Patent US4273000A successfully refreshed from Google Patents.
US4273000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive mechanism for a drum
Assignee: Bucher Guyer AG
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Filing: 1978-08-11
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Granted: 1981-06-16
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Expires: 1998-08-11
Abstract
Abstract A relatively large drum which is supported by rotation about a horizontal axis of rotation is driven by a drive mechanism. The above mechanism includes an energizable rotor that is resiliently and rotatably supported, and in frictional contact with the circumference of the drum, so as to rotate the drum when energized.
Inventors
- 👤 Alfred Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:04
CPC Classifications
F; F16; F16H; F16H13/00; F16H13/02; A; A23; A23N; A23N1/00; C; C12; C12M; C12M27/00; C12M27/10; F16C; F16C13/00; F16C13/02; F16C13/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
A drive mechanism, for use in rotating a relatively large drum rotatable about a substantially horizontal axis of rotation, comprising in combination: spring-support means, said drum being supported rotatably from said spring-support means, and drive means including an energizable rotor, first guide means resiliently and rotatably supporting said energizable motor from said spring-support means, said motor being in operative frictional contact with the circumference of said drum, for rotating said drum when energized, an energizing wheel in frictional driving connection with said energizable rotor for energizing it to revolve in a predetermined rotational direction, so as to drive said drum in a rotational direction opposite to said predetermined rotational direction, and second guide means rotatably supporting said energizing wheel from said spring-support means.
Claim 2
Dependent Claim
123 words
A drive mechanism, for use in rotating a relatively large drum rotatable about a substantially horizontal axis of rotation, comprising in combination: spring-support means, said drum being supported rotatably from said spring-support means, and drive means including an energizable rotor, first guide means resiliently and rotatably supporting said energizable motor from said spring-support means, said motor being in operative frictional contact with the circumference of said drum, for rotating said drum when energized, an energizing wheel in frictional driving connection with said energizable rotor for energizing it to revolve in a predetermined rotational direction, so as to drive said drum in a rotational direction opposite to said predetermined rotational direction, and second guide means rotatably supporting said energizing wheel from said spring-support means.
Claim 3
Dependent Claim
60 words
A drive mechanism according to claim 1, said drive means further comprising a second energizable rotor resiliently and rotatably supported on said support about an axis of rotation located on the other side of a plane passing through the axes of rotation of said drum and the first energizing wheel, and in frictional contact with the circumference of said drum.
Claim 4
Dependent Claim
111 words
A drive mechanism according to claim 1, wherein the energizable rotor includes a first shaft, and said energizing wheel includes a second shaft, and said first guide means includes a first elongated guide pivotably supported with one end thereof on said first shaft, and said second guide means includes a second elongated guide pivotably supported with one end thereof on said second shaft, the other ends of said guides being pivotably connected to one another, and resilient means supporting a portion of said second guide at a position spaced apart from said second shaft, thereby pressing the energizable rotor into frictional contact with said drum circumference and with said energizing wheel.
Claim 5
Dependent Claim
17 words
A drive mechanism according to claim 3, wherein said guides form an acute angle with one another.
Claim 6
Dependent Claim
12 words
A drive mechanism according to claim 1, wherein said rotor includes rollers.
Claim 7
Dependent Claim
68 words
A drive mechanism according to claim 5, wherein said energizable rotor includes a plurality of hubs of prearranged hub diameters, a friction ring of yieldably resilient material, and of a predetermined ring diameter disposed on each hub, and at least one spacer of a predetermined diameter separating two adjacent hubs from one another, said predetermined diameter being larger than said hub diameter, but less than said ring diameter.
Claim 8
Dependent Claim
19 words
A drive mechanism according to claim 5, wherein each friction ring is convergently tapered in a radially outward direction.
Claim 9
Dependent Claim
47 words
A drive mechanism according to claim 1, wherein said rotor has a predetermined width, and said drum has a circumference zone of increased external diameter in the region of the rotor width, whereby the rotor will be in frictional contact with the drum circumference at said zone.
Claim 10
Dependent Claim
28 words
A drive mechanism, as claimed in claim 1, further comprising resilient means urging said rotor into frictional rolling contact with both said energizing wheel and said drum circumference.
Claim 11
Dependent Claim
20 words
A drive mechanism, as claimed in claim 1, said rotor and said energizing wheel each being formed as a roll.
Claim 12
Dependent Claim
24 words
A drive mechanism according to claim 8, wherein said drum has a zone of increased wall thickness in the region of said rotor width.
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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) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |