US3913987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Track type tractors having resiliently mounted track roller assemblies
Assignee: Caterpillar Inc
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Filing: 1974-02-21
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Granted: 1975-10-21
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Expires: 1994-02-21
Abstract
Abstract An improved truck for track type tractors having resiliently mounted track roller assemblies. The truck includes an elongated frame journalling sprockets at opposite ends about which an endless track is trained. A plurality of track roller assemblies engage the lower run of the track and are resiliently secured to the frame to cushion vertical movement of the track roller assemblies. A linkage system or, in the alternative, a cable system, interconnects the track roller assemblies and the frame to restrain the track roller assemblies against longitudinal shifting relative to the frame. Depending side members secured to the frame are in sliding contact with opposite ends of each track roller assembly to restrain the same against side-to-side shifting movement.
Inventors
- 👤 Arden E Baldwin
- 👤 Harold W Carlson
- 👤 Bruce W Miers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:24
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/104; B62D55/108
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
A truck for a track type tractor comprising: an elongated truck frame; a pair of track sprockets, one journalled on said frame at each end thereof; an endless track trained about said sprockets and said truck frame; a plurality of track roller assemblies engaging the upper surface of the lower run of said track at longitudinally spaced points between said sprockets; a plurality of resilient means, one for each track roller assembly, interconnecting the associated track roller assembly and said frame for cushioning, in a vertical direction, movement of said track roller assemblies; and non-resilient means interconnecting said track roller assemblies and said frame for firmly restraining said track roller assemblies against longitudinal movement relative to said frame while allowing movement of said track roller assemblies relative to said frame in a vertical direction, said restraining means being elongated in the direction of elongation of said frame.
Claim 2
Dependent Claim
147 words
A truck for a track type tractor comprising: an elongated truck frame; a pair of track sprockets, one journalled on said frame at each end thereof; an endless track trained about said sprockets and said truck frame; a plurality of track roller assemblies engaging the upper surface of the lower run of said track at longitudinally spaced points between said sprockets; a plurality of resilient means, one for each track roller assembly, interconnecting the associated track roller assembly and said frame for cushioning, in a vertical direction, movement of said track roller assemblies; and non-resilient means interconnecting said track roller assemblies and said frame for firmly restraining said track roller assemblies against longitudinal movement relative to said frame while allowing movement of said track roller assemblies relative to said frame in a vertical direction, said restraining means being elongated in the direction of elongation of said frame.
Claim 3
Dependent Claim
40 words
A truck according to claim 1 wherein said restraining means comprises two cable sections secured to each other at adjacent ends by resilient means, at opposite ends to said truck frame and intermediate their ends to said track roller assemblies.
Claim 4
Dependent Claim
38 words
A truck according to claim 2 wherein said truck frame includes depending side members extending downwardly into side-by-side relation with said track roller assemblies to restrain said track roller assemblies against side-to-side movement relative to said main frame.
Claim 5
Dependent Claim
42 words
A truck according to claim 1 further including means for restraining said track roller assemblies against side-to-side movement relative to said frame including downwardly extending side members on said frame, said side members depending into side-by-side relationship with said track roller assemblies.
Claim 6
Dependent Claim
13 words
A truck according to claim 1 wherein said restraining means comprise linkage means.
Claim 7
Dependent Claim
22 words
The truck of claim 5 wherein said linkage means comprise a cable attached to said frame and to said track roller assemblies.
Claim 8
Dependent Claim
26 words
The truck of claim 5 wherein said linkage means comprise a plurality of individual links pivotally connected to each other and to said track roller assemblies.
Claim 9
Dependent Claim
66 words
A truck according to claim 7 wherein at least one of said links is a bell crank having one end connected to one of another of said links and one of said track roller assemblies and an opposite end disposed in side-by-side relation with another of said links to restrain said other link against side-to-side movement to thereby restrain side-to-side movement of said track roller assemblies.
Claim 10
Dependent Claim
29 words
A truck according to claim 8 wherein said truck frame includes depending side members extending downwardly into side-by-side relation with said links to further restrain the same against side-to-side-movement.
References Cited (Backward Citations)
US3336087A
Cited
US3695737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |