US4125178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive mechanism
Assignee: Coal Industry Patents Ltd
•
Filing: 1976-12-23
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Granted: 1978-11-14
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Expires: 1996-12-23
Abstract
Abstract An auxiliary drive is provided for a drive mechanism for a conveyor, the mechanism including a brake and clutch arrangement designed to facilitate the starting and stopping of the conveyor. The auxiliary drive is conveniently mounted on the mechanism and has a drive motor driving a gear through an intermediate pinion, a gear wheel fixed to the driven stage of the mechanism. The intermediate pinion is movable to engage both the gear wheel and gear to transmit drive from the motor to the driven stage but is actuable to discontinue such drive. The auxiliary drive is intended to provide a means whereby the driven stage may be run at a speed lower than its normal operating speed, a particular application being to conveyors of the scraper chain type which at times require tensioning or detensioning of the chain for maintenance purposes, but at speeds lower than can be achieved using the main drive motor.
Inventors
- 👤 Harry Monks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:16
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/24; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19014
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
A drive mechanism for a conveyor including a casing and a primary motor; a driving stage mounted within the casing to be rotated by said motor; a driven stage mounted within the casing and adapted to drive a machine; a clutch interposed between the driving and driven stages and adapted drivably to connect the driven to the driving stage; a brake located on the driven stage and biased to its applied position; control means including a control valve, a pump adapted to deliver pressure fluid and drivably connected to the driving stage, the control valve being connected to receive pressure fluid from the pump; the control means being connected so that, in operation, after the motor is started, the brake will move to its released position before the driving and driven stages are drivably connected, means actuated by the pressure fluid to release the brake and to engage the clutch so as to connect the driving and driven stages; a member mounted on the driven stage for rotation therewith; an auxiliary motor mounted in association with the casing, and means for selectively engaging drive between the auxiliary motor and the said member.
Claim 2
Dependent Claim
192 words
A drive mechanism for a conveyor including a casing and a primary motor; a driving stage mounted within the casing to be rotated by said motor; a driven stage mounted within the casing and adapted to drive a machine; a clutch interposed between the driving and driven stages and adapted drivably to connect the driven to the driving stage; a brake located on the driven stage and biased to its applied position; control means including a control valve, a pump adapted to deliver pressure fluid and drivably connected to the driving stage, the control valve being connected to receive pressure fluid from the pump; the control means being connected so that, in operation, after the motor is started, the brake will move to its released position before the driving and driven stages are drivably connected, means actuated by the pressure fluid to release the brake and to engage the clutch so as to connect the driving and driven stages; a member mounted on the driven stage for rotation therewith; an auxiliary motor mounted in association with the casing, and means for selectively engaging drive between the auxiliary motor and the said member.
Claim 3
Dependent Claim
27 words
A drive mechanism according to claim 1 in which the member is a gear wheel attached to the driven stage, and the auxiliary motor drives a gear.
Claim 4
Dependent Claim
54 words
A drive mechanism according to claim 2 in which the means for selectively engaging the drive includes an intermediate pinion actuable to mesh with both the gear and the gear wheel to establish the drive between the auxiliary motor and the gear wheel and actuable to move out of mesh with the gear wheel.
Claim 5
Dependent Claim
34 words
A drive mechanism according to claim 3 including a housing in which the gear and the intermediate pinion are located, and a shaft, the intermediate pinion being rotatably and slidably mounted on the shaft.
Claim 6
Dependent Claim
23 words
A drive mechanism according to claim 4 in which the auxiliary motor is fixed to the housing which is attached to the casing.
Claim 7
Dependent Claim
44 words
A drive mechanism according to claim 4 in which the housing is provided internally thereof with a stub shaft, and a locking member is engageable with the stub shaft and the gear and is adapted upon engagement to lock the gear to the housing.
Claim 8
Dependent Claim
32 words
A drive mechanism according to claim 3 in which the casing has aperture means and the intermediate pinion protrudes through the aperture means to engage the member mounted on the driven stage.
References Cited (Backward Citations)
US3213711A
Cited
GB1221638A
Cited
GB1361465A
Cited
GB1399246A
Cited
GB1399245A
Cited
US3912058A
Cited
US3797623A
Cited
US3860100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |