US3797895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lower track roller for crawler track
Assignee: Nittai Lease Co Ltd
•
Filing: 1972-02-22
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Granted: 1974-03-19
•
Expires: 1992-02-22
Abstract
Abstract A lower track roller having a resilient buffer means positioned between the roller body and the tread ring.
Inventors
- 👤 K Tomizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:45
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/096; B62D55/0966
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
181 words
A lower track roller for use with a crawler track of a heavy construction machine, comprising: an axle; roller body means rotatably mounted on said axle; said roller body means having two pair of flanges, each pair of flanges including inner and outer outwardly extending flanges spaced relative to one another to form an annular channel; a pair of U-shaped resilient buffer rings, one of said resilient buffer rings positioned within each of said channels, each of said resilient buffer rings having a pair of outwardly extending flanges which contact and are compressively retained by said inner and outer flanges of said annular channels, said resilient buffer rings including an annular recess; and a pair of annular tread rings, each of said annular tread rings mounted, respectively, on one of said buffer rings, each of said annular tread rings having a pair of outwardly extending flanges which engage said flanges of said resilient buffer rings, said tread rings each including an annular seating ring depending therefrom, said annular seating rings being seated within said annular recesses of said resilient buffer rings.
Claim 2
Dependent Claim
181 words
A lower track roller for use with a crawler track of a heavy construction machine, comprising: an axle; roller body means rotatably mounted on said axle; said roller body means having two pair of flanges, each pair of flanges including inner and outer outwardly extending flanges spaced relative to one another to form an annular channel; a pair of U-shaped resilient buffer rings, one of said resilient buffer rings positioned within each of said channels, each of said resilient buffer rings having a pair of outwardly extending flanges which contact and are compressively retained by said inner and outer flanges of said annular channels, said resilient buffer rings including an annular recess; and a pair of annular tread rings, each of said annular tread rings mounted, respectively, on one of said buffer rings, each of said annular tread rings having a pair of outwardly extending flanges which engage said flanges of said resilient buffer rings, said tread rings each including an annular seating ring depending therefrom, said annular seating rings being seated within said annular recesses of said resilient buffer rings.
Claim 3
Dependent Claim
48 words
A lower track roller as claimed in claim 1 wherein: each of said resilient buffer rings includes a pair of identical resilient rings having step portions; said annular seating rings are received between each of said assembled pairs of resilient rings and seat on said juxtaposed step portions.
Claim 4
Dependent Claim
28 words
A lower track roller as claimed in claim 1 wherein: said flanges of said tread rings have portions which substantially overlie said flanges of said resilient buffer rings.
Claim 5
Dependent Claim
44 words
A lower track roller as claimed in claim 1 wherein: the outer flanges of said roller body means are adjustable for compressively retaining said resilient buffer rings between said inner and outer flanges of said respective pair of flanges of said roller body means.
Claim 6
Dependent Claim
159 words
A lower track roller for use with a crawler track of a heavy construction machine, comprising: an axle; roller body means rotatably mounted on said axle; said roller body means having inner and outer outwardly extending flanges arranged thereon; a resilient buffer means mounted on said roller body means and having a pair of outwardly extending flanges which contact and are retained by said inner and outer flanges of said roller body means, said resilient buffer means including a pair of identical resilient rings having step portions; each of said resilient rings having a plurality of annular grooves in its outer surface to absorb shock; said tread ring having a depending annular seating ring which is received between said assembled pair of resilient rings and seats on said juxtaposed step portions; at least one of said flanges of said roller body means being adjustable for compressively retaining said resilient buffer means between said flanges of said roller body means.
Claim 7
Dependent Claim
159 words
A lower track roller for use with a crawler track of a heavy construction machine, comprising: an axle; roller body means rotatably mounted on said axle; said roller body means having inner and outer outwardly extending flanges arranged thereon; a resilient buffer means mounted on said roller body means and having a pair of outwardly extending flanges which contact and are retained by said inner and outer flanges of said roller body means, said resilient buffer means including a pair of identical resilient rings having step portions; each of said resilient rings having a plurality of annular grooves in its outer surface to absorb shock; said tread ring having a depending annular seating ring which is received between said assembled pair of resilient rings and seats on said juxtaposed step portions; at least one of said flanges of said roller body means being adjustable for compressively retaining said resilient buffer means between said flanges of said roller body means.
Claim 8
Dependent Claim
153 words
A lower track roller for use wIth a crawler track of a heavy construction machine, comprising: an axle; roller body means rotatably mounted on said axle; said roller body means having inner and outer outwardly extending flanges arranged thereon; a resilient buffer means mounted on said roller body means and having a pair of outwardly extending flanges which contact and are compressively retained by said inner and outer flanges of said roller body means, said resilient buffer means including an annular channel; a tread ring mounted on said resilient buffer means and having a pair of outwardly extending flanges at its ends which engage said flanges of said resilient buffer means, said tread ring including an annular seating ring depending therefrom, said annular seating ring being seated in said annular channel; and said resilient buffer means is a resilient ring having a plurality of annular grooves at its outer surface to absorb shock.
Claim 9
Dependent Claim
153 words
A lower track roller for use wIth a crawler track of a heavy construction machine, comprising: an axle; roller body means rotatably mounted on said axle; said roller body means having inner and outer outwardly extending flanges arranged thereon; a resilient buffer means mounted on said roller body means and having a pair of outwardly extending flanges which contact and are compressively retained by said inner and outer flanges of said roller body means, said resilient buffer means including an annular channel; a tread ring mounted on said resilient buffer means and having a pair of outwardly extending flanges at its ends which engage said flanges of said resilient buffer means, said tread ring including an annular seating ring depending therefrom, said annular seating ring being seated in said annular channel; and said resilient buffer means is a resilient ring having a plurality of annular grooves at its outer surface to absorb shock.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |