US3722277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission having direction control
Assignee: Hay and Forage Industries
•
Filing: 1971-05-11
•
Granted: 1973-03-27
•
Expires: 1991-05-11
Abstract
Abstract A power transmission is provided with a pair of belts interconnecting a drive and a driven sheave in an arrangement which permits selective rotation of the driven sheave in either direction by movement of corresponding idler pulleys alternately from a neutral position to their belt tightening positions. A lost motion assembly forming a part of an extensible toggle link connection with one of the belt tightening units makes it possible to use but a single actuator to control the entire operation.
Inventors
- 👤 L Goering
- 👤 F Fell
- 👤 W Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:08
CPC Classifications
F; F16; F16H; F16H9/00; F16H9/02; F16H9/04; F16H2712/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
199 words
In a power transmission, a rotatable drive member; a rotatable driven member; a first idler means mounted for movement through a displacement relative to said members; a first continuous, flexible element trained on said members and said first idler means, and arranged, when tensioned by said first idler means, to rotate the driven member in one direction; a second idler means remote from said first idler means and mounted for movement through its own displacement relative to said members and independently of said first idler means; a second continuous, flexible element trained on said members and said second idler means, and arranged, when tensioned by said second idler means, to rotate the driven member in the opposite direction; a movable actuator common to said first and second idler means; mechanism operably coupling the actuator with said first idler means for shifting the latter to a position tensioning said first element when the actuator is moved toward one end of its path of travel; and structure operably coupling the actuator with said second idler means for shifting the latter to a position tensioning said second element when the actuator is moved toward the opposite end of its path of travel.
Claim 2
Dependent Claim
199 words
In a power transmission, a rotatable drive member; a rotatable driven member; a first idler means mounted for movement through a displacement relative to said members; a first continuous, flexible element trained on said members and said first idler means, and arranged, when tensioned by said first idler means, to rotate the driven member in one direction; a second idler means remote from said first idler means and mounted for movement through its own displacement relative to said members and independently of said first idler means; a second continuous, flexible element trained on said members and said second idler means, and arranged, when tensioned by said second idler means, to rotate the driven member in the opposite direction; a movable actuator common to said first and second idler means; mechanism operably coupling the actuator with said first idler means for shifting the latter to a position tensioning said first element when the actuator is moved toward one end of its path of travel; and structure operably coupling the actuator with said second idler means for shifting the latter to a position tensioning said second element when the actuator is moved toward the opposite end of its path of travel.
Claim 3
Dependent Claim
47 words
In a power transmission as claimed in claim 1 wherein is provided a releasable lock for alternately holding said first idler means in said position tensioning the first element or holding both said first and second idler means in a neutral position with their corresponding elements untensioned.
Claim 4
Dependent Claim
31 words
In a power transmission as claimed in claim 1 wherein said structure is provided with a releasable lock for holding said second idler means in said position tensioning the second element.
Claim 5
Dependent Claim
111 words
In a power transmission as claimed in claim 1 wherein said structure includes a pair of articulated links presenting a toggle joint supporting said second idler means, a reciprocable device connected with said actuator and slidably coupled with one of said links, a pair of spaced abutments on said one link, and a pressure transmitting component on said device alternately engageable with said abutments for controlling the toggle joint as the device is reciprocated, one of said abutments being disposed for movement out of the path of travel of said component after flection of the links, permitting the actuator to shift said first idler means without shifting said second idler means.
Claim 6
Dependent Claim
28 words
In a power transmission as claimed in claim 1 wherein is provided a releasable lock for holding said first idler means in said position tensioning the first element.
Claim 7
Dependent Claim
31 words
In a power transmission as claimed in claim 5 wherein is provided a control operably connected with said actuator for moving the same, said control having means for releasing said lock.
Claim 8
Dependent Claim
50 words
In a power transmission as claimed in claim 1 wherein said structure includes extensible linkage supporting said second idler means, and a device connected with said actuator and engageable with said linkage when the actuator is moved toward said opposite end of its path of travel for extending said linkage.
Claim 9
Dependent Claim
38 words
In a power transmission as claimed in claim 7 wherein is provided a lost motion assembly between said device and said linkage for permitting the actuator to shift said first idler means without shifting said second idler means.
Claim 10
Dependent Claim
57 words
In a power transmission as claimed in claim 1 wherein said structure includes a toggle joint supporting said second idler means and provided with articulated links presenting a knee, and a device interconnecting said actuator and said toggle joint for controlling the latter to shift the second idler means by the flection and extension of said links.
Claim 11
Dependent Claim
47 words
In a power transmission as claimed in claim 9 wherein said knee is movable past center by said device and a stop is provided to limit said past center movement, preseNting a releasable lock for holding said second idler means in said position tensioning the second element.
Claim 12
Dependent Claim
67 words
In a power transmission as claimed in claim 9 wherein said device is slidably connected to one of said links and wherein interengageable parts are provided on the device and on said one link for controlling the toggle joint, presenting a lost motion assembly between the device and said one link for permitting the actuator to shift said first idler means without shifting said second idler means.
Claim 13
Dependent Claim
36 words
In a power transmission as claimed in claim 1, wherein said first idler means includes a single rotatable idler wheel and said second idler means includes a pair of side-by-side, axially aligned, independently rotatable idler wheels.
Claim 14
Dependent Claim
81 words
In a power transmission as claimed in claim 12, wherein said second element has a working side, a slack side, and a single twist therein presenting a pair of loops, said loops being trained around said drive and driven members respectively and said working side of the second element being looped on one of the idler wheels of said second idler means with the slack side of said second element looped on the other idler wheel of said second idler means.
Claim 15
Dependent Claim
142 words
In a power transmission, a rotatable drive member; a rotatable driven member; a single continuous, flexible element having a working side and a slack side, said element having a single twist therein forming a first loop which is trained around the drive member and a second loop which is trained around the driven member, a pair of side-by-side idlers rotatable independently of one another about aligned axes, the working side of said element being looped on one of said idlers and the slack side of said element being simultaneously looped on the other of said idlers to drive said driven member oppositely to said drive member when the element is tensioned by the idlers; structure including extensible means supporting said idlers for movement to and from a position tensioning said element; and means coupled with said extensible means for actuating the latter.
Claim 16
Dependent Claim
142 words
In a power transmission, a rotatable drive member; a rotatable driven member; a single continuous, flexible element having a working side and a slack side, said element having a single twist therein forming a first loop which is trained around the drive member and a second loop which is trained around the driven member, a pair of side-by-side idlers rotatable independently of one another about aligned axes, the working side of said element being looped on one of said idlers and the slack side of said element being simultaneously looped on the other of said idlers to drive said driven member oppositely to said drive member when the element is tensioned by the idlers; structure including extensible means supporting said idlers for movement to and from a position tensioning said element; and means coupled with said extensible means for actuating the latter.
Claim 17
Dependent Claim
29 words
In a power transmission as claimed in claim 14 wherein said extensible means is provided with a releasable lock for holding the same in a position tensioning said element.
Claim 18
Dependent Claim
50 words
In a power transmission as claimed in claim 14 wherein said structure includes an arm coupled with said idlers and mounted for swinging movement of the idlers toward and away from the drive and driven members, said extensible means being operably coupled with said arm for controlling the swinging thereof.
Claim 19
Dependent Claim
33 words
In a power transmission as claimed in claim 16 wherein said extensible means comprises an elbow joint having a pair of articulated links, one of the links being pivotally connected to said arm.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |