Patent US3832018A successfully refreshed from Google Patents.
US3832018A
Expired / Lapsed
US
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Track pin retaining insert
Assignee: Caterpillar Inc
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Filing: 1973-08-27
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Granted: 1974-08-27
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Expires: 1993-08-27
Abstract
Abstract A track-type tractor comprises an endless track assembly having a plurality of shoes articulated together by a pair of laterally spaced link assemblies. Each link assembly comprises a pair of adjacent links pivotally mounted together by a pin and bushing assembly. An annular, hardened insert is press-fitted between the pin and an outboard one of the links to prevent loosening thereof during tractor operation.
Inventors
- 👤 D Nelson
- 👤 R Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:11
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/088; B62D55/0887; B62D55/18; B62D55/20; B62D55/205
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
An articulated track assembly comprising a plurality of closely coupled ground-engaging track shoes, a pair of laterally spaced articulated link assemblies, each comprising a pair of circumferentially adjacent links, connected to said shoes, and common pivot means pivotally mounting each pair of links of each link assembly together to form an articulated track assembly, said pivot means comprising a pin, a cylindrical bearing bushing mounted on said pin and having an inboard link of each pair of links secured thereon, and a hardened annular insert press-fitted between each end of said pin and a respective outboard link of each pair of links and providing the sole securance therebetween.
Claim 2
Dependent Claim
108 words
An articulated track assembly comprising a plurality of closely coupled ground-engaging track shoes, a pair of laterally spaced articulated link assemblies, each comprising a pair of circumferentially adjacent links, connected to said shoes, and common pivot means pivotally mounting each pair of links of each link assembly together to form an articulated track assembly, said pivot means comprising a pin, a cylindrical bearing bushing mounted on said pin and having an inboard link of each pair of links secured thereon, and a hardened annular insert press-fitted between each end of said pin and a respective outboard link of each pair of links and providing the sole securance therebetween.
Claim 3
Dependent Claim
27 words
The track assembly of claim 1 further comprising annular sealing means confined between each end of said bearing bushing, a respective insert and a respective outboard link.
Claim 4
Dependent Claim
27 words
The track assembly of claim 1 wherein an outer end of each insert is substantially flush with respect to an outer surface of a respective outboard link.
Claim 5
Dependent Claim
29 words
The track assembly of claim 1 wherein a radial flange is integrally formed on an end of each insert and abuts an outer surface of a respective outboard link.
Claim 6
Dependent Claim
13 words
The track assembly of claim 1 wherein each of said inserts is cup-shaped.
Claim 7
Dependent Claim
32 words
The track assembly of claim 1 wherein each insert has a hardness which is substantially greater than the hardness of a bore area of a respective outboard link mounting such insert therein.
Claim 8
Dependent Claim
33 words
The track assembly of claim 6 wherein each insert has a Rockwell hardness of from C35 to 40 and each of said bore areas has a Rockwell hardness of from C25 to 30.
Claim 9
Dependent Claim
55 words
The track assembly of claim 1 in which said outboard links individually provide an insert bore of a size sufficiently smaller in diameter then the diameter of said press-fittted insert in order to permit simultaneous radial outward growth of the insert with the bore without any appreciable impairment of its retentive effect on the pin.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |