US3734256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque transmitting device
Assignee: COMPTROL Inc
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Filing: 1971-12-06
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Granted: 1973-05-22
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Expires: 1991-12-06
Abstract
Abstract A magnetic friction device for transmitting torque from one to the other of spaced apart, relatively rotatable, axially aligned members. One of the members carries a circular band of friction material concentric with the axis of rotation of the member. Cooperating therewith, carried by the other member, are a plurality of axially movable segments or planets, each having a flat face adapted to engage the face of the circular band of friction material. Additionally, the planets may be rotatably journaled in said other member and so disposed relative to the band of friction material that engagement therewith and relative rotation of the members causes each planet to rotate about its axis. Each planet is axially moved into engagement with the band of friction material by a controlable magnetic force applied to all of the planets to thereby transmit torque from one member to the other.
Inventors
- 👤 W Compton
- 👤 J Desch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:30
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
95 words
A torque transmitting device comprising two spaced apart, axially aligned, relatively movable members, a circular band of frictional material carried by one of said members concentric with the axis of rotation, an axially movable planet comprising a disc having a flat face adapted to engage said band journaled in said other member having an axis of rotation radially displaced from the mean diameter of said band to cause said planet to rotate upon frictional engagement with said band, and means for axially moving said planet to bring said flat face into engagement with said band.
Claim 2
Dependent Claim
95 words
A torque transmitting device comprising two spaced apart, axially aligned, relatively movable members, a circular band of frictional material carried by one of said members concentric with the axis of rotation, an axially movable planet comprising a disc having a flat face adapted to engage said band journaled in said other member having an axis of rotation radially displaced from the mean diameter of said band to cause said planet to rotate upon frictional engagement with said band, and means for axially moving said planet to bring said flat face into engagement with said band.
Claim 3
Dependent Claim
33 words
A torque transmitting device as set forth in claim 1 including a plurality of axial movable planets journaled in said other member and each having a flat face adapted to engage said band.
Claim 4
Dependent Claim
54 words
A torque transmitting device as set forth in claim 2 wherein the radius of the flat face of each of said planets is at least equal to one half of the width of said band plus the radial displacement of the axis of rotation of the planet from the mean diameter of said band.
Claim 5
Dependent Claim
53 words
A torque transmitting device as set forth in claim 2 wherein the axes of rotation of some of the planets are radially displaced from the mean diaMeter of said band in one direction and the remainder of the planets are radially displaced from the mean diameter of said band in the opposite direction.
Claim 6
Dependent Claim
26 words
A torque transmitting device as set forth in claim 1 wherein the means for axially moving said planet into engagement with said band comprises a magnet.
Claim 7
Dependent Claim
16 words
A torque transmitting device as set forth in claim 5 wherein said magnet is an electromagnet.
Claim 8
Dependent Claim
20 words
A torque transmitting device as set forth in claim 6 further including means for adjusting the current in said electromagnet.
Claim 9
Dependent Claim
60 words
A torque transmitting device as set forth in claim 7 wherein said electromagnet is U-shaped and concentrically mounted on said one member with the axis of rotation thereof and said circular band of friction material is mounted within said magnet and the face of said band engaging said planet is substantially flush with the end edges of said U-shaped magnet.
Claim 10
Dependent Claim
19 words
A torque transmitting device as set forth in claim 8 wherein said planet comprises the armature for said electromagnet.
Claim 11
Dependent Claim
24 words
A torque transmitting device as set forth in claim 9 wherein said band has a width less than the width of said U-shaped magnet.
Claim 12
Dependent Claim
26 words
A torque transmitting device as set forth in claim 8 wherein the field of said U-shaped magnet comprises an annular coil mounted within said U-shaped magnet.
Claim 13
Dependent Claim
100 words
A torque transmitting device comprising two spaced apart, axially aligned, relatively rotatable members, a circular band of frictional material carried by one of said members concentric with the axis of rotation of said members, and axially movable planet comprising a plurality of hollow concentric cylindrical sleeves each having a flat annular end face adapted to frictionally engage said band and each free to move axially and independently rotate, the outer one of said sleeves journaled in said other member, and means for axially moving said planet to bring the flat end faces of said sleeves into engagement with said bands.
Claim 14
Dependent Claim
100 words
A torque transmitting device comprising two spaced apart, axially aligned, relatively rotatable members, a circular band of frictional material carried by one of said members concentric with the axis of rotation of said members, and axially movable planet comprising a plurality of hollow concentric cylindrical sleeves each having a flat annular end face adapted to frictionally engage said band and each free to move axially and independently rotate, the outer one of said sleeves journaled in said other member, and means for axially moving said planet to bring the flat end faces of said sleeves into engagement with said bands.
Claim 15
Dependent Claim
83 words
A torque transmitting device comprising two spaced apart, axially aligned, relatively rotatable members, a circular band of frictional material composed of a plurality of circular sections, one of said sections having a coefficient of friction greater than the coefficient of friction of another of said sections, an axially movable planet journaled in the other of said members having a flat face adapted to engage said band, and means for axially moving said planet to bring said flat face into engagement with said band.
Claim 16
Dependent Claim
83 words
A torque transmitting device comprising two spaced apart, axially aligned, relatively rotatable members, a circular band of frictional material composed of a plurality of circular sections, one of said sections having a coefficient of friction greater than the coefficient of friction of another of said sections, an axially movable planet journaled in the other of said members having a flat face adapted to engage said band, and means for axially moving said planet to bring said flat face into engagement with said band.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |