EP0087977A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Revolving door systems
Assignee: Besam AB
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Filing: 1983-03-01
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Granted: —
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Expires: 2003-03-01
Abstract
Abstract A controller driven revolving door system has facing spaced apart curved panels (20, 22) partially enclosing three equiangularly spaced center shaft coupled wings (14) and defining entry (26) and exit (28) openings. The controller automatically selectively directs traffic flow through the entry and exit openings and is responsive to a microwave motion detector (60) at the entry and a mat switch in a quarter-point position accessible to the exit. A DC motor (42) is coupled by a gearing assembly to the center shaft (37). The controller monitors current passing through the motor windings sensing shaft rotation. Responsive to the mat switch, the controller applies a resistive load to the DC motor windings to regeneratively brake the rotation of the door. The controller thereafter reverses the polarity of the motor windings causing the door to rotate in a reverse direction and back any individual out of the exit area. Drum edge switches (62) on the curved panels sense interference with foreign objects to cause the controller to regeneratively brake, halting rotation of the center shaft. A handicapped person switch (58) is provided to reduce motor current and reduce shaft rotation speed.
Inventors
- 👤 Stanley R. Heise
- 👤 Michael D. Blackston
- 👤 Michael B. Zekich
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 19:27
CPC Classifications
E; E05; E05G; E05G5/00; E05G5/003; E05F; E05F15/00; E05F15/40; E05F15/42; E05F15/44; E05F15/60; E05F15/603; E05F15/608; E05F15/70; E05F15/73; E05F15/611; E05F15/614; E05Y; E05Y2800/00; E05Y2800/10; E05Y2800/106; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
A revolving door system comprising: a rotatable center shaft defining an upright axis; a plurality of wings circumferentially disposed about the shaft rotatable about the axis; a pair of upright opposing panels disposed in facing spaced apart relationship to define a partially enclosed region bounding the wings and defining opposing first and second openings; means for rotating the shaft; controller means for actuating the shaft rotating means in a forward rotation direction characterized by: first sensing means for detecting the presence of a person entering the partially enclosed region from the first opening, the controller means responsive to the first sensing means for stopping rotation of the shaft means in the forward rotational direction and for thereafter actuating the rotation means in a direction opposite the first direction; whereby a person attempting to pass from the first opening to the second opening is prevented from doing so and is forced back to the first opening.
Claim 2
Dependent Claim
155 words
A revolving door system comprising: a rotatable center shaft defining an upright axis; a plurality of wings circumferentially disposed about the shaft rotatable about the axis; a pair of upright opposing panels disposed in facing spaced apart relationship to define a partially enclosed region bounding the wings and defining opposing first and second openings; means for rotating the shaft; controller means for actuating the shaft rotating means in a forward rotation direction characterized by: first sensing means for detecting the presence of a person entering the partially enclosed region from the first opening, the controller means responsive to the first sensing means for stopping rotation of the shaft means in the forward rotational direction and for thereafter actuating the rotation means in a direction opposite the first direction; whereby a person attempting to pass from the first opening to the second opening is prevented from doing so and is forced back to the first opening.
Claim 3
Dependent Claim
46 words
The invention as set forth in claim 1 and in which the means for rotating the shaft comprises a DC electric motor, and in which the controller means comprises means for coupling the motor in a regenerative mode to brake the rotation of the center shaft.
Claim 4
Dependent Claim
47 words
The invention as set forth in claim 2 and in which the controller means comprises means for monitoring the rotation of the wings, actuating the motor in response to a forward rotation of the wings and for braking the motor in response to a reverse rotation of
Claim 5
Dependent Claim
31 words
The invention as set forth in claim 3 and comprising indexing means for stopping rotation of the shaft at plural predetermined positions defined by quarter-point positions of the wings and panels.
Claim 6
Dependent Claim
27 words
The invention as set forth in claim 2 and comprising second sensor means responsive to a person at the second opening to initiate a normal rotation cycle.
Claim 7
Dependent Claim
40 words
The invention as set forth in claim 2 and comprising interference sensing means for sensing the presence of an interfer ing object, the sensing means coupled to the controller to brake the rotation means, thereby causing the shaft to stop.
Claim 8
Dependent Claim
46 words
The invention as set forth in claim 5 and in which the controller provides for an initial actuation of the shaft at a first rotational speed, and the invention comprises means for actuating the shaft at a second rotation speed less than the first rotational speed.
Claim 9
Dependent Claim
56 words
The invention as set forth in any of the preceding claims comprising second sensing means coupled to said rotating means for sensing the rotation of the wings, said second sensing means coupled to the controller means for actuating the rotating means to rotate the shaft, thereby causing automatic rotation of the wings upon initial manual rotation.
Claim 10
Dependent Claim
43 words
The invention as set forth in any of the preceding claims and in which the controller means comprises means for delaying rotation in the opposite direction after regenerative braking and comprising switch means responsive to the shaft position for terminating a rotation cycle.
Claim 11
Dependent Claim
55 words
The invention as set forth in any of the preceding claims comprising a microwave sensor for detecting the presence of an individual in the vicinity of the first sensing means and including a drum switch disposed vertically along the edge of the panels for detecting foreign objects and thereby braking the rotation of the shaft.
Claim 12
Dependent Claim
43 words
ll. The invention as set forth in any of the preceding claims comprising means for providing an alarm signal in response to the presence of an individual entering the area covered by said first sensing means and means for overriding the alarm signal.
References Cited (Backward Citations)
No citation records indexed.
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