Electrically operated actuator and method

• US 6,282,931 B1
• Filed: 05/04/2000
• Issued: 09/04/2001
• Est. Priority Date: 09/13/1996
• Status: Expired due to Fees

• Current Assignee: Accells Technologies Ltd. (Ping Identity Corporation)
• Original Assignee: Accells Technologies Ltd. (Ping Identity Corporation)
• Inventors: Habib, Walid, Evans, Paul, Elpern, David G., Elpern, Stephen R., Peebles, Robb Allan, Brown, David Corbett, Padiak, Scott, Ward, Allen C.
• Primary Examiner(s): BARRETT, SUZANNE LALE DINO
• Application Number:
  US09/564,938
• Time in Patent Office: 488 Days
• Field of Search: 702/77--83, 702/75, 292/201, 292/144, 292/336.3, 340/825.31, 361/172
• US Class Current: 70/279.1
• CPC Class Codes: E05B 17/22 Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators E05B39/00 - E05B45/00 take precedence
• CPC Class Codes: E05B 2047/002 Geared transmissions
• CPC Class Codes: E05B 2047/0023 Nuts or nut-like elements moving along a driven threaded axle
• CPC Class Codes: E05B 2047/0025 in the form of grooves
• CPC Class Codes: E05B 2047/0084 Key or electric means; Emergency release
• CPC Class Codes: E05B 2047/0091 Retrofittable electric locks, e.g. an electric module can be attached to an existing manual lock electrically driven keys E05B2047/0083
• CPC Class Codes: E05B 2047/0094 Mechanical aspects of remotely controlled locks electronic locks G07C9/00
• CPC Class Codes: E05B 2047/0097 including means for monitoring voltage, e.g. for indicating low battery state
• CPC Class Codes: E05B 47/0012 with rotary electromotors actuators with rotary electromotors per se H02K7/06, H02K23/68
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: Y10T 292/1082 Motor
• CPC Class Codes: Y10T 292/57 Operators with knobs or handles
• CPC Class Codes: Y10T 70/7051 Using a powered device [e.g., motor]
• CPC Class Codes: Y10T 70/7107 And alternately mechanically actuated by a key, dial, etc.

Abstract

A method is provided for retrofitting an existing dead-bolt assembly with an electrically operated actuator (12, 112, 212, 312, 800). The electrically operated actuator automatically operates the dead-bolt assembly while preserving manual operation of the lock. The actuator assembly has rotating means for rotation of the drive bar (18), which in turn extends or retracts the bolt (14) of the lock. The rotating means may be a lever (28, 128, 238, 328, 438, 818) attached to the drive bar (18) that is pivotable about the axis of rotation of the drive bar (18). The actuator assembly has driving means that forces the rotating means to rotate. The driving means is responsive to an electrical signal, which, for example, may be initiated from a remote-controlled transmitter (502, 602). The driving means may include a motor (20, 120, 220) for rotating a rod (22, 122, 222, 322) that in turn operates an assembly that rotates or drives the rotating means. In response to an electrical signal, the driving means actuates the rotating means to affect either a locking or unlocking operation, which operations are always completed by placing the actuator assembly in a state whereby the bolt of the lock may subsequently be extended or retracted manually, or automatically by the driving means.

Claims

1. An electrically operated actuator in combination with a dead bolt assembly, the dead bolt assembly comprising a lock having a drive bar and a bolt, the bolt being operably coupled to the drive bar such that rotation of the drive bar extends and retracts the bolt linearly, the actuator comprising:

means for rotating the drive bar to extend and retract the bolt;

means for driving said rotating means, said driving means being responsive to an electrical signal;

wherein said electrical signal is generated by;

a wireless transmitter that transmits a request to actuate the actuator;

a wireless receiver that receives the request to actuate the actuator; and

a control circuit, operably connected to said wireless receiver, the control circuit providing said electrical signal to said driving means if the request is valid; and

wherein said rotating means comprises;

a resilient lever attached to the drive bar, said resilient lever being pivotal about an axis that is coaxial to an axis of rotation of the drive bar; and

wherein said driving means comprises;

a motor capable of rotating a threaded rod that extends from said motor;

a threaded member screwed onto said threaded rod;

a guide preventing rotation of said threaded member; and

said threaded member being adapted to frictionally engage and to rotate said resilient lever.

2. The actuator of claim 1 wherein said threaded member includes a protrusion and said guide forms a channel wherein said protrusion is slidably retained.

3. The actuator of claim 1 wherein said threaded rod is oriented to be perpendicular to the bolt.

4. The actuator of claim 1 wherein said threaded rod is oriented to be parallel to the bolt.

15. The actuator of claim 1 wherein the control circuit comprises a plurality of sensing circuits for sensing a status of the dead bolt assembly.

16. The actuator of claim 15 wherein the status includes at least one of a low battery indication, a motor current, and a lock position.

17. The actuator of claim 16 wherein the transmitter is a first transceiver and the receiver is a second transceiver and the status is transmitted to the first transceiver by the second transceiver.

18. The actuator of claim 17 wherein the status is reflected at the first transceiver by an audible or visual indication.

5. An electrically operated actuator in combination with a dead bolt assembly, the dead bolt assembly comprising a lock having a drive bar and a bolt, the bolt being operably coupled to the drive bar such that rotation of the drive bar extends and retracts the bolt linearly, the actuator comprising:

means for rotating the drive bar to extend and retract the bolt;

means for driving said rotating means, said driving means being responsive to an electrical signal;

wherein said electrical signal is generated by;

a wireless transmitter that transmits a request to actuate the actuator;

a wireless receiver that receives the request to actuate the actuator; and

a control circuit, operably connected to said wireless receiver, the control circuit providing said electrical signal to said driving means if the request is valid; and

wherein said rotating means comprises;

a lever attached to the drive bar, said lever being pivotal about an axis that is coaxial to an axis of rotation of the drive bar; and

said driving means comprises;

a motor capable of bidirectional rotation of a rod extending from said motor;

said rod having a first gear with a threaded exterior surface;

a second gear having teeth, said second gear being oriented to engage the threaded exterior surface of the first gear such that rotation of the first gear causes rotation of the second gear; and

said second gear having a plurality of protrusions positioned on a surface of said second gear to contact and to rotate said lever.

6. The actuator of claim 5 wherein said second gear is circular.

7. The actuator of claim 5 wherein said rod is oriented perpendicular to the bolt.

8. The actuator of claim 5 wherein said second gear has three protrusions positioned on its surface.

9. The actuator of claim 5 wherein said lever is resilient in a direction parallel to the axis of rotation of said drive bar.

10. The actuator of claim 5 wherein said second gear has two protrusions positioned on its surface.

11. The actuator of claim 5 wherein said rod is oriented parallel to the bolt.

12. An electrically operated actuator in combination with a dead bolt assembly, the dead bolt assembly comprising a lock having a drive bar and a bolt, the bolt being operably coupled to the drive bar such that rotation of the drive bar extends and retracts the bolt linearly, the actuator comprising:

means for rotating the drive bar to extend and retract the bolt;

means for driving said rotating means, said driving means being responsive to an electrical signal;

wherein said electrical signal is generated by;

a wireless transmitter that transmits a request to actuate the actuator;

a wireless receiver that receives the request to actuate the actuator; and

a control circuit, operably connected to said wireless receiver, the control circuit providing said electrical signal to said driving means if the request is valid; and

wherein said rotating means comprises;

a lever attached to the drive bar, said lever being pivotal about an axis that is coaxial to an axis of rotation of the drive bar; and

said driving means comprises;

a first solenoid having a first core that extends and retracts in response to a first solenoid signal, said first core being positioned to pivot said lever from a first position wherein said bolt is completely retracted and a second position, wherein said bolt is completely extended; and

a second solenoid having a second core that extends and retracts in response to a second solenoid signal, said second core being positioned to pivot said lever from said second position to said first position.

13. The actuator of claim 12 wherein said first and second solenoids are oriented such that the cores of said first and second solenoids are perpendicular to the bolt.

14. The actuator of claim 12 wherein said first and second solenoids are oriented such that the cores of said first and second solenoids are parallel to the bolt.

19. A method for controlling power to a receiver that receives a signal indicating a status of a lock controlled by an electrically operated actuator, the method comprising the steps of:

(a) switching on power to the receiver after transmitting a lock or unlock signal; and

(b) switching power off to the receiver upon the first to occur of a predetermined period of time or a receipt of the signal indicating the status of the lock; and

wherein the status includes at least one of lock status, unlock status, rotor current sense, and low battery condition.

20. The method of claim 19 further comprising the step of making a visually perceptible indication of the status.

21. The method of claim 19 further comprising the step of making an audible indication of the status.

22. A method for controlling power to a receiver that receives a signal that is used to extend or retract a bolt in a lock controlled by an electrically operated actuator, the method comprising the steps of:

(a) periodically switching power on to the receiver;

(b) switching power to the receiver off after a valid signal is received indicating that the bolt should be extended or retracted; and

(c) switching power to the receiver off after a predetermined period of time, if a valid signal is not received during the predetermined amount of time.

23. The method of claim 22 wherein said step of periodically switching power on to the receiver includes switching power on to the receiver approximately every 200 milliseconds.

24. The method of claim 22 wherein said predetermined amount of time is about 2 to 5 milliseconds.

25. The method of claim 22 wherein step (a) further includes maintaining power to the receiver if a valid preamble signal is received by the receiver, the valid preamble signal being an indication that a transmitter is transmitting.

26. The method of claim 25 wherein power is maintained until the transmitter completes a transmission.

27. An electrically operated actuator in combination with a dead bolt assembly, the dead bolt assembly comprising a lock having a drive bar and a bolt, the bolt being operably coupled to the drive bar such that rotation of the drive bar extends and retracts the bolt linearly, the actuator comprising:

a drive bar attachment for rotating the drive bar to extend and retract the bolt;

a motor operably coupled to the drive bar attachment to rotate the drive bar attachment, the motor being responsive to an electrical signal;

wherein said electrical signal is generated by;

a wireless transmitter that transmits a request to actuate the actuator;

a wireless receiver that receives the request to actuate the actuator;

a control circuit, operably connected to said wireless receiver, the control circuit providing said electrical signal to said motor if the request is valid; and

wherein the control circuit comprises at least one sensing circuit for sensing a status of the dead bolt assembly.

28. The actuator of claim 27 wherein the status includes at least one of a low battery indication and a lock position.

29. An electrically operated actuator in combination with a dead bolt assembly, the dead bolt assembly comprising a lock having a drive bar and a bolt, the bolt being operably coupled to the drive bar such that rotation of the drive bar extends and retracts the bolt linearly, the actuator comprising:

a drive bar attachment for rotating the drive bar to extend and retract the bolt;

a motor operably coupled to the drive bar attachment to rotate the drive bar attachment, the motor being responsive to an electrical signal;

wherein said electrical signal is generated by;

a wireless transmitter that transmits a request to actuate the actuator;

a wireless receiver that receives the request to actuate the actuator;

a control circuit, operably connected to said wireless receiver, the control circuit providing said electrical signal to said motor if the request is valid; and

wherein the wireless transmitter is a first transceiver and the wireless receiver is a second transceiver and a status of the dead bolt assembly is transmitted to the first transceiver by the second transceiver.

30. The actuator of claim 29 wherein the status is reflected at the first transceiver by an audible or visual indication.

31. An electrically operated actuator in combination with a dead bolt assembly, the dead bolt assembly comprising a lock having a drive bar and a bolt, the bolt being operably coupled to the drive bar such that rotation of the drive bar extends and retracts the bolt linearly, the actuator comprising:

means for rotating the drive bar to extend and retract the bolt;

means for driving said rotating means, said driving means being responsive to an electrical signal;

means for disengaging said rotating means from said driving means for manual rotation of the drive bar;

wherein said electrical signal is generated by;

a wireless transmitter that transmits a request to actuate the actuator;

a wireless receiver that receives the request to actuate the actuator; and

a control circuit, operably connected to said wireless receiver, the control circuit providing said electrical signal to said driving means if the request is valid.

32. The actuator of claim 31 wherein the rotating means comprises a drive bar attachment.

33. The actuator of claim 31 wherein the driving means comprises a motor.

34. The actuator of claim 32 wherein the means for disengaging comprises a selective contact between the drive bar attachment and the driving means.

35. An electrically operated actuator in combination with a dead bolt assembly, the dead bolt assembly comprising a lock having a drive bar and a bolt, the bolt being operably coupled to the drive bar such that rotation of the drive bar extends and retracts the bolt linearly, the actuator comprising:

a drive bar attachment that is coupled to the drive bar to extend and retract the bolt linearly;

a motor being responsive to an electrical signal;

a gear assembly operably coupled to the motor to respond to rotation of said motor, the gear assembly being coupled to said drive bar attachment to engage said drive bar attachment to extend or retract the bolt linearly, and the gear assembly being coupled to said drive bar attachment to disengage from said drive bar attachment for manual rotation of the drive bar;

wherein said electrical signal is generated by a circuit comprising;

a wireless transmitter that transmits a request to actuate the actuator;

a wireless receiver that receives the request to actuate the actuator;

a control circuit operably connected to said receiver, the control circuit providing said electrical signal to said motor if the request is valid.

36. The actuator of claim 35 wherein the gear assembly includes a gear with at least one protrusion and said at least one protrusion is adapted to engage said drive bar attachment to extend and retract the bolt linearly.

37. The actuator of claim 36 wherein said at least one protrusion is adapted to frictionally engage said drive bar attachment to extend and retract the bolt linearly.

38. The actuator of claim 36 wherein the gear has teeth on an arcuate perimeter and the at least one protrusion extends outwardly from a surface of the gear, the surface being orthogonal to the arcuate perimeter of the gear.

39. The actuator of claim 35 wherein said drive bar attachment is a lever that is coupled to the drive bar.

40. The actuator of claim 36 wherein the at least one protrusion is also adapted to disengage with said drive bar attachment in response to rotation of said drive bar attachment for fail safe operation.

41. The actuator of claim 40 wherein the at least one protrusion is also adapted to flexibly disengage with said drive bar attachment.

42. The actuator of claim 36 wherein the at least one protrusion is adapted to disengage with said drive bar attachment in response to rotation of the gear assembly to place the drive bar attachment in a state whereby the bolt may be extended or retracted manually.

43. The actuator of claim 35 wherein the control circuit comprises at least one sensing circuit for sensing a status of the dead bolt assembly and wherein the status includes at least one of a low battery indication, a motor current, and a lock position.

44. The actuator of claim 35 wherein the wireless transmitter is a first transceiver and the wireless receiver is a second transceiver and a status of the dead bolt assembly is transmitted to the first transceiver by the second transceiver.

45. The actuator of claim 38 wherein the status is reflected at the first transceiver by an audible or visual indication.