US3576242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking roller
Assignee: FMC Corp
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Filing: 1969-01-08
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Granted: 1971-04-27
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Expires: 1989-01-08
Abstract
Abstract A gravity roller conveyor includes at spaced intervals special braking rollers which have stationary brake drum attachments adjacent to one of their ends. A pair of brake shoes, located within each of the brake drums, is pivotally mounted to and rotatable with each braking roller. Each pair of shoes is interconnected by springs urging the shoes away from the cylindrical braking surface of the drum. As the speed of the conveyor rollers increases under a moving load, the centrifugal force acting upon the brake shoes propels them outwardly against the urging of their springs and into engagement with the braking surface of the drum in order to retard the speed of the associated braking roller and, therefore, the load upon the conveyor.
Inventors
- 👤 Harold J Mumma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:09
CPC Classifications
B; B65; B65G; B65G13/00; B65G13/075
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
257 words
A braking roller for use in a gravity roller conveyor to retard the speed of articles traveling thereon wherein said conveyor comprises a plurality of parallel cylindrical rollers mounted for free rotation between a pair of side frame members and wherein a braking roller is provided at spaced locations among said parallel rollers, said braking roller having a shaft axially affixed thereto for rotation therewith, said shaft extending through and being rotatably mounted within one of said side frame members, means rotatably mounting the other end of said braking roller to the other of said side frame members, a brake shoe pivotally connected to the end of said shaft which projects outwardly of said one side frame member, a brake drum fixed to said one side frame member and extending outwardly thereof about said brake shoe, and spring means for continuously urging said brake shoe radially inwardly, said brake shoe being pivotable outwardly under centrifugal force against the continual restraining force of said spring means when said roller is rotated and into engagement with said brake drum when said braking roller reaches a predetermined velocity to provide a retarding torque upon said shaft to thereby slow said roller, said spring means providing a continuously increasing restraining force upon said brake shoe as said brake shoe is moved radially outwardly reaching a maximum when said brake shoe engages said brake drum whereby said brake shoe will be caused to move out of engagement with said brake drum as the speed of said roLler decreases from said predetermined velocity.
Claim 2
Dependent Claim
257 words
A braking roller for use in a gravity roller conveyor to retard the speed of articles traveling thereon wherein said conveyor comprises a plurality of parallel cylindrical rollers mounted for free rotation between a pair of side frame members and wherein a braking roller is provided at spaced locations among said parallel rollers, said braking roller having a shaft axially affixed thereto for rotation therewith, said shaft extending through and being rotatably mounted within one of said side frame members, means rotatably mounting the other end of said braking roller to the other of said side frame members, a brake shoe pivotally connected to the end of said shaft which projects outwardly of said one side frame member, a brake drum fixed to said one side frame member and extending outwardly thereof about said brake shoe, and spring means for continuously urging said brake shoe radially inwardly, said brake shoe being pivotable outwardly under centrifugal force against the continual restraining force of said spring means when said roller is rotated and into engagement with said brake drum when said braking roller reaches a predetermined velocity to provide a retarding torque upon said shaft to thereby slow said roller, said spring means providing a continuously increasing restraining force upon said brake shoe as said brake shoe is moved radially outwardly reaching a maximum when said brake shoe engages said brake drum whereby said brake shoe will be caused to move out of engagement with said brake drum as the speed of said roLler decreases from said predetermined velocity.
Claim 3
Dependent Claim
46 words
A braking roller as set forth in claim 1 including a second brake shoe pivotally connected to said shaft and mounted radially opposite to said first-mentioned brake shoe, said spring means being connected between each of said brake shoes in order to urge them radially inwardly.
Claim 4
Dependent Claim
66 words
A braking roller as set forth in claim 2 wherein said brake drum includes an inner cylindrical braking surface and wherein said brake shoes are provided with arcuate outer surfaces for engagement with said braking surface, said brake shoes being pivotable outwardly so that they engage said braking surface over their entire arcuate surfaces even though said arcuate surfaces may be subject to uniform radial wear.
Claim 5
Dependent Claim
220 words
A braking roller for use in a gravity roller conveyor to retard the speed of articles traveling thereon wherein said conveyor comprises a plurality of parallel cylindrical rollers mounted for free rotation between a pair of side frame members and wherein a braking roller is provided at spaced locations among said parallel rollers, said braking roller having a shaft axially affixed thereto for rotation therewith, said shaft extending through and being rotatably mounted within one of said side frame members, means rotatably mounting the other end of said braking roller to the other of said side frame members, a brake shoe pivotally connected to said shaft, a brake drum fixed to said one side frame member about said brake shoe, a first support member fixed to said shaft and extending radially therefrom, said brake shoe being provided with a support arm extending from one end thereof, means for pivotally mounting said support arm at the outer end of said support member, a second support member rotatably mounted upon said shaft, and means for pivotally mounting said second support member to the other end of said brake shoe, said brake shoe being pivotable radially outward under centrifugal force when said roller is rotated to engage said brake drum and provide a retarding torque upon said shaft to thereby slow said roller.
Claim 6
Dependent Claim
220 words
A braking roller for use in a gravity roller conveyor to retard the speed of articles traveling thereon wherein said conveyor comprises a plurality of parallel cylindrical rollers mounted for free rotation between a pair of side frame members and wherein a braking roller is provided at spaced locations among said parallel rollers, said braking roller having a shaft axially affixed thereto for rotation therewith, said shaft extending through and being rotatably mounted within one of said side frame members, means rotatably mounting the other end of said braking roller to the other of said side frame members, a brake shoe pivotally connected to said shaft, a brake drum fixed to said one side frame member about said brake shoe, a first support member fixed to said shaft and extending radially therefrom, said brake shoe being provided with a support arm extending from one end thereof, means for pivotally mounting said support arm at the outer end of said support member, a second support member rotatably mounted upon said shaft, and means for pivotally mounting said second support member to the other end of said brake shoe, said brake shoe being pivotable radially outward under centrifugal force when said roller is rotated to engage said brake drum and provide a retarding torque upon said shaft to thereby slow said roller.
Claim 7
Dependent Claim
42 words
A braking roller as set forth in claim 4 wherein said means for pivotally mounting said second support member to said brake shoe comprises a link pivotally connected at its opposite ends to said second support member and to said brake shoe.
Claim 8
Dependent Claim
34 words
A braking roller as set forth in claim 5 including a tension spring connected between said support arm on said brake shoe and said second support member to bias said brake shoe radially inwardly.
Claim 9
Dependent Claim
134 words
A braking roller for use in a gravity roller conveyor to retard the speed of articles traveling thereon, said roller including a shaft projecting from one end of the body of the roller and being axially affixed to said roller body, a first support member fixed to said shaft, a second support member rotatably mounted upon said shaft, a brake shoe pivotally mounted upon said first support member, means pivotally connecting said brake shoe and said second support member, and a brake drum stationarily mounted upon the conveyor frame structure and being adapted to frictionally engage said brake shoe when the latter is urged radially outward under the centrifugal forces generated by the rotating roller body in order to provide a restraining force upon said shaft to retard the angular speed of said roller.
Claim 10
Dependent Claim
134 words
A braking roller for use in a gravity roller conveyor to retard the speed of articles traveling thereon, said roller including a shaft projecting from one end of the body of the roller and being axially affixed to said roller body, a first support member fixed to said shaft, a second support member rotatably mounted upon said shaft, a brake shoe pivotally mounted upon said first support member, means pivotally connecting said brake shoe and said second support member, and a brake drum stationarily mounted upon the conveyor frame structure and being adapted to frictionally engage said brake shoe when the latter is urged radially outward under the centrifugal forces generated by the rotating roller body in order to provide a restraining force upon said shaft to retard the angular speed of said roller.
Claim 11
Dependent Claim
40 words
A braking roller as set forth in claim 7 including a second brake shoe pivotally mounted upon said support member radially opposite of said first-mentioned brake shoe, and means pivotally connecting said second brake shoe with said second support member.
Claim 12
Dependent Claim
55 words
A braking roller as set forth in claim 8 wherein said first support member comprises an elongated member fixed at its midportion to said shaft, each of said brake shoes being provided with a support arm at one side thereof which is pivotally mounted at one of the outer ends of said first support member.
Claim 13
Dependent Claim
70 words
A braking roller as set forth in claim 9 wherein said second support member is rotatably mounted at its midportion to said shaft and includes a pair of oppositely directed radial extensions, a link pivotally connected to each of said radial extensions, the other end of each link being pivotally connected to one of said brake shoes at the side opposite to that on which said support arm is provided.
Claim 14
Dependent Claim
51 words
A braking roller as set forth in claim 10 including a tension spring attached at one end thereof to each radial extension of said second support member, the other end of each spring being connected to the brake shoe opposite of that to which the associated radial extension is pivotally attached.
References Cited (Backward Citations)
CH71099A
Cited
US3312320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |