US3728905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt transmission having mechanism for reverse grinding
Assignee: Hay and Forage Industries
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Filing: 1972-01-07
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Granted: 1973-04-24
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Expires: 1992-01-07
Abstract
Abstract A power transmission for farm implements, such as forage harvesters, having a rotor provided with chopping blades, is operable to drive the rotor in reverse during sharpening of the blades. A pair of belt and pulley assemblies are normally driven alternately to effect either forward or reverse rotation of one or more output shafts. Upon the removal of shear or break pins, installation of a stud and substitution of one link for another, a direct drive of the rotor from a power shaft is released and the rotor is reversed by operation of both assemblies simultaneously.
Inventors
- 👤 W Long
- 👤 F Fell
- 👤 L Goering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:58
CPC Classifications
F; F16; F16H; F16H3/00; F16H2712/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
109 words
In a power transmission: a pair of input shafts; at least one output shaft; a shiftable control; a first drive unit coupled with one of the input shafts for rotating the latter when the control is shifted in one direction; a second drive unit coupled with the other of said input shafts for rotating the latter when the control is shifted in the opposite direction; and structure coupling the input shafts with the output shaft for rotating the latter in one direction when said one input shaft is rotated by the first unit and in the opposite direction when said other input shaft is rotated by the second unit.
Claim 2
Dependent Claim
109 words
In a power transmission: a pair of input shafts; at least one output shaft; a shiftable control; a first drive unit coupled with one of the input shafts for rotating the latter when the control is shifted in one direction; a second drive unit coupled with the other of said input shafts for rotating the latter when the control is shifted in the opposite direction; and structure coupling the input shafts with the output shaft for rotating the latter in one direction when said one input shaft is rotated by the first unit and in the opposite direction when said other input shaft is rotated by the second unit.
Claim 3
Dependent Claim
55 words
A transmission as claimed in claim 1 wherein said structure comprises a train of rotatable elements secured to said one input shaft, to said second input shaft and to said output shaft respectively, and a power transmitting member connecting the elements in an arrangement to rotate the elements on the input shafts in opposite directions.
Claim 4
Dependent Claim
18 words
A transmission as claimed in claim 1 wherein is provided a unidirectional power shaft common to said units.
Claim 5
Dependent Claim
72 words
A transmission as claimed in claim 3 wherein said power shaft is provided with a section for each of said units respectively and a releasable connection between the sections, said control having parts for driving the units simultaneously from the second unit to the first unit when the sections are released and the control is shifted in said one direction whereby to drive one of the sections oppositely to the other section.
Claim 6
Dependent Claim
38 words
A transmission as claimed in claim 3 wherein each unit includes a belt and pulley assembly between the power shaft and the corresponding input shaft, and wherein said control is provided with a tightener for each belt respectively.
Claim 7
Dependent Claim
72 words
A transmission as claimed in claim 5 wherein one of the tighteners holds the belt of one assembly taut while the other tightener releases the belt of the other assembly when the control is shifted in said one direction, and wherein said other tightener holds the belt of the other assembly taut while the one tightener releases the belt of the one assembly when the control is shifted in said opposite direction.
Claim 8
Dependent Claim
75 words
In a power transmission: a unidirectional power shaft having a pair of sections; a releasable connection between said sections; a drive unit coupled with each of said sections respectively; a control shiftable to and from a position for driving said units from said sections; and structure coupled with said units for driving one of said sections oppositely to the other of said sections when said connection is released and said control is in said position.
Claim 9
Dependent Claim
75 words
In a power transmission: a unidirectional power shaft having a pair of sections; a releasable connection between said sections; a drive unit coupled with each of said sections respectively; a control shiftable to and from a position for driving said units from said sections; and structure coupled with said units for driving one of said sections oppositely to the other of said sections when said connection is released and said control is in said position.
Claim 10
Dependent Claim
43 words
A transmission as claimed in claim 7, said structure being provided with an output shaft, said control having parts selectively operable to effect operation of said units alternately to drive the output shaft in either of two directions when the sections are interconnected.
Claim 11
Dependent Claim
27 words
A transmission as claimed in claim 7, each of said units being a belt and pulley assembly, said control including a belt tightener for each assembly respectively.
Claim 12
Dependent Claim
34 words
A transmission as claimed in claim 9, each assembly including a pulley secured to the corresponding section of said power shaft, said connection being shear pin means normally interconnecting said pulleys on said sections.
Claim 13
Dependent Claim
23 words
A transmission as claimed in claim 9, said control including a swingable lever and a link connecting each tightener respectively with said lever.
Claim 14
Dependent Claim
77 words
A transmission as claimed in claim 11, said structure being provided with an output shaft, one of said links normally connected with one of said tighteners being releasable, said control having a third link adapted for interconnecting the lever and said one tightener when said one link is released for effecting operation of said units alternately upon swinging of the lever Whereby to drive the output shaft in either of two directions when the sections are interconnected.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |