling upon by the rollers and comprising an endless rubber belt and a plurality of cores arranged in the belt at predetermined intervals longitudinally with respect to the belt, each of the cores having a base embedded in the belt below the running surfaces, guide projections formed on the base and projecting from the base to above the running surfaces and extensions formed on the base, extending from the base longitudinally with respect to the belt and each having an exposed surface constituting a portion of the running surfaces.
Claim 3
Dependent Claim
37 words
An endless crawler according to claim 1, further comprising a respective concavity formed in the belt between each two projections which are mutually adjacent longitudinally of the belt, each concavity defining a discontinuity in the running surfaces.
Claim 4
Dependent Claim
27 words
An endless crawler according to claim 1, in which each concavity extends laterally and longitudinally relative to the belt to each side of said respective two projections.
Claim 5
Dependent Claim
70 words
An endless crawler according to claim 1, further comprising holes formed through the belt and adapted for engagement with a sprocket mounted on the vehicle, each respective one of the holes being located between the projections of each mutually adjacent two cores and each concavity extending laterally and longitudinally relative to the belt to a side of said projections closer to the hole than the other side of said projections.
References Cited (Backward Citations)
JPS522925A
Cited
JPS56120462A
Cited
JPS5932576A
Cited
EP0118912A2
Cited
US4678244A
Cited
JPS6175070A
Cited
JPS61122085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |