Patent US3701487A successfully refreshed from Google Patents.
US3701487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable drum device
Assignee: Individual
•
Filing: 1971-02-03
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Granted: 1972-10-31
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Expires: 1991-02-03
Abstract
Abstract A rotatable drum device, such as ball mill or the like, including acylindrical drum having an internal lining, external hooks encompassing the periphery of the drum adjacent the ends thereof and adapted to be supported on and rotated by pneumatic tires. The tracks are fastened to the lining by suitable bolts or rivets passing through larger dimensioned apertures in the drum to permit relative lateral movement between the drum, the lining and the bolts or rivets. Flexible and malleable material may be interposed between the outer periphery of the drum and the radially innermost surfaces of the tracks to compensate for radial deformations.
Inventors
- 👤 Guy Quesnel
- 👤 Francis Feugere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:07
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/22; B02C17/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A rotatable drum device comprising a cylindrical walled drum, an internal lining provided within the wall of the drum, external tracks about the exterior of the drum, coupling means for coupling the tracks directly to the lining through the walls of the drum, a plurality of driving pneumatic tires in driving cooperation with the tracks for supporting and causing rotation of the drum.
Claim 2
Dependent Claim
63 words
A rotatable drum device comprising a cylindrical walled drum, an internal lining provided within the wall of the drum, external tracks about the exterior of the drum, coupling means for coupling the tracks directly to the lining through the walls of the drum, a plurality of driving pneumatic tires in driving cooperation with the tracks for supporting and causing rotation of the drum.
Claim 3
Dependent Claim
30 words
A rotatable drum device according to claim 1 in which each track comprises a plurality of arcuately curved rolled sections and a circumferentially extending rolling strip encompassing said rolled sections.
Claim 4
Dependent Claim
22 words
A rotatable drum device according to claim 1 in which each track comprises a band of rubber hardened on its external surface.
Claim 5
Dependent Claim
30 words
A rotatable drum device according to claim 1 in which the coupling means pass through apertures in the wall of the drum of substantially larger dimensions than said coupling means.
Claim 6
Dependent Claim
30 words
A rotatable drum device according to claim 4 in which each track comprises a plurality of arcuately curved rolled sections and a circumferentially extending rolling strip encompassing said rolled sections.
Claim 7
Dependent Claim
22 words
A rotatable drum device according to claim 4 in which each track comprises a band of rubber hardened on its external surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |