US3783918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating drum with elastomeric pad-mounted supporting rings
Assignee: FIBRE MAKING PROCESSES Inc
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Filing: 1972-02-16
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Granted: 1974-01-08
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Expires: 1992-02-16
Abstract
Abstract A horizontally positioned cylindrical drum, such as for debarking logs, a pair of spaced-apart circumferential metal rings located longitudinally along the drum, and an elastomeric pad means between each of the rings and the drum holding the rings in position thereon. The drum can be supported by, and rotate on, trunnion wheels.
Inventors
- 👤 A Simpson
- 👤 F Egloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:17
CPC Classifications
B; B27; B27L; B27L1/00; B27L1/02; B27L1/025; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9464
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
Apparatus comprising: a horizontally positioned cylindrical drum having longitudinal troughs; a pair of spaced-apart circumferential metal rings located longitudinally along the drum; and elastomeric rods, in the troughs beneath the rings, compressed between each of the rings and the drum thereby holding the rings in position thereon without welding, riveting or bolting the rings on the drum.
Claim 2
Dependent Claim
57 words
Apparatus comprising: a horizontally positioned cylindrical drum having longitudinal troughs; a pair of spaced-apart circumferential metal rings located longitudinally along the drum; and elastomeric rods, in the troughs beneath the rings, compressed between each of the rings and the drum thereby holding the rings in position thereon without welding, riveting or bolting the rings on the drum.
Claim 3
Dependent Claim
24 words
Apparatus according to claim 1 in which the drum has longitudinal troughs and the elastomeric rods are positioned in the troughs beneath the rings.
Claim 4
Dependent Claim
74 words
Apparatus comprising: a horizontally positioned cylindrical drum; a pair of spaced-apart circumferential metal rings located longitudinally along the drum; said drum being externally smooth over a substantial area of the drum beneath the rings; and elastomeric rods positioned between the rings and the drum surface, said rods being compressed between each of the rings and the drum thereby holding the rings in position thereon without welding, riveting or bolting the rings on the drum.
Claim 5
Dependent Claim
74 words
Apparatus comprising: a horizontally positioned cylindrical drum; a pair of spaced-apart circumferential metal rings located longitudinally along the drum; said drum being externally smooth over a substantial area of the drum beneath the rings; and elastomeric rods positioned between the rings and the drum surface, said rods being compressed between each of the rings and the drum thereby holding the rings in position thereon without welding, riveting or bolting the rings on the drum.
Claim 6
Dependent Claim
14 words
Apparatus according to claim 3 in which the elastomeric rods are compressed by bolts.
Claim 7
Dependent Claim
93 words
Apparatus comprising: a horizontally positioned cylindrical drum; a pair of spaced-apart circumferential metal rings located longitudinally along the drum; metal stops joined to the drum and projecting therefrom in close proximity to each side of each ring to restrict movement of the rings longitudinal to the drum axis; an elastomeric pad means compressed between each of the rings and the drum thereby holding the rings in position thereon without welding, riveting or bolting the rings on the drum; and a pair of trunnion wheels supporting the drum in rotational contact with each ring.
Claim 8
Dependent Claim
93 words
Apparatus comprising: a horizontally positioned cylindrical drum; a pair of spaced-apart circumferential metal rings located longitudinally along the drum; metal stops joined to the drum and projecting therefrom in close proximity to each side of each ring to restrict movement of the rings longitudinal to the drum axis; an elastomeric pad means compressed between each of the rings and the drum thereby holding the rings in position thereon without welding, riveting or bolting the rings on the drum; and a pair of trunnion wheels supporting the drum in rotational contact with each ring.
Claim 9
Dependent Claim
33 words
Apparatus according to claim 5 in which the metal rings are substantially wider on the inside surface in contact with the pad means than the outermost surface in contact with the trunnion wheels.
Claim 10
Dependent Claim
22 words
Apparatus according to claim 5 in which the contacting surfaces of the rings and trunnion wheels with each other are hardened steel.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |