Patent US3680622A successfully refreshed from Google Patents.
US3680622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power-transmitting mechanism for side-coiling door
Assignee: NORTH AMERICAN W-D DOOR Inc A CORP OF OH
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Filing: 1971-04-14
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Granted: 1972-08-01
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Expires: 1991-04-14
Abstract
Abstract A side-coiling door powered through opening and closing movements by a reversible motor which operates through an improved power-transmission mechanism. The outer turns or helical wraps of the door are of a greater circumferential length, due to their larger diameter, than the inner wraps of the door. Accordingly, each revolution of the means causing either said door opening or closing movement cannot be correlated to a standard length of door being at that time either wound or unwound upon said means. The improved power-transmission mechanism hereof allows for this disparity, even though it has but a single power shaft for both a door-opening and a doorclosing sprocket mounted on said power shaft. This is achieved by having only one said sprocket, during any interval of operation of the mechanism, drivingly connected to the power shaft while the other sprocket is freewheeling thereon. The freewheeling condition, of course, does not interfere with the driving requirements of the power shaft.
Inventors
- 👤 Russell H Lester Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:34
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/643; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/146
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
225 words
The combination with a side-coiling door of an improved power-transmitting mechanism for urging said door through opening and closing movements, said mechanism comprising a power shaft adapted to be selectively powered in opposite directions of rotation respectively corresponding to said door opening and closing movements, a pair of spaced apart door-opening and doorclosing sprockets disposed in freewheeling relation on said power shaft and each operatively connected to said door to respectively produce said opening and closing movements thereof, a driving rachet on each said door-opening and door-closing sprockets disposed in facing relation to each other, an actuating member fixedly connected to said power shaft in an interposed position between said facing driving rachets, and a pivotally mounted rachet-driving member having first and second operative ends operatively arranged to be pivoted by said actuating member in one direction so that said first end thereof is moved into driving relation with one said driving rachet and said second end is moved into a clearance position with respect to said other driving rachet, and when pivoted in a reverse direction said first end is disengaged from driving relation and said second end is moved from said clearance position into driving relation, whereby during an interval of operation only one said dooropening or door-closing sprocket is powered in rotation with said power shaft while the other is freewheeling thereon.
Claim 2
Dependent Claim
225 words
The combination with a side-coiling door of an improved power-transmitting mechanism for urging said door through opening and closing movements, said mechanism comprising a power shaft adapted to be selectively powered in opposite directions of rotation respectively corresponding to said door opening and closing movements, a pair of spaced apart door-opening and doorclosing sprockets disposed in freewheeling relation on said power shaft and each operatively connected to said door to respectively produce said opening and closing movements thereof, a driving rachet on each said door-opening and door-closing sprockets disposed in facing relation to each other, an actuating member fixedly connected to said power shaft in an interposed position between said facing driving rachets, and a pivotally mounted rachet-driving member having first and second operative ends operatively arranged to be pivoted by said actuating member in one direction so that said first end thereof is moved into driving relation with one said driving rachet and said second end is moved into a clearance position with respect to said other driving rachet, and when pivoted in a reverse direction said first end is disengaged from driving relation and said second end is moved from said clearance position into driving relation, whereby during an interval of operation only one said dooropening or door-closing sprocket is powered in rotation with said power shaft while the other is freewheeling thereon.
Claim 3
Dependent Claim
47 words
An improved power-transmitting mechanism as claimed in claim 1 wherein said actuating member is U-shaped and has bifulcated arms advantageously located on opposite sides of said rachet-driving member, one of said arms selectively engaging said rachet-driving member depending upon the direction of rotation of said power shaft.
Claim 4
Dependent Claim
25 words
An improved power-transmitting mechanism as claimed in claim 2 wherein said first and second operative ends of said rachet-driving member are formed as teeth-engaging pawls.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |