Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – With speed regulator
Patent
1997-07-15
1999-08-17
Stodola, Daniel P.
Movable or removable closures
Plural wings radiate from common pivot; i.e., revolving
With speed regulator
49 42, E05D 1502
Patent
active
059375809
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a power transmitting device for mechanically controlled doors and the like having a stationary part and a part displaceable relatively to the stationary part especially for revolving door of so called round-about type and similar constructions, namely doors and similar partitions wherein two or more often three door leaves or the like extend essentially radially from a central frame towards curved partitions in order to, during the movement of the frame and the door leaves extending therefrom around a central axis of the frame, define movable passage spaces moving from one side of the door to the other. The invention relates also to such devices utilized for other types of doors, gates, partitions and the like movable along a straight or curved path.
BACKGROUND OF THE INVENTION
For the operating of doors of above and similar kind up till now different solutions have been used. As an example may be mentioned power or motor devices which over appropriate transmission arrangements by means of belt or chain drives move the door and motor driven rollers which with constant force are pressed against a running path at the door so that they on rotation moves the door.
Known arrangements are because of their construction rather rigid and have small, in many cases no ability to give way and allow manual moving of the doors for instance on loss of electric power. For such reasons it occurs that you have to arrange special emergency operating devices so that the doors will not be blocked on interruption of electricity supply.
Doors of the kind mentioned above, both rotating and sliding ones, also require some sort of braking device in order to stop the movement of the door. At known operating devices the braking effect often is achieved in inductive way by short circuiting the driving motor or in a similar way.
PURPOSE OF THE INVENTION
One aspect of the invention is to bring about a new operating device which can be used both on driving and on braking of doors and the like of the kinds mentioned, wherein the device both provides a better function and makes it possible to simplify the construction and reduce the number of necessary components and on top of that includes an automatic safety function.
Another aspect is to bring about a new power transmission device having an automatic control and adjusting of the transmission means in relation to transmitted torque.
SUMMARY OF THE INVENTION
The novelty of the invention lies in the invention of the devices which transmit driving power and braking power and it is characterized by that adjacent a surface forming an engagement path and being the power transmitting element of the one construction part there is mounted an engagement means forming the power transmitting element of the other construction part wherein the engagement means is carried by a pivotable arm so arranged and dimensioned that a set angle of friction is achieved resulting in an automatic engaging of the engagement means with the engagement path with a force varying in relation to the torque transmitted .
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in the following with references to the attached drawings, on which
FIG. 1 is a top view of an embodiment illustrating the general principle of the power transmitting, driving and braking devices according to the invention,
FIGS. 2 and 3 as a side view partly in section and top view, respectively, illustrate the general construction of a rotating door with a preferred embodiment of the device according to this invention,
FIGS. 4 and 5 in a side view and a top view, respectively, and in an enlarged scale show broken out portions from FIGS. 2 and 3,
FIGS. 6 and 7 in a side view and a top view, respectively, in still larger scale illustrate the driving device according to the invention, and
FIGS. 8 and 9 in a side view and a top view, respectively, in the same scale as FIGS. 6 and 7 show the braking device according to the invention.
In the disclosed preferred embodiment wh
REFERENCES:
patent: 3766686 (1973-10-01), Sheckells
patent: 3968595 (1976-07-01), Sheckells
patent: 4669686 (1987-06-01), Huber et al.
patent: 4872285 (1989-10-01), Applemann
patent: 4976065 (1990-12-01), Beran et al.
Entre-Matic AB
Stodola Daniel P.
Thompson Hugh B.
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