Patent US2653852A successfully refreshed from Google Patents.
Patent US3680685A successfully refreshed from Google Patents.
US3680685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety conveyor
Assignee: Individual
•
Filing: 1970-03-27
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Granted: 1972-08-01
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Expires: 1990-03-27
Abstract
Abstract A safety conveyor including a gear reducer drive for powering a driving sprocket to drive an endless chain for load transporting purposes. The gear reducer drive rotates the driving sprocket through a drive shaft which includes a flexible coupling to permit elevation of the driving sprocket in response to a jam in the conveyor mechanism. Elevation of the driving sprocket automatically trips a micro switch to de-energize the driving motor to prevent damage to any conveyor system component.
Inventors
- 👤 Murray Halton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:20
CPC Classifications
B; B65; B65G; B65G23/00; B65G2811/00; B65G2811/09; B65G2811/091; B65G2811/093
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
218 words
In a safety conveyor suitable for transporting heavy loads of the type wherein an electric motor rotates a drive shaft through a motor driven gear reducer drive and the second end of the drive shaft connects to a driving sprocket to power a conveyor chain, the combination of A. a supporting frame; B. pivotal means pivotally connected to the frame, 1. said pivotal means carrying a bearing at one end thereof, a. the said bearing journalling to the said second end of the drive shaft, b. said pivotal means being urged from a first position to a second position by the driving sprocket upon the occurrence of a stoppage in the safety conveyor; C. elevating means associated with the said drive shaft, 1. said elevating means permitting elevating movement of the said second end of the drive shaft with respect to the said motor when the pivotal means are urged to the second position; and D. electrical current interrupting means responsive to pivotal movement of the said pivotal means to the second position, 1. said current interrupting means permitting electrical current to power the said motor when the pivot arm is in the first position, 2. said current interrupting means preventing electrical current flow to the said motor when the pivot arm moves to the said second position.
Claim 2
Dependent Claim
218 words
In a safety conveyor suitable for transporting heavy loads of the type wherein an electric motor rotates a drive shaft through a motor driven gear reducer drive and the second end of the drive shaft connects to a driving sprocket to power a conveyor chain, the combination of A. a supporting frame; B. pivotal means pivotally connected to the frame, 1. said pivotal means carrying a bearing at one end thereof, a. the said bearing journalling to the said second end of the drive shaft, b. said pivotal means being urged from a first position to a second position by the driving sprocket upon the occurrence of a stoppage in the safety conveyor; C. elevating means associated with the said drive shaft, 1. said elevating means permitting elevating movement of the said second end of the drive shaft with respect to the said motor when the pivotal means are urged to the second position; and D. electrical current interrupting means responsive to pivotal movement of the said pivotal means to the second position, 1. said current interrupting means permitting electrical current to power the said motor when the pivot arm is in the first position, 2. said current interrupting means preventing electrical current flow to the said motor when the pivot arm moves to the said second position.
Claim 3
Dependent Claim
22 words
said current interrupting means preventing electrical current flow to the said motor when the pivot arm moves to the said second position.
Claim 4
Dependent Claim
22 words
said current interrupting means preventing electrical current flow to the said motor when the pivot arm moves to the said second position.
Claim 5
Dependent Claim
36 words
The invention of claim 1 wherein the drive shaft elevating means include a flexible coupling, the said coupling permitting flexure of the said second end of the drive shaft with respect to the said first end.
Claim 6
Dependent Claim
28 words
The invention of claim 2 wherein the said elevating means position on the drive shaft intermediate the gear reducer drive and the second of the said drive shaft.
Claim 7
Dependent Claim
27 words
The invention of claim 1 wherein the said pivotal means are provided with initial load means to retard movement from the first position to the second position.
Claim 8
Dependent Claim
23 words
The invention of claim 4 wherein the said initial load means include a coil spring biasing between the pivotal means and the frame.
Claim 9
Dependent Claim
23 words
The invention of claim 4 wherein the said initial load means also serve to bias the said pivotal means to the first position.
Claim 10
Dependent Claim
42 words
The invention of claim 1 wherein the said electrical current interrupting means include a micro switch with a movable arm, the said arm having a first, current passing position and the said arm being spring biased to a second, current interrupting position.
Claim 11
Dependent Claim
37 words
The invention of claim 7 and an adjustable, movable arm contacting screw mounted upon the said pivotal means, said screw maintaining the movable arm in the first position when the pivotal means assume the said first position.
Claim 12
Dependent Claim
14 words
The invention of claim 1 wherein the said elevating means include a flexible coupling.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |