US3679027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking method and apparatus
Assignee: Case LLC
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Filing: 1970-07-23
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Granted: 1972-07-25
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Expires: 1990-07-23
Abstract
Abstract A method and apparatus for exerting a maximum braking force on a rotating member with a minimum amount of force being applied to the braking member. The apparatus includes a disc having opposed surfaces on the periphery thereof which define planes intersecting at an acute angle substantially less than 45*. A brake member is pivoted at one end on a support adjacent the disc and has a radius of curvature which is greater than the radius of the disc with actuating means cooperating with he opposite end of the elongated member to force cooperating surfaces on the member into engagement with the surfaces on the disc. During such movement, the elongated member is distorted to substantially the curvature of the periphery of the disc so that the member will return to its undistorted condition upon release of the actuating means and prevent interlocking of the member and the disc.
Inventors
- 👤 Birger F Jansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:32
CPC Classifications
F; F16; F16D; F16D49/00; F16D65/00; F16D65/02; F16D2065/024
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
In a brake assembly of the type having a rigid shoe moved toward and away from a rotating member, the improvement of said rotating member having opposed inclined external surfaces defining planes intersecting at an acute angle of less than 45* beyond the periphery of said member; a support adjacent said rotating member; pivot means on said support with one end of said shoe pivoted on said pivot means, said shoe having a groove with internal surfaces inclined to define an angle equal to said acute angle; and actuating means cooperating with the opposite end of said shoe for pivoting said shoe on said support to move said internal surfaces into engagement with said external surfaces.
Claim 2
Dependent Claim
116 words
In a brake assembly of the type having a rigid shoe moved toward and away from a rotating member, the improvement of said rotating member having opposed inclined external surfaces defining planes intersecting at an acute angle of less than 45* beyond the periphery of said member; a support adjacent said rotating member; pivot means on said support with one end of said shoe pivoted on said pivot means, said shoe having a groove with internal surfaces inclined to define an angle equal to said acute angle; and actuating means cooperating with the opposite end of said shoe for pivoting said shoe on said support to move said internal surfaces into engagement with said external surfaces.
Claim 3
Dependent Claim
63 words
A brake shoe as defined in claim 1, in which said actuating means comprises an actuating member pivoted about an axis spaced from said pivot means; said actuating member having an element eccentric to said axis and said shoe having an elongated slot receiving said element whereby rotation of said actuating member will move said shoe toward and away from said rotating member.
Claim 4
Dependent Claim
42 words
A brake assembly as defined in claim 1, in which said brake shoe comprises an elongated member having a curvature generally following the curvature of the rotating member but having a larger radius of curvature than the curvature of said rotating member.
Claim 5
Dependent Claim
71 words
A brake as defined in claim 3, in which said pivot means is located to cause initial engagement of said internal surfaces with said external surfaces adjacent said one end of said shoe whereby said elongated member will be deformed to substantially the curvature of said rotating member by said actuating means and whereby the release of said actuating means will cause said elongated member to return to its undeformed condition.
Claim 6
Dependent Claim
39 words
A brake as defined in claim 1, in which said pivot means and said actuating means cooperate to deform said shoe during actuation and in which said shoe returns to an undeformed condition upon release of said actuating means.
Claim 7
Dependent Claim
26 words
A brake as defined in claim 5, including the further improvement of means for repositioning said pivot means to compensate for wear of said internal surfaces.
Claim 8
Dependent Claim
146 words
A brake unit for controlling a circular disc rotatable about an axis, said disc having opposed inclined surfaces adjacent the outer periphery thereof, comprising an elongated brake shoe having a slot on one elongated edge thereof defining braking surfaces adapted to cooperate with said inclined surfaces, the longitudinal dimension of said slot having a curvature generally following the curvature of the periphery of said disc and having a radius larger than the radius of said disc; a fixed support adjacent the periphery of said disc; means on said support pivotally supporting one end of said brake shoe and locating said slot adjacent to the periphery of said disc; and actuating means cooperating with the opposite end of said brake shoe for moving said cooperating surfaces into and out of engagement with said inclined surfaces to distort the longitudinal dimension to substantially the radius of said disc.
Claim 9
Dependent Claim
146 words
A brake unit for controlling a circular disc rotatable about an axis, said disc having opposed inclined surfaces adjacent the outer periphery thereof, comprising an elongated brake shoe having a slot on one elongated edge thereof defining braking surfaces adapted to cooperate with said inclined surfaces, the longitudinal dimension of said slot having a curvature generally following the curvature of the periphery of said disc and having a radius larger than the radius of said disc; a fixed support adjacent the periphery of said disc; means on said support pivotally supporting one end of said brake shoe and locating said slot adjacent to the periphery of said disc; and actuating means cooperating with the opposite end of said brake shoe for moving said cooperating surfaces into and out of engagement with said inclined surfaces to distort the longitudinal dimension to substantially the radius of said disc.
Claim 10
Dependent Claim
103 words
A brake unit as defined in claim 7, in which said actuating means includes a crank rotatable about an axis parallel to the axis of said disc and an element on said crank, said element having an axis eccentric to said crank axis, said element axis being located between said crank axis and said disc axis when said cooperating surfaces are in engagement with said inclined surfaces to distort said brake shoe to the configuration of said disc with said brake shoe returning to its undistorted condition upon release of said actuating means to prevent locking of said brake shoe to said disc.
Claim 11
Independent Claim
103 words
A method of stopping a rotating circular disc which comprises pivotally supporting one end of a curved braking member about an axis parallel to the disc axis, the curvature of said member having a radius greater than the radius of said disc; moving the opposite end of said member to interengage said member and said disc and distort said member within its elastic limit to approximately the curvature of said disc; and releasing said braking member when said disc is stopped to allow said member to return to its undeformed condition whereby to prevent said braking member from being locked to said disc.
Claim 12
Independent Claim
103 words
A method of stopping a rotating circular disc which comprises pivotally supporting one end of a curved braking member about an axis parallel to the disc axis, the curvature of said member having a radius greater than the radius of said disc; moving the opposite end of said member to interengage said member and said disc and distort said member within its elastic limit to approximately the curvature of said disc; and releasing said braking member when said disc is stopped to allow said member to return to its undeformed condition whereby to prevent said braking member from being locked to said disc.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |