Patent US3844387A successfully refreshed from Google Patents.
US3844387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking device for a driven shaft
Assignee: YAMAAI SEISAKUSHO CO Ltd
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Filing: 1973-03-19
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Granted: 1974-10-29
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Expires: 1993-03-19
Abstract
Abstract A braking device for a driven shaft includes a rotatable disc fixed to a driven shaft, a brake disc journaled concentrically with and adjacent said rotatable disc so as to be movable both in the axial direction and around the axis, and a brake block fixed in position adjacent said rotatable disc and around the outer periphery of said brake disc. The brake disc is constantly urged by a spring into engagement with the rotatable disc, and also with the brake block so that the free rotation of the brake disc around the axis is restrained, thereby imparting a braking force to the driven shaft. The device is provided with means including balls installed between the rotatable disc and the brake disc for the intermittent disengagement between the brake disc and the brake block against the force of the spring.
Inventors
- 👤 H Morokoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:41
CPC Classifications
F; F16; F16D; F16D59/00; F16D59/02; F16D65/00; F16D65/02; F16D2065/024; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/34; F16D2125/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
259 words
A braking device for a driven shaft comprising: a rotatable disc fixed to said driven shaft to rotate therewith; a brake disc journalled concentrically with and adjacent said rotatable disc so as to be movable both in the axial direction and about its axis, said brake disc having a cone-shaped outer surface tapering toward said rotatable disc; a brake block fixed in position adjacent said rotatable disc and around the outer periphery of said brake disc concentrically with said brake disc, said brake block having a cone-shaped inner surface tapering toward said rotatable disc, said inner surface of said brake block being engageable with said cone-shaped outer surface of said brake disc to restrain the free rotation of said brake disc about the axis when said brake disc engages with said rotatable disc; spring means mounted adjacent said brake disc for urging said brake disc into engagement with said rotatable disc and also with said brake block; and means located between said rotatable disc and brake disc for intermittent disengagement between said brake disc and said brake block against the force of said spring means, said means comprising a plurality of balls, and a plurality of spaces formed between opposed surfaces of said rotatable disc and said brake disc at regular intervals in the circumferential direction of said two discs for receiving said balls under the condition which said balls always engage with both discs, each of said ball receiving spaces having the depth gradually decreasing in a direction opposite to the direction of rotation of said rotatable disc.
Claim 2
Dependent Claim
259 words
A braking device for a driven shaft comprising: a rotatable disc fixed to said driven shaft to rotate therewith; a brake disc journalled concentrically with and adjacent said rotatable disc so as to be movable both in the axial direction and about its axis, said brake disc having a cone-shaped outer surface tapering toward said rotatable disc; a brake block fixed in position adjacent said rotatable disc and around the outer periphery of said brake disc concentrically with said brake disc, said brake block having a cone-shaped inner surface tapering toward said rotatable disc, said inner surface of said brake block being engageable with said cone-shaped outer surface of said brake disc to restrain the free rotation of said brake disc about the axis when said brake disc engages with said rotatable disc; spring means mounted adjacent said brake disc for urging said brake disc into engagement with said rotatable disc and also with said brake block; and means located between said rotatable disc and brake disc for intermittent disengagement between said brake disc and said brake block against the force of said spring means, said means comprising a plurality of balls, and a plurality of spaces formed between opposed surfaces of said rotatable disc and said brake disc at regular intervals in the circumferential direction of said two discs for receiving said balls under the condition which said balls always engage with both discs, each of said ball receiving spaces having the depth gradually decreasing in a direction opposite to the direction of rotation of said rotatable disc.
Claim 3
Dependent Claim
89 words
A braking device as set forth in claim 1, wherein each of said ball receiving spaces comprises a recess formed in the circumferential edge of said rotatable disc on the side opposed to said brake disc, the depth of said recess being gradually decreased in a direction opposite to the direction of rotation of said rotatable disc, and an inclined surface formed at radial position of said brake disc corresponding to said recess of said rotatable disc, said inclined surface tapering in the direction remote from said rotatable disc.
Claim 4
Dependent Claim
59 words
A braking device as set forth in claim 1, wherein each of said ball receiving spaces comprises a pair of recesses formed at radially opposed positions in the opposed surfaces of said rotatable disc and said brake disc, the depth of said recesses being gradually decreased in a direction opposite to the direction of rotation of said rotatable 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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |