Claims
- 1. A door operating device for opening and closing a door in an opening in a wall, said device comprising in combination:
- a linkage having first means for connecting to a door and second means for connecting to a wall,
- reversible electric motor means for driving said linkage for moving said door toward an open condition when said electric motor means is driven in a first direction and for moving said door toward a closed condition when said electric motor means is driven in a second direction,
- clutch means for connecting and disconnecting said electric motor means to said linkage,
- means for engaging said clutch means upon the direction of electric power to said reversible motor means and for disengaging said clutch means upon the termination of electric power to said electric motor means,
- start means for receiving an instruction to initiate the operation of said device,
- door open sensor means for detecting that said door is in an open condition,
- door closed sensor means for detecting that said door is in an open condition, and
- control means connected to said electric motor means and responsive to said door open sensor means, said door closed sensor means, and said start means, for directing electric power to said motor means upon actuation of said start means and for terminating electric power to said motor means upon receipt of a signal from one of said door open sensor means and said door closed sensor means.
- 2. A door opening devise in accordance with claim 1 wherein said clutch means is electrically operated.
- 3. A door opening device in accordance in claim 2 wherein said control means simultaneously directs power to said electric motor means and to said clutch means.
- 4. A door opening device in accordance with claim 2 wherein said clutch means comprises a solenoid.
- 5. A door opening device in accordance with claim 2 wherein said clutch means is engaged to drivingly connect said motor to said linkage when electric power is applied to said clutch means and is disengaged when electric power to said clutch means is terminated.
- 6. A door opening device in accordance with claim 2 wherein said clutch means will engage and disengage to convey rotational power from said motor to said linkage when said motor is operated in either a first rotational direction or a second rotational direction opposite said first rotational direction.
- 7. A door opening device in accordance with claim 1 wherein said clutch means further comprises
- a rotatable output shaft drivingly connected to said motor,
- an annular locking member around said shaft,
- said locking member locked against axial movement along said shaft,
- said shaft rotatable within said locking member,
- an engagement member on said shaft, said engagement member longitudinally slideable on said shaft and locked for rotation with said shaft,
- a protrusion on one of said locking members and said engagement member, and
- an indentation on the other of said locking members and said engagement member positioned for receiving said protrusion when said engagement member is moved against said locking member.
- 8. A door opening device in accordance with claim 7 wherein said locking member is non-rotatably attached to an arm for rotating said arm when said protrusion engages said indentation.
- 9. A door opening device in accordance with claim 7 and further including a gear integral with said locking member.
- 10. A door opening device in accordance with claim 7 and further including a solenoid having an output shaft, said solenoid output shaft drivingly connected to said engagement member for longitudinally moving said engagement member along said shaft.
- 11. A door opening device in accordance with claim 1 wherein said clutch means further comprises a shaft mounted for both axial and rotational movements.
- 12. A door opening device in accordance with claim 11 wherein said clutch means further comprises
- a first annular member on said shaft,
- said first annular member locked for axial movement with said shaft,
- a second annular member on said shaft, and
- said shaft axially slideable within said second annular member.
- 13. A door opening device in accordance with claim 12 and further comprising a solenoid for providing axial movement to said shaft.
- 14. A door opening devise in accordance with claim 11 wherein said clutch means further comprises
- a first annular member on said shaft, said first annular member locked for rotational movement with said shaft,
- a second annular member mounted for rotation independent of said shaft, and
- one of said first and said second annular members mounted for axial movement with said shaft,
- the other of said first and said second annular members locked against axial movement with said shaft, and
- locking means on said first annular member and said second annular member for selectively locking and unlocking said second annular member for rotation with said first annular member.
- 15. A door opening devise in accordance with claim 14 and further comprising a solenoid, said solenoid for providing axial movement to said shaft.
- 16. A door opening devise in accordance with claim 15 and further comprising a lever arm for conveying axial movement to said shaft.
- 17. A door opening devise in accordance with claim 14 wherein said locking means comprises at least one protrusion on one of said first and second annular members and at least one complementary indentation on the other of said first and second annular members.
- 18. A door opening devise in accordance with claim 17 wherein said at least one protrusion and said at least one indentation are shaped to force said first and second members out of engagement with each other in the event a torque applied through said shaft to said motor exceeds the torque limits of said motor.
- 19. A door opening device in accordance with claim 1 wherein said clutch means further comprises
- an axially moveable and rotationally moveable shaft,
- a first annular member on said shaft locked for rotational movement with said shaft,
- a second annular member on said shaft, said second annular member free to rotate independent of said shaft, and
- locking means between said first annular member and said second annular member for selectively locking and unlocking said second annular member for rotation with-said first annular member.
- 20. A door opening device in accordance with claim 19 wherein said locking means comprises at least one protrusion on one of said first and second annular members and at least on complementary-indentation on the other of said first and second annular members.
- 21. A door opening device in accordance with claim 20 wherein said at least one protrusion and said at least one indentation are shaped to force said first and second members out of engagement with each other in the event a torque applied through said shaft to said motor exceeds the torque limits of said motor.
Parent Case Info
This is a continuation-in-part of my copending prior application filed Jun. 2, 1997 and assigned Ser. No. 08/867,284, now U.S. Pat. No. 5,930,954, which was a continuation of my prior application filed May 16, 1994 and assigned Ser. No. 08/242,969, now U.S. Pat. No. 5,634,296.
US Referenced Citations (14)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
867284 |
Jun 1997 |
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