US3580094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion transmission drive
Assignee: Excelermatic Inc
•
Filing: 1969-08-27
•
Granted: 1971-05-25
•
Expires: 1989-08-27
Abstract
Abstract A traction drive with movable flange pulleys on parallel shafts which operates with a large amount of traction element sag, both on the tight and slack side, maintained by a dual roller tensioning means which, through servo means, compensates for load, wear, and ratio position by controlled flange movements.
Inventors
- 👤 Charles E Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:21
CPC Classifications
F; F16; F16H; F16H9/00; F16H9/02; F16H9/04; F16H9/12; F16H9/16; F16H7/00; F16H7/08; F16H7/10; F16H7/12; F16H7/1254; F16H2007/0863; F16H2007/0874
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
109 words
A power transmission drive comprising in combination a pair of shafts arranged in parallel relationship, a pulley on each of said shafts, an endless traction transmitting member connecting said pulleys, and means for applying tension to both tight and slack sides of said member, said tension applying means comprising a pair of rollers engaging the opposite outer sides of said member between said pulleys, said rollers being mounted in floating relationship to said member whereby said rollers are freely movable in a direction normal to said member, the distance between said rollers being fixed whereby the two sides of said member remain the same distance apart under all conditions.
Claim 2
Dependent Claim
109 words
A power transmission drive comprising in combination a pair of shafts arranged in parallel relationship, a pulley on each of said shafts, an endless traction transmitting member connecting said pulleys, and means for applying tension to both tight and slack sides of said member, said tension applying means comprising a pair of rollers engaging the opposite outer sides of said member between said pulleys, said rollers being mounted in floating relationship to said member whereby said rollers are freely movable in a direction normal to said member, the distance between said rollers being fixed whereby the two sides of said member remain the same distance apart under all conditions.
Claim 3
Dependent Claim
115 words
The drive of claim 1 wherein there is provided tow pairs of arms, each roller is journaled between one pair of said arms, a pair of blocks, said arms are pivotally carried on a shaft which is carried between said blocks, a pair of guide members, said blocks being freely movable on said guide members, said guide members being normal to said traction transmitting member, whereby said rollers, arms, shaft, blocks and guide members provide a roller tension assembly for said traction member which is unrestrained in movement on said guide members and wherein the opposite sides of said traction member are maintained the same distance apart under all conditions of operation of the drive.
Claim 4
Dependent Claim
48 words
The drive of claim 2 wherein said moving means comprises a source of fluid under pressure and means responsive to said movement of said tension applying means for utilizing said fluid to effect said movement of the movable flanges according to the movement of said tension applying means.
Claim 5
Dependent Claim
26 words
The drive of claim 3 wherein said effected movement of the movable flanges is in accordance with the direction of movement of the tension applying means.
Claim 6
Dependent Claim
39 words
The drive of claim 2 wherein each pulley comprises flanges arranged for relative movement therebetween and means is provided for moving at least one flange of each of said pulleys in response to movement of said tension applying means.
Claim 7
Dependent Claim
15 words
The drive of claim 5 wherein said one flanges are moved simultaneously in opposite directions.
Claim 8
Dependent Claim
15 words
The drive of claim 5 wherein said one flanges are moved simultaneously in opposite directions.
Claim 9
Dependent Claim
41 words
The drive of claim 1 wherein each pulley comprises flanges arranged for relative movement therebetween and means is provided for moving at least one flange of each of said pulleys in response to a predetermined movement of said tension applying means.
Claim 10
Dependent Claim
10 words
The drive of claim 8 wherein said movement is reversible.
Claim 11
Dependent Claim
25 words
The drive of claim 8 wherein additional means is provided for moving said one flanges to effect a change of speed ration between said shafts.
Claim 12
Dependent Claim
25 words
The drive of claim 10 wherein additional means is provided for moving said one flanges to effect a change of speed ratio between said shafts.
Claim 13
Dependent Claim
29 words
The drive of claim 10 provided with means for moving the movable flange or flanges of one pulley more than the movable flange or flanges of the other pulley.
Claim 14
Dependent Claim
15 words
The drive of claim 8 wherein said one flanges are moved simultaneously in opposite directions.
Claim 15
Dependent Claim
29 words
The drive of claim 8 provided with means for moving the movable flange or flanges of one pulley more than the movable flange or flanges of the other pulley.
Claim 16
Dependent Claim
74 words
The drive of claim 1 wherein each pulley comprises flanges arranged for relative movement therebetween and wherein therE is provided means for preloading said traction member by urging said flanges into engagement with said traction member, and means responsive to a predetermined movement of said tension applying means for moving at least one flange of each pulley in a direction to move said traction member to a different position with respect to said pulleys.
Claim 17
Dependent Claim
40 words
The drive of claim 1 wherein each pulley comprises flanges arranged for relative movement therebetween and means is provided for moving at least one flange of each of said pulleys to effect a change of speed ration between said shafts.
References Cited (Backward Citations)
US3483688A
Cited
US3496918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |