US3704631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable phase two shaft vibrator
Assignee: Rexnord Inc
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Filing: 1971-07-21
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Granted: 1972-12-05
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Expires: 1991-07-21
Abstract
Abstract A vibrating mechanism for a two-shaft screen. Eccentric shafts are supported by bearings in the side plates of the screen frame or in mounts above or below the side plates. Each shaft has a coaxial torque tube to which it is connected by a flexible elastic coupling. The torque tubes are interconnected by meshing gears. One of the eccentric shafts has a sheave for a drive belt. The flexible elastic couplings permit the shafts to be rotatably adjusted relative to their torque tubes while the screen is stopped. When the screen is started up again, the forces due to the eccentricity of the two shafts bear a new phase relationship. This results in a new direction for the reciprocating motion of the screen.
Inventors
- 👤 Walter R Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:43
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/10; B06B1/16; B06B1/161; B06B1/166; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A vibrating mechanism for a vibrating screen including: a pair of eccentric shafts, a drive means attached to one end of one of said shafts, and means connecting the opposite ends of said shafts to rotate said shafts in unison, said connecting means including: a torque tube coaxially positioned over each shaft, a gear attached to each torque tube and meshed with the gear of the other torque tube, and a flexible coupling joining each torque tube and its respective shaft.
Claim 2
Dependent Claim
81 words
A vibrating mechanism for a vibrating screen including: a pair of eccentric shafts, a drive means attached to one end of one of said shafts, and means connecting the opposite ends of said shafts to rotate said shafts in unison, said connecting means including: a torque tube coaxially positioned over each shaft, a gear attached to each torque tube and meshed with the gear of the other torque tube, and a flexible coupling joining each torque tube and its respective shaft.
Claim 3
Dependent Claim
18 words
The vibrating mechanism of claim 1 further characterized in that said flexible couplings are of the elastic type.
Claim 4
Dependent Claim
22 words
The vibrating mechanism of claim 1 further characterized in that means are provided for rotating the shafts relative to their torque tubes.
Claim 5
Dependent Claim
75 words
A vibrating mechanism for a vibrating screen including: a pair of eccentric shafts each supported on the side plates of a screen frame, a drive means attached to one end of one of said shafts, and means connecting the opposite ends of said shafts to rotate said shafts in unison, said connecting means including means to advance or retard one eccentric shaft relative to the other to alter the forcing direction of the vibrating screen.
Claim 6
Dependent Claim
75 words
A vibrating mechanism for a vibrating screen including: a pair of eccentric shafts each supported on the side plates of a screen frame, a drive means attached to one end of one of said shafts, and means connecting the opposite ends of said shafts to rotate said shafts in unison, said connecting means including means to advance or retard one eccentric shaft relative to the other to alter the forcing direction of the vibrating screen.
Claim 7
Dependent Claim
51 words
The vibrating mechanism of claim 4 further characterized in that said connecting means include: a torque tube coaxially positioned over each shaft, a gear attached to each torque tube and meshed with the gear of the other torque tube, and a flexible coupling joining each torque tube and its respective shaft.
Claim 8
Dependent Claim
18 words
The vibrating mechanism of claim 5 further characterized in that said flexible couplings are of the elastic type.
Claim 9
Dependent Claim
34 words
The vibrating mechanism of claim 5 further characterized in that said means to advance or retard one eccentric shaft relative to the other includes means to rotate said shaft relative to its torque tube.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |