Locking system for a door

• US 20050081581A1
• Filed: 10/16/2003
• Published: 04/21/2005
• Est. Priority Date: 10/16/2003
• Status: Active Grant

• Current Assignee: William D. Caldwell, William J. Caldwell
• Original Assignee: William D. Caldwell, William J. Caldwell
• Inventors: Caldwell, William D., Caldwell, William J.
• Granted Patent: US 6,923,028 B2
• Time in Patent Office: Days
• US Class Current: 70/210
• CPC Class Codes: E05B 17/2023 Loose pins, screws, or the like; Portable devices
• CPC Class Codes: E05B 47/0696 locking the bolt by an electromagnet in the striker
• CPC Class Codes: E05B 67/383 Staples or the like for padlocks; Lock slings; Arrangements on locks to cooperate with padlocks
• CPC Class Codes: E05B 77/44 Burglar prevention, e.g. protecting against opening by unauthorised tools E05B77/28 takes precedence
• CPC Class Codes: E05B 83/12 for back doors of vans E05B83/04, E05B83/08 take precedence
• CPC Class Codes: E05C 9/048 externally mounted on the wing, i.e. surface mounted E05C9/008 takes precedence
• CPC Class Codes: Y10S 292/32 Freight car door fasteners
• CPC Class Codes: Y10T 292/1025 Padlock or seal catch
• CPC Class Codes: Y10T 292/1028 Sliding catch
• CPC Class Codes: Y10T 70/498 Shields or canopies
• CPC Class Codes: Y10T 70/5199 Swinging door
• CPC Class Codes: Y10T 70/5319 Sliding
• CPC Class Codes: Y10T 70/5739 With padlock
• CPC Class Codes: Y10T 70/577 Locked stationary
• CPC Class Codes: Y10T 70/5779 With padlock

Abstract

A security locking system for trailers that features an interior locking bar that is controlled from the outside. The locking bar is traversed in a linear motion parallel to the door by means of a toggle mechanism. The bar is guided into the locking mechanism by two guides mounted to the inside of the trailer door. The toggle mechanism is turned using a common trailer latch that also locks by use of a key. Alternatively the latch could be modified to lock or unlock by means of a remote. Once the latch is turned all the way (90 degrees), it will raise the locking bar into the upper secure bracket. The lower part of the locking bar will be lowered into the lock housing which is hidden just under the trailer floor; it will then be in position in the locking mechanism for the key pin to be inserted and then locked. The locking mechanism can also be modified to be controlled by means of a remote.

Claims

1. A security locking system for a door comprising:

a locking bar secured to and slidably positioned on said door;

a lock housing positioned adjacent the door for receiving the locking bar,

a securing means for retaining the locking bar in the lock housing whereby the door is secured in a locked position;

means mounted on said door for advancing the locking bar into position in the lock housing;

an aperture in the end of the locking bar that is received in the lock housing; and

a pin positioned in said aperture, said pin engaging the lock housing to retain the locking bar in the lock housing.

8. The locking system of claim 1 further including a lock to secure said pin in the aperture of the locking bar and said locking bar in the lock housing.

9. The locking system of claim 1 wherein the locking bar is positioned on the interior side of a door on an enclosed trailer.

10. The locking system of claim 9 wherein the lock housing is positioned adjacent the floor of the trailer.

11. The locking system of claim 1 wherein the locking pin is moved by means of an electric control to lock and unlock the door.

12. The locking system of claim 11 wherein the electric control is a solenoid.

2. (canceled)

3. (canceled)

4. (canceled)

5. (canceled)

6. (canceled)

7. (canceled)

13. A security system for a compartment defined in part by an upper wall, a lower wall, opposing sides and a door, said door, when closed, having an interior surface and an exterior surface comprising

(a) a locking member slidably engaged to said interior surface and having a lower end movable upon movement of said locking member from a first position exteriorly of said lower wall to a second position interiorly of said lower wall;

(b) engagement means engaged by said lower end when in said first position preventing the opening of said door; and

(c) retention means engageable with said lower end when said lower end is in said first position to prevent movement of said locking member and said lower end to said second position.

14. A security member according to claim 13 wherein said retention means includes a passageway in said lower end and a pin extending through said passageway.

15. A security member according to claim 14 further including a lock having a hasp which, when closed, cooperates with another portion of said lock to define an opening and wherein said pin includes an enlargement preventing movement thereof through said opening when said lock is closed.

16. A security member according to claim 15 wherein said retention means further includes an exterior housing extending downwardly below said lower wall and positioned to receive said lower end when in said lower position, an aperture in said housing for receiving said pin, said aperture positioned to permit said pin introduced therein to extend through said passageway to a position at which said lock may be closed with said enlargement on the opposite side of said hasp from said lower end.

17. A security system for a compartment defined in part by an upper wall, a lower wall, opposing sides and a door, said door, when closed, having an interior surface and an exterior surface comprising

(a) a locking member slidably engaged to said interior surface and having a lower end movable upon movement of said locking member from a first position exteriorly of said lower wall to a second position interiorly of said lower wall;

(b) engagement means engaged by said lower end when in said first position preventing the opening of said door;

(c) retention means engageable with said lower end when said lower end is in said first position to prevent movement of said locking member and said lower end to said second position;

(d) a securing member slidably engaged to said interior surface and having an upper end movable from an upper position engageable with a stop member adjacent said upper wall to a lower position below said stop member; and

(e) means interconnecting said locking member and said securing member such that movement of said interconnecting means in a first direction causes said locking member to move from said first position to said second position and said securing member to move from said upper position to said lower position and movement of said interconnecting means in a second direction causes said locking member to move from said second position to said first position and said securing member to move from said lower position to said upper position.

18. A security member according to claim 17 wherein said retention means includes a passageway in said lower end and a pin extending through said passageway.

19. A security member according to claim 18 further including a lock having a hasp which, when closed, cooperates with another portion of said lock to define an opening and wherein said pin includes an enlargement preventing movement thereof through said opening when said lock is closed.

20. A security member according to claim 19 wherein said retention means further includes an exterior housing extending downwardly below said lower wall and positioned to receive said lower end when in said lower position, an aperture in said housing for receiving said pin, said aperture positioned to permit said pin introduced therein to extend through said passageway to a position at which said lock may be closed with said enlargement on the opposite side of said hasp from said lower end.