US4049089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic brake assembly
Assignee: SN OPERATING Co Inc
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Filing: 1976-07-06
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Granted: 1977-09-20
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Expires: 1996-07-06
Abstract
Abstract An electromagnetic brake assembly is provided for adjusting the axial distance or gap between the brake wheel and pressure plate assembly during rotation of the brake wheel, without increasing the force exerted by the pressure plate assembly on the brake wheel or varying the force exerted by the electromagnetic means on the pressure plate assembly. Preferably, the pressure plate assembly is comprised of a pressure ring for engaging a brake liner on movement of the pressure plate assembly toward the brake wheel, and a brake armature for engaging an electromagnetic means on movement of the pressure plate assembly away from the brake wheel. Such gap control means is in turn comprised of means for selectively moving the pressure ring relative to the brake armature, most desirably by rotating the pressure ring and brake armature relative to each other. Preferably, the brake assembly also has cooling means for channelling air through passageways adjacent the brake liner, preferably by power provided by the drive shaft to be braked and most desirably by stator means adjacent the periphery of the brake wheel forcing said air through said passageways adjacent the brake liner.
Inventors
- 👤 Frederick Stanley Rundle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:46
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/24; F16D55/26; F16D55/28; F16D59/00; F16D59/02; F16D65/00; F16D65/38; F16D65/40; F16D65/42; F16D65/46; F16D65/78; F16D65/84; F16D65/847; F16D2055/0004; F16D2055/0058; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
193 words
An electromagnetic brake assembly comprising: A. a rotatable brake wheel fixed to a shaft which has the rotation thereof selectively braked by the brake assembly; B. a pressure ring nonrotatably mounted axially a given distance from said brake wheel during operational rotation of said shaft and adapted to axially move toward and away from the brake wheel; C. a brake armature mounted axially from said pressure ring and adapted to axially move in fixed relation with respect to said pressure ring during operational rotation of said shaft; D. at least one brake liner adapted to fricationally engage between the brake wheel and pressure ring when the pressure ring is moved axially toward the brake wheel; E. an electromagnetic means mounted axially from the brake armature for engaging the brake armature to move the pressure ring away from the brake wheel; F. biasing means for urging the brake armature and pressure ring toward the brake wheel to engage the brake liner between the brake wheel and pressure ring and brake the rotation of the brake wheel; and G. gap control means for adjusting the axial distance between the brake wheel and the pressure ring.
Claim 2
Dependent Claim
193 words
An electromagnetic brake assembly comprising: A. a rotatable brake wheel fixed to a shaft which has the rotation thereof selectively braked by the brake assembly; B. a pressure ring nonrotatably mounted axially a given distance from said brake wheel during operational rotation of said shaft and adapted to axially move toward and away from the brake wheel; C. a brake armature mounted axially from said pressure ring and adapted to axially move in fixed relation with respect to said pressure ring during operational rotation of said shaft; D. at least one brake liner adapted to fricationally engage between the brake wheel and pressure ring when the pressure ring is moved axially toward the brake wheel; E. an electromagnetic means mounted axially from the brake armature for engaging the brake armature to move the pressure ring away from the brake wheel; F. biasing means for urging the brake armature and pressure ring toward the brake wheel to engage the brake liner between the brake wheel and pressure ring and brake the rotation of the brake wheel; and G. gap control means for adjusting the axial distance between the brake wheel and the pressure ring.
Claim 3
Dependent Claim
28 words
An electromagnetic brake assembly as set forth in claim 1 wherein: said gap control means comprises means for selectively moving the pressure ring relative to the brake armature.
Claim 4
Dependent Claim
50 words
An electromagnetic brake assembly as set forth in claim 2 wherein: said gap control means comprises means for rotating the pressure ring and the brake armature relative to each other, and retainer means for preventing relative rotation of the pressure ring and brake armature during operation of the brake assembly.
Claim 5
Dependent Claim
44 words
An electromagnetic brake assembly as set forth in claim 1 comprising in addition: an indicator means for monitoring said given distance between the brake wheel and pressure ring during operational rotation of the shaft to determine need for readjustment by the gap control means.
Claim 6
Dependent Claim
23 words
G. cooling means for channelling air through passageways that include openings through the brake wheel, said openings being adjacent to the brake liner.
Claim 7
Dependent Claim
23 words
G. cooling means for channelling air through passageways that include openings through the brake wheel, said openings being adjacent to the brake liner.
Claim 8
Dependent Claim
23 words
An electromagnetic brake assembly as set forth in claim 5 wherein: said cooling means is provided by rotation of the shaft during operation.
Claim 9
Dependent Claim
35 words
An electromagnetic brake assembly as set forth in claim 6 wherein: said cooling means comprises stator means adjacent the periphery of the brake wheel for forcing said air through said passageway adjacent the brake liner.
Claim 10
Dependent Claim
199 words
An electromagnetic brake assembly comprising: A. a rotatable brake wheel fixed to a shaft which has the rotation thereof selectively braked by the brake assembly; B. a pressure ring nonrotatably mounted, axially a given distance from said brake wheel during operational rotation of said shaft and adapted to axially move toward and away from the brake wheel; C. a brake armature mounted axially from said pressure ring and adapted to axially move in fixed relation with respect to said pressure ring during operational rotations of said shaft; D. at least one brake liner adapted to frictionally engage between said brake wheel and pressure ring when the pressure ring is moved axially toward the brake wheel; E. a mechanical bias means for urging the brake armature and pressure ring toward the brake wheel to engage the brake liner between the brake wheel and pressure ring and brake the rotation of the brake wheel; F. an electromagnetic means mounted axially from the brake armature for selectively engaging the brake armature to urge the pressure ring away from the brake wheel against the bias means; and G. a means for adjusting the axial distance between the brake wheel and the pressure ring.
Claim 11
Dependent Claim
199 words
An electromagnetic brake assembly comprising: A. a rotatable brake wheel fixed to a shaft which has the rotation thereof selectively braked by the brake assembly; B. a pressure ring nonrotatably mounted, axially a given distance from said brake wheel during operational rotation of said shaft and adapted to axially move toward and away from the brake wheel; C. a brake armature mounted axially from said pressure ring and adapted to axially move in fixed relation with respect to said pressure ring during operational rotations of said shaft; D. at least one brake liner adapted to frictionally engage between said brake wheel and pressure ring when the pressure ring is moved axially toward the brake wheel; E. a mechanical bias means for urging the brake armature and pressure ring toward the brake wheel to engage the brake liner between the brake wheel and pressure ring and brake the rotation of the brake wheel; F. an electromagnetic means mounted axially from the brake armature for selectively engaging the brake armature to urge the pressure ring away from the brake wheel against the bias means; and G. a means for adjusting the axial distance between the brake wheel and the pressure ring.
Claim 12
Dependent Claim
28 words
An electromagnetic brake assembly as set forth in claim 8 wherein: said gap control means comprises means for selectively moving the pressure ring relative to the brake armature.
Claim 13
Dependent Claim
50 words
An electromagnetic brake assembly as set forth in claim 9 wherein: said gap control means comprises means for rotating the pressure ring and the brake armature relative to each other, and retainer means for preventing relative rotation of the pressure ring and brake armature during operation of the brake assembly.
Claim 14
Dependent Claim
45 words
An electromagnetic brake assembly as set forth in claim 8 comprising in addition: an indicator means for monitoring said given distance between the brake wheel and pressure plate assembly during operational rotation of the shaft to determine need for readjustment by the gap control means.
Claim 15
Dependent Claim
36 words
An electromagnetic brake assembly as set forth in claim 8 comprising in addition: G. cooling means for channelling air through passageways that include openings through the brake wheel, said openings being adjacent to the brake liner.
Claim 16
Dependent Claim
23 words
An electromagnetic brake assembly as set forth in claim 12 wherein: said cooling means is provided by rotation of the shaft during operation.
Claim 17
Dependent Claim
35 words
An electromagnetic brake assembly as set forth in claim 13 wherein: said cooling means comprises stator means adjacent the periphery of the brake wheel for forcing said air through said passageway adjacent the brake liner.
Claim 18
Dependent Claim
199 words
An electromagnetic brake assembly comprising: A. a rotatable brake wheel fixed to a shaft which has the rotation thereof selectively braked by the brake assembly; B. a pressure ring nonrotatably mounted axially a given distance from said brake wheel during operational rotation of said shaft and adapted to axially move toward and away from the brake wheel; C. a brake armature mounted axially from said pressure ring and adapted to axially move in fixed relation with respect to said pressure ring during operational rotation of said shaft; D. at least one brake liner adapted to frictionally engage between the brake wheel and pressure ring when the pressure ring is moved axially toward the brake wheel; E. an electromagnetic means mounted axially from the brake armature for engaging the brake armature to move the pressure ring away from the brake wheel; F. biasing means for urging the brake armature and pressure ring toward the brake wheel to engage the brake liner between the brake wheel and pressure ring and brake the rotation of the brake wheel; and G. cooling means for channelling air through passageways that include openings through the brake wheel, said openings being adjacent to the brake liner.
Claim 19
Dependent Claim
199 words
An electromagnetic brake assembly comprising: A. a rotatable brake wheel fixed to a shaft which has the rotation thereof selectively braked by the brake assembly; B. a pressure ring nonrotatably mounted axially a given distance from said brake wheel during operational rotation of said shaft and adapted to axially move toward and away from the brake wheel; C. a brake armature mounted axially from said pressure ring and adapted to axially move in fixed relation with respect to said pressure ring during operational rotation of said shaft; D. at least one brake liner adapted to frictionally engage between the brake wheel and pressure ring when the pressure ring is moved axially toward the brake wheel; E. an electromagnetic means mounted axially from the brake armature for engaging the brake armature to move the pressure ring away from the brake wheel; F. biasing means for urging the brake armature and pressure ring toward the brake wheel to engage the brake liner between the brake wheel and pressure ring and brake the rotation of the brake wheel; and G. cooling means for channelling air through passageways that include openings through the brake wheel, said openings being adjacent to the brake liner.
Claim 20
Dependent Claim
23 words
An electromagnetic brake assembly as set forth in claim 15 wherein: said cooling means is provided by rotation of the shaft during operation.
Claim 21
Dependent Claim
35 words
An electromagnetic brake assembly as set forth in claim 16 wherein: said cooling means comprises stator means adjacent the periphery of the brake wheel for forcing said air through said passageway adjacent the brake liner.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |