Patent US4056987A successfully refreshed from Google Patents.
US4056987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for parallel connection of infinitely-adjustable looping gearings
Assignee: Individual
•
Filing: 1975-11-17
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Granted: 1977-11-08
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Expires: 1995-11-17
Abstract
Abstract A mechanism for the parallel connection of infinitely-adjustable looping gearings having planetary and/or differential gearings interconnected with the displaceable pulley halves and control threads that automatically adjust running differences between the different V-belt pulleys as well as providing a means for simultaneously changing the transmission ratio of several coaxially-mounted V-belt pulleys.
Inventors
- 👤 Georges Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:33
CPC Classifications
F; F16; F16H; F16H9/00; F16H9/02; F16H9/04; F16H9/12; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H37/0846; F16H9/16; F16H2009/163
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
142 words
A power transmission mechanism for the parallel connection of infinitely-adjustable pulleys with at least two belt pulleys mounted axially side by side on a common shaft comprising: at least two belt pulleys, each having at least one axially displaceable half which determines the effective pulley diameter; an equalizing mechanism comprising differential gearing means for automatically displacing said at least one displaceable half of a pulley to nullify any asynchronism occurring in the running of said pulley relative to the other of said at least two pulleys; said at least two belt pulleys being inter-connected via said gearing means coaxially in series with said shaft and being rotatable in relation to said shaft, and pairs of oppositely pitched screw threads operably connecting said displaceable pulley halves and said shaft for displacing said pulley halves whenever said pulleys commence to turn at different speeds.
Claim 2
Dependent Claim
142 words
A power transmission mechanism for the parallel connection of infinitely-adjustable pulleys with at least two belt pulleys mounted axially side by side on a common shaft comprising: at least two belt pulleys, each having at least one axially displaceable half which determines the effective pulley diameter; an equalizing mechanism comprising differential gearing means for automatically displacing said at least one displaceable half of a pulley to nullify any asynchronism occurring in the running of said pulley relative to the other of said at least two pulleys; said at least two belt pulleys being inter-connected via said gearing means coaxially in series with said shaft and being rotatable in relation to said shaft, and pairs of oppositely pitched screw threads operably connecting said displaceable pulley halves and said shaft for displacing said pulley halves whenever said pulleys commence to turn at different speeds.
Claim 3
Dependent Claim
75 words
The mechanism of claim 1, wherein said equalizing mechanism comprises differential and planetary gearings and said at least two belt pulleys are interconnected via said gearings coaxially in series with said shaft and are rotatable in relation to said shaft, whenever the number of said at least two pulleys is even, said pulleys are arranged in pairs, whenever the number of said pulleys is odd, said pulleys are arranged in pairs with an adjoining single.
Claim 4
Dependent Claim
14 words
The mechanism of claim 1, wherein said pulley halves are supported by their periphery.
Claim 5
Dependent Claim
19 words
The mechanism of claim 3, wherein whenever two adjacent pulleys are paired, said adjacent pulleys are mutually axially supported.
Claim 6
Dependent Claim
39 words
The mechanism of claim 2, further including a control mechanism comprising a control sleeve having one of said pairs of screw threads and being non-rotatably mounted on said shaft relative to said shaft and axially displaceable along said shaft.
Claim 7
Dependent Claim
37 words
The mechanism of claim 2, further including a control mechanism comprising a control sleeve having one of said pairs of screws threads and being rotatably mounted on said shaft relative to said shaft and being axially non-displaceable.
Claim 8
Dependent Claim
58 words
The mechanism of claim 1, further comprising an other shaft; at least two further pulleys on said other shaft; and at least two belts connecting said belt pulleys and said further pulleys, wherein each of said further pulleys having at least one axially displaceable half and a spring loading of said axially displaceable half of said further pulley.
Claim 9
Dependent Claim
16 words
The mechanism of claim 7, wherein two adjacent further pulleys are loaded by the same spring.
Claim 10
Dependent Claim
24 words
The mechanism of claim 1 wherein said equalizing mechanism is made of plastic and all sliding surfaces of said mechanism are coated with plastic.
Claim 11
Dependent Claim
16 words
The mechanism of claim 1 wherein the contact surfaces of said pulleys are coated with plastic.
Claim 12
Dependent Claim
20 words
The mechanism of claim 7, wherein the contact surfaces of said pulleys and said further pulleys are coated with plastic.
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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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |