US3812731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
V-belt type automatic speed change gear
Assignee: Kawasaki Heavy Industries Ltd
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Filing: 1973-01-16
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Granted: 1974-05-28
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Expires: 1993-01-16
Abstract
Abstract An automatic speed change V-Belt drive pulley having a fixed conical flange and a movable cooperating conical flange for engaging the edges of a V-Belt with a drive disc fixed to the same shaft carrying the fixed conical flange and cooperating cam means and centrifugally outwardly movable weights operating cam followers which engage the cam surface on one of the movable flange and the fixed disc so that when the centrifugal weight moves outwardly due to increased speed the movable flange moves toward the fixed flange thereby causing the V-belt to move outwardly along the surfaces of the belt engaging conical surfaces of the fixed and movable flanges, the centrifugal weights being mounted on pivoted arms pivoted about axes parallel with the shaft on which the speed change device is mounted.
Inventors
- 👤 T Sugimoto
- 👤 I Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:17
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/662; F16H61/66231; F16H61/66245; F16H55/00; F16H55/32; F16H55/52; F16H55/56; F16H55/563
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
231 words
An automatic speed change of the V-belt drive type comprising a shaft, a fixed conical flange having a belt engaging surface for engagement with one edge of a V-belt, a movable conical flange slidably mounted on said shaft and having a belt engaging surface, the conical V-belt engaging surfaces diverging radially outwardly for engaging the opposite edge of the V-belt, a drive disk fixed on said shaft to rotate therewith, means providing for driving connection between said fixed and movable flanges and said drive disk during axial movement of said movable belt engaging flange, cam means on one of said movable flange and said drive disk, centrifugal weight supporting arm means pivoted on axes substantially parallel to said shaft for movement outwardly from said shaft on the other of said drive disk and movable flange, friction reducing roller cam follower means on said movable weight supporting means and cooperating with said cam means on said one of said movable flange and drive disk whereby the roller cam follower rolls on said cam substantially avoiding sliding and frictional forces when the rapid rotation of said shaft causes centrifugal force to move said centrifual weight supporting arm means outwardly urging said movable belt engaging flange into close relation to said fixed belt engaging flange whereby the effective diameter of said belt engaging flanges smoothly moves the V-belt outwardly on said speed control pulley.
Claim 2
Dependent Claim
231 words
An automatic speed change of the V-belt drive type comprising a shaft, a fixed conical flange having a belt engaging surface for engagement with one edge of a V-belt, a movable conical flange slidably mounted on said shaft and having a belt engaging surface, the conical V-belt engaging surfaces diverging radially outwardly for engaging the opposite edge of the V-belt, a drive disk fixed on said shaft to rotate therewith, means providing for driving connection between said fixed and movable flanges and said drive disk during axial movement of said movable belt engaging flange, cam means on one of said movable flange and said drive disk, centrifugal weight supporting arm means pivoted on axes substantially parallel to said shaft for movement outwardly from said shaft on the other of said drive disk and movable flange, friction reducing roller cam follower means on said movable weight supporting means and cooperating with said cam means on said one of said movable flange and drive disk whereby the roller cam follower rolls on said cam substantially avoiding sliding and frictional forces when the rapid rotation of said shaft causes centrifugal force to move said centrifual weight supporting arm means outwardly urging said movable belt engaging flange into close relation to said fixed belt engaging flange whereby the effective diameter of said belt engaging flanges smoothly moves the V-belt outwardly on said speed control pulley.
Claim 3
Dependent Claim
44 words
The invention according to claim 1 in which a track is mounted on the other of said movable flange and drive disk, and a second roller follower is mounted on said pivoted arm adjacent said first roller follower in rolling relation to said track.
Claim 4
Dependent Claim
16 words
The invention according to claim 1 in which the cam is mounted on the movable flange.
Claim 5
Dependent Claim
16 words
The invention according to claim 3 in which the cam is a section of a cylinder.
Claim 6
Dependent Claim
23 words
The invention according to claim 1 in which stop means are provided to limit the inward and outward movement of the pivoted arm.
Claim 7
Dependent Claim
53 words
The invention according to claim 1 in which the hubs of the fixed flange and the movable flange are each provided with recesses on their adjacent surfaces and a compression spring is positioned surrounding the shaft and adapted to be compressed within the recesses when the flanges are in high speed operating position.
Claim 8
Dependent Claim
52 words
The invention according to claim 1 in which stop means are provided to prevent excessive movement of the pivoted arms and the flanges are provided with hub portions having spring receiving recesses and a compression spring is supported in such recesses to move said flanges away from one another in idling position.
Claim 9
Dependent Claim
47 words
The invention according to claim 7 in which the shaft is provided with a tapered bore for attachment to the tapered end of a drive shaft and means are provided for retaining the shaft of the automatic speed changes drive on the drive shaft in driving relation.
Claim 10
Dependent Claim
57 words
The invention according to claim 1 in which the fixed and movable flanges are provided with recesses in their hub portions facing one another and a compression spring is mounted therein, the cam having a continuous slope so that the spring normally urges the pivoted arms inwardly and stop means are provided to limit the outward movement.
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |