Patent US4708218A successfully refreshed from Google Patents.
US4708218A
Expired / Lapsed
US
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Drive bogie for a crawler vehicle and a crawler mat for use therewith
Assignee: Velsa Oy
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Filing: 1986-04-22
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Granted: 1987-11-24
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Expires: 2006-04-22
Abstract
Abstract A drive bogie for a crawler vehicle. The bogie comprises carrying wheels freely rotatably suspended on a solid or divided bogie beam. An endless crawler mat passes over the carrying wheels. At least one drive roll is provided, which drives the crawler mat and which is arranged to press the crawler mat against the wheels. The crawler mat is substantially resilient in every direction. The carrying wheels are suspended on the bogie beam so that the resilient crawler mat is pressed between the drive roll and carring wheels forming part of the bogie construction and situated at the sides of the drive roll.
Inventors
- 👤 Markku Makela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:48
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/10; B62D55/12; B62D55/18; B62D55/20; B62D55/202; B62D55/24; B62D55/30
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
122 words
A drive bogie for a crawler vehicle, comprising: a bogie beam; at least two carrying wheels freely rotatably suspended from said bogies beam; an endless crawler mat passing over said wheels, said mat being constructed to be substantially resilient in every direction; a drive roll situated between said at least two carrying wheels to press said crawler mat from above and between said driver roll and said two carrying wheels which are situated at the sides of said drive roll; at least two intermediate members pivotally mounted upon said bogie beam, each wheel being suspended from a respective intermediate member, said bogies being resilient by the joint effect of said resilience of said crawler mat and said suspension of said carrying wheels.
Claim 2
Dependent Claim
122 words
A drive bogie for a crawler vehicle, comprising: a bogie beam; at least two carrying wheels freely rotatably suspended from said bogies beam; an endless crawler mat passing over said wheels, said mat being constructed to be substantially resilient in every direction; a drive roll situated between said at least two carrying wheels to press said crawler mat from above and between said driver roll and said two carrying wheels which are situated at the sides of said drive roll; at least two intermediate members pivotally mounted upon said bogie beam, each wheel being suspended from a respective intermediate member, said bogies being resilient by the joint effect of said resilience of said crawler mat and said suspension of said carrying wheels.
Claim 3
Dependent Claim
69 words
The bogie of claim 1, additionally comprising journalling points, each wheel being journalled to a respective intermediate member at a respective journalling point, and articulating points, each intermediate member being freely pivotally mounted to said bogie beam at a respective articulating point, wherein said bogie beam being pivotally mounted to a frame of the vehicle, with a center of pivoting thereof located between said first and second journalling points.
Claim 4
Dependent Claim
19 words
The bogies of claim 2, wherein said pivoting center is situated substantially underneath an axis of said drive roll.
Claim 5
Dependent Claim
57 words
The bogie of claim 1, wherein each said carrying wheel is constituted by a twin-wheel construction, and said drive roll having diameter which varies in length over an axial direction, said diameter being larger in a mid-region of said drive roll than at ends thereof, and said drive roll comprising a mantle curving in the axial direction.
Claim 6
Dependent Claim
14 words
The bogie of claim 1, wherein said intermediate members are inclined towards one another.
Claim 7
Dependent Claim
19 words
The bogie of claim 2, wherein said bogie beam is longer than a longitudinal distance between said journalling points.
Claim 8
Dependent Claim
15 words
The bogie of claim 6, wheein said journalling points are situated above said bogie beam.
Claim 9
Dependent Claim
22 words
The bogie of claim 1, wherein said intermediate members constitute the sole means of interconnection of said wheels with said bogie beam.
Claim 10
Dependent Claim
12 words
The bogie of claim 6, wherein said intermediate members are upwardly inclined.
Claim 11
Dependent Claim
27 words
The bogie of claim 1, wherein said crawler mat comprises at least one surface layer of elastic material, and an inner, at least partially resilient reinforcement layer.
Claim 12
Dependent Claim
27 words
The bogie of claim 4 additionally comprising an elastic coating being vulcanized onto said mantle of said drive roll, whereby cleaning of said drive roll is improved.
Claim 13
Dependent Claim
19 words
The bogie of claim 1, additionally comprising tensioning means for pushing said carrying wheels further apart from one another.
Claim 14
Dependent Claim
19 words
The bogie of claim 12, wherein said tensioning means are constituted by a spring affixed to said intermediate members.
Claim 15
Dependent Claim
21 words
The bogie of claim 12 wherein said tensioning means are constituted by a spring affixed to shafts of said carrying wheels.
Claim 16
Dependent Claim
27 words
The bogie of claim 2, wherein said bogie beam is divided into two supporting arms, each supporting arm mounted upon said pivoting center of said bogie beam.
Claim 17
Dependent Claim
33 words
The bogie of claim 1, comprising three carrying wheels arranged one after the other, with said drive roll being situated in a space between a first and second wheel of said three wheels.
Claim 18
Dependent Claim
24 words
The bogie of claim 16, additionally comprising a second roll situated in a second space between second and third wheels of said three wheels.
Claim 19
Dependent Claim
14 words
The bogie of claim 17, wherein said second roll is also a drive roll.
Claim 20
Dependent Claim
30 words
The bogie of claim 17, wherein said second roll is freely revolving and situated to press said crawler mat between said second roll and said second and third carrying wheels.
Claim 21
Dependent Claim
86 words
A drive bogie for a crawler vehicle, comprising: a bogie beam; at least two carrying wheels freely rotatably suspended from said bogie beam; an endless crawler mat passing over said wheels, said mat being constructed to be substantially resiliently in every direction; lateral guides resiliently affixed to said crawler mat; and a drive roll situated between said at least two carrying wheels to press said crawler mat between said driver roll and said two carrying wheels which are situated at the sides of said drive roll.
Claim 22
Dependent Claim
86 words
A drive bogie for a crawler vehicle, comprising: a bogie beam; at least two carrying wheels freely rotatably suspended from said bogie beam; an endless crawler mat passing over said wheels, said mat being constructed to be substantially resiliently in every direction; lateral guides resiliently affixed to said crawler mat; and a drive roll situated between said at least two carrying wheels to press said crawler mat between said driver roll and said two carrying wheels which are situated at the sides of said drive roll.
Claim 23
Dependent Claim
42 words
The bogie of claim 20, additionally comprising transverse projections extending along a surface of said crawler mat, and screw members for resiliently affixing said lateral guides to said crawler mat, said screw members extending through said crawler mat towards said transverse projections.
Claim 24
Dependent Claim
34 words
The bogie of claim 21, additionally comprising a recess formed in each said tranverse projection, and holes-extending through said crawler mat, each hole communicating with a respective recess for receiving a respective screw member.
Claim 25
Dependent Claim
41 words
The bogie of claim 21, wherein each said carrying wheel is constituted by a twin-wheel construction comprising first and second tires respectively, said- lateral guides passing between said respective first and second tires as said crawler mat passes about said wheels.
Claim 26
Dependent Claim
29 words
The bogie of claim 21, wherein said drive roll comprises a mantle and toothing attached to said mantle and situated to engage said transverse projections of said crawler mat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |