Magnetic lock and key assembly

• US 9,528,297 B2
• Filed: 03/30/2015
• Issued: 12/27/2016
• Est. Priority Date: 03/30/2015
• Status: Active Grant

• Current Assignee: Rexnord Indistries LLC (Regal Rexnord Corp.)
• Original Assignee: Rexnord Indistries LLC (Regal Rexnord Corp.)
• Inventors: Gentile, Frank L.
• Primary Examiner(s): BOSWELL, CHRISTOPHER J
• Application Number:
  US14/672,360
• Publication Number:
  US 20160290011A1
• Time in Patent Office: 638 Days
• US Class Current: 1/1
• CPC Class Codes: E05B 47/0038 using permanent magnets
• CPC Class Codes: E05B 47/0045 keys with permanent magnets E05B47/0043, E05B47/0044, E05B73/0052 take precedence
• CPC Class Codes: E05B 67/365 with locking means in the form of balls or rollers

Abstract

A magnetic lock and key system including a magnetic lock that includes: a body, a lock element arranged at least partially within the body and moveable between a locked position and an unlocked position, a cap coupled to the body and defining a dome, and an arc magnet arranged within the body between the cap and the lock element, the arc magnet defining a chamfered edge and moveable between a first position corresponding with the locked position of the lock element and a second position corresponding to the unlocked position of the lock element; and a magnetic key arranged to engage the cap of the magnetic lock and including a key magnet moveable between a first position spaced apart from the dome of the cap, and a second position adjacent the dome of the cap, the key magnet defining a countersink corresponding to chamfered edge.

Claims

1. A magnetic lock and key system comprising:

a magnetic lock that includes

a body,

a lock element arranged at least partially within the body and moveable between a locked position and an unlocked position,

a cap coupled to the body and defining a dome, and

an arc magnet arranged within the body between the cap and the lock element, the arc magnet defining a chamfered edge and moveable between a first position corresponding with the locked position of the lock element and a second position corresponding to the unlocked position of the lock element; and

a magnetic key arranged to engage the cap of the magnetic lock and including a key magnet moveable between a first position spaced apart from the dome of the cap, and a second position adjacent the dome of the cap, the key magnet defining a countersink corresponding to the chamfered edge.

2. The magnetic lock and key system of claim 1, wherein the chamfered edge defines a profile, the countersink matching the profile.

3. The magnetic lock and key system of claim 2, wherein the profile defines an angle of about thirty degrees.

4. The magnetic lock and key system of claim 1, wherein the dome corresponds to the chamfered edge.

5. The magnetic lock and key system of claim 1, wherein the key magnet is free to rotate.

6. The magnetic lock and key system of claim 1, wherein the magnetic lock further includes a spring arranged to bias the arc magnet toward the first position.

7. The magnetic lock and key system of claim 6, wherein an attractive force is created between the key magnet and the arc magnet when the key magnet is in the second position, the attractive force overcoming the bias applied by the spring.

8. The magnetic lock and key system of claim 1, wherein the dome inhibits non-key magnets from actuating the magnetic lock.

9. The magnetic lock and key system of claim 1, wherein an air gap is defined between a top surface of the dome and the arc magnet, the air gap substantially inhibiting a non-key magnet from actuating the magnetic lock.

10. A magnetic lock for use with a magnetic key, the magnetic lock comprising:

a body;

a lock element arranged at least partially within the body and moveable between a locked position and an unlocked position;

a cap coupled to the body and defining a dome; and

an arc magnet arranged within the body between the cap and the lock element, the arc magnet defining a chamfered edge and moveable between a first position corresponding with the locked position of the lock element and a second position corresponding to the unlocked position of the lock element.

11. The magnetic lock of claim 10, further comprising a plunger arranged within the body, the arc magnet coupled to the plunger and moveable therewith to actuate the lock element.

12. The magnetic lock of claim 10, wherein the cap is rigidly coupled to the body.

13. The magnetic lock of claim 10, wherein the cap defines a shoulder configured to engage the magnetic key.

14. The magnetic lock of claim 10, wherein the dome defines an angled side wall and a substantially flat top surface.

15. The magnetic lock of claim 14, wherein the angled side wall is shaped to correspond to the chamfered edge.

16. The magnetic lock of claim 10, wherein the arc magnet includes a first half defining a north pole at the chamfered edge and a second half defining a south pole at the chamfered edge.

17. The magnetic lock of claim 10, wherein the chamfered edge defines about a thirty degree angle.

18. A magnetic key for use with a magnetic lock, the magnetic key comprising:

a handle;

a trigger coupled to the handle and rotatable relative thereto between a first position and a second position;

a collet coupled to the handle, configured to engage the magnetic lock, and defining a magnet aperture; and

a key magnet received in the magnet aperture and defining a chamfered countersink, the key magnet is free to rotate within the collet and is actuatable by the trigger between an on position and an off position.

19. The magnetic key of claim 18, wherein the countersink is substantially conically shaped and defines an angle of about thirty degrees.

20. The magnetic key of claim 18, wherein the key magnet defines a central aperture.