US3696912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake for roller conveyors
Assignee: Ermanco Inc
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Filing: 1969-05-05
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Granted: 1972-10-10
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Expires: 1989-05-05
Abstract
Abstract A selectively operable brake for roller conveyors is described in which each roller is connected to a pulley beneath the pass line by a tensioned resilient drive belt and the pulleys are selectively stopped by interposing a sprag. The pulleys may either be positively arrested or allowed to frictionally slip for braking. Interposition of the sprag is controlled by means which permit the device to function as an accumulation conveyor while permitting accumulated objects to be released individually or in groups. The device is usable as a powered live-roller accumulation conveyor or without power as a gravity conveyor.
Inventors
- 👤 Fred J Fleischauer
- 👤 Theodore Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/22; B65G47/26; B65G47/261; B65G47/263
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
90 words
In a roller conveyor having a frame and a plurality of rollers carried by the frame to define a pass line, a roller brake comprising in combination, a plurality of pulleys disposed beneath the pass line and each connected to an individual one of a group of braked rollers by a tensioned resilient belt looped between each pulley and its associated roller, a rotatable sleeve drivably connected to each of the pulleys, and sprag means carried by the frame for selectively engaging the sleeve to arrest the sleeve and rollers.
Claim 2
Dependent Claim
90 words
In a roller conveyor having a frame and a plurality of rollers carried by the frame to define a pass line, a roller brake comprising in combination, a plurality of pulleys disposed beneath the pass line and each connected to an individual one of a group of braked rollers by a tensioned resilient belt looped between each pulley and its associated roller, a rotatable sleeve drivably connected to each of the pulleys, and sprag means carried by the frame for selectively engaging the sleeve to arrest the sleeve and rollers.
Claim 3
Dependent Claim
39 words
An accumulation conveyor including apparatus as defined in claim 1 and having trigger means disposed adjacent the conveyor pass line downstream of the braked rollers for actuating the sprag means in response to the presence of a conveyed object.
Claim 4
Dependent Claim
42 words
Apparatus as defined in claim 2 in which the trigger means includes a trigger roller carried by a trigger frame which is pivoted for downward movement upon encountering a conveyed object, and linkage means connecting the trigger frame to the sprag means.
Claim 5
Dependent Claim
64 words
Apparatus as defined in claim 2 in which the trigger means includes a trigger roller carried by a trigger frame which is pivoted for downward movement upon encountering a conveyed object, the sprag means being carried by the trigger frame, and the rotatable sleeve extending axially downstream of the braked rollers to a point adjacent the trigger frame for engagement with the sprag means.
Claim 6
Dependent Claim
55 words
Apparatus as defined in claim 2 in which the sprag means is carried by a shifting member for movement toward and away from operating proximity to the sleeve, and having activation means for selectively bringing the shifting member into position for engagement of the sprag means with the sleeve in response to the trigger means.
Claim 7
Dependent Claim
35 words
Apparatus as defined in claim 5 in which the group of braked rollers and associated downstream trigger means are disposed at the end of a series of unbraked rollers, for accumulation and selective slug runout.
Claim 8
Dependent Claim
37 words
An accumulation conveyor including a plurality of consecutively disposed apparatus as defined in claim 5 in which the activation means of each apparatus is jointly operable for effecting slug runout of a group of accumulated conveyed objects.
Claim 9
Dependent Claim
28 words
An accumulation conveyor including a plurality of consecutively disposed apparatus as defined in claim 5 in which each activation means is responsive to a preceding upstream trigger means.
Claim 10
Dependent Claim
101 words
An accumulation conveyor including a plurality of consecutively disposed apparatus as defined in claim 5 in which each activation means includes a trigger frame which is pivoted for downward movement upon encountering a conveyed object, said trigger frame carrying both the trigger roller associated with one group of contiguous braked rollers and the sprag means for the next succeeding downstream group of contiguous braked rollers, whereby the sprag means is engageable with the sleeve of said one group upon being triggered by the next succeeding downstream trigger roller only upon the simultaneous depression of the trigger roller of said one group.
Claim 11
Dependent Claim
36 words
Apparatus as defined in claim 1 where each pulley is separately carried by the sleeve in slippable frictional engagement, whereby the amount of driving force transmitted to each individual rolLer is limited by individual pulley slippage.
Claim 12
Dependent Claim
25 words
Apparatus as defined in claim 10 in which the trigger means is disposed at the end of a next succeeding downstream group of braked rollers.
Claim 13
Dependent Claim
24 words
Apparatus as defined in claim 10 in which the trigger means is disposed at the midpoint of a next succeeding group of braked rollers.
Claim 14
Dependent Claim
32 words
A live-roller conveyor including apparatus as defined in claim 1 and having a powered rotating drive shaft carried by the frame and disposed within the sleeve in slippable frictional driving engagement therewith.
Claim 15
Dependent Claim
150 words
A roller conveyor comprising a frame, a plurality of rollers rotatably mounted on said frame to define a pass line extending along the length of said conveyor, a drive shaft spaced from said rollers and extending transversely thereof, at least one sleeve rotatably mounted upon said drive shaft and juxtaposed to at least some of said rollers, said sleeve being frictionally coupled to said drive shaft to limit the amount of torque transmitted between said drive shaft and said some rollers, a pulley rotatably mounted on said sleeve, and an endless transmission belt for each of said some rollers looped about said pulley and about the associated one of said rollers, said pulley being frictionally coupled to limit further the amount of torque transmitted between said drive shaft and said rollers and to permit one of said some rollers to be stopped independently of the remainder of said some rollers.
Claim 16
Dependent Claim
150 words
A roller conveyor comprising a frame, a plurality of rollers rotatably mounted on said frame to define a pass line extending along the length of said conveyor, a drive shaft spaced from said rollers and extending transversely thereof, at least one sleeve rotatably mounted upon said drive shaft and juxtaposed to at least some of said rollers, said sleeve being frictionally coupled to said drive shaft to limit the amount of torque transmitted between said drive shaft and said some rollers, a pulley rotatably mounted on said sleeve, and an endless transmission belt for each of said some rollers looped about said pulley and about the associated one of said rollers, said pulley being frictionally coupled to limit further the amount of torque transmitted between said drive shaft and said rollers and to permit one of said some rollers to be stopped independently of the remainder of said some rollers.
Claim 17
Dependent Claim
26 words
The combination according to claim 14 wherein brake means are provided for engaging said sleeve to arrest the rotation of said sleeve and said some rollers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |