Padlock with fully integrated dual locking mechanism with a lost code defining system

• US 9,464,460 B2
• Filed: 04/29/2015
• Issued: 10/11/2016
• Est. Priority Date: 05/07/2014
• Status: Active Grant

• Current Assignee: The Sun Lock Company Ltd.
• Original Assignee: The Sun Lock Company Ltd.
• Inventors: Lai, Karl
• Primary Examiner(s): Barrett, Suzanne
• Application Number:
  US14/699,253
• Publication Number:
  US 20150322692A1
• Time in Patent Office: 531 Days
• Field of Search: 70/21, 702/84, 702/85
• US Class Current: 1/1
• CPC Class Codes: E05B 37/0034 actuated by either
• CPC Class Codes: E05B 37/0058 by axial disengagement between hub and rim of tumbler discs or rings
• CPC Class Codes: E05B 37/025 in padlocks
• CPC Class Codes: E05B 37/14 in padlocks
• CPC Class Codes: E05B 67/02 Cases
• CPC Class Codes: E05B 67/08 Padlocks with shackles hinged on the case
• CPC Class Codes: E05B 67/22 Padlocks with sliding shackles, with or without rotary or pivotal movement
• CPC Class Codes: Y10T 70/415 Combination and/or key-controlled

Abstract

A dual locking padlock having a code locking mechanism and an overriding mechanism is disclosed. The housing has a spacer as its top portion, a stack of clutches forming a middle portion and a bottom portion having holes to receive screws from the spacer for securing the housing. Dials are rotatably mounted on the clutches for changing the combination code. The housing has a spindle having a channel to store the heel of a shackle. The spindle'"'"'s upward movement allows the shackle to be pulled upward to unlock the padlock. The spindle is allowed to move upward either when a correct combination code is used or when a key activates the overriding mechanism. With the overriding mechanism, the user can open the padlock with a backup key if the user forgets the combination code, and then reset the dials to a new combination code.

Claims

1. A padlock operable in a locked mode and in an opened mode, comprising:

a shackle having a heel and a toe;

a stack of clutches;

a plurality of dials, each dial having a substantially cylindrical outer surface;

a lock housing configured to store the heel of the shackle, wherein the shackle can be partially released from the lock housing from a first shackle position to a second shackle position, the lock housing comprising a top portion, a bottom portion, and a middle portion having a substantially cylindrical exterior surface formed by the stack of clutches, the plurality of dials movably mounted on the cylindrical exterior surface of the middle portion of the lock housing so as to expose an entirety of the cylindrical outer surface of each of the plurality of dials for forming a combination code;

a spindle disposed inside the lock housing and arranged to provide a code locking mechanism, the code locking mechanism configured to keep the padlock in the locked mode based on the combination code; and

an overriding mechanism disposed in relationship to the spindle, the overriding mechanism activatable to cause the padlock to operate in the opened mode, and wherein the shackle is in the first shackle position when the padlock is operated in the locked mode, and the shackle is in the second shackle position when the padlock is operated in the opened mode.

2. The padlock according to claim 1, wherein the spindle comprises one or more slots, and the top portion of the lock housing comprises one or more holes to receive one or more fasteners, the fasteners arranged to pass through the slots on the spindle and to reach the bottom portion so as to secure the bottom portion to the top portion.

3. The padlock according to claim 1, wherein the spindle comprises:

a channel to store the heel of the shackle; and

a latch disposed in relationship to the channel, the latch having a fork arranged to engage the heel and the spindle so as to prevent the shackle from moving from the first shackle position to the second shackle position.

4. The padlock according to claim 3, wherein the spindle is movably mounted on the bottom portion of the lock housing, and the spindle can be caused to move upward from the bottom portion in vertical movement to change from a first spindle position to a second spindle position, wherein the stack of clutches are arranged to control the vertical movement of the spindle, the clutches providing the cylindrical exterior surface, and wherein the dials are mounted over the cylindrical exterior surface in cooperation with the clutches such that when the combination code matches a predetermined code, the clutches allow the vertical movement of the spindle so that the shackle can be moved from the first shackle position to the second shackle position.

5. The padlock according to claim 3, wherein the overriding mechanism can be activated by a key, causing the fork of the latch to disengage the heel of the shackle from the spindle so as to allow the shackle to move from the first shackle position to the second shackle position when the spindle is in the first spindle position.

6. The padlock according to claim 4, wherein the stack of clutches include a first clutch and a last clutch, the last clutch arranged on top of the bottom portion of the lock housing, and wherein the top portion of the lock housing further comprises a spacer arranged on top of the first clutch and the spindle, wherein the spacer comprises:

a spacer hole in communication with the channel so as to allow placement of the heel of the shackle in the channel, and

a cutout zone to allow the spindle to move from the first spindle position to the second spindle position.

7. The padlock according to claim 6, wherein the top portion further comprises a top body having a plurality of extended clips, and the spacer comprises a plurality of locking channels, the locking channels arranged to receive the extended clips of the top body so as to secure the top body to the spacer.

8. The padlock according to claim 7, wherein the top portion further comprises a top lid mounted on the top body, the top lid comprises a first hole in communication with the spacer hole, and a second hole arranged to receive the toe of the shackle when the shackle is in the first shackle position.

9. The padlock according to claim 8, wherein the top lid further comprises:

a protrusion located in relationship to the second hole; and

a plurality of lid clips located on peripheral surface of the top lid, and wherein the spacer further comprises a protrusion-receiving hole dimensioned to receive the protrusion of the top lid, and wherein the top body further comprises a plurality of clip-receiving slots arranged to receive the lid clips, such that when the shackle is in the first shackle position, the top lid and the top body are in a locked position.

10. The padlock according to claim 4, wherein each of the clutches comprises an opening gap, and the spindle comprises a plurality of extended protrusions to align with the opening gaps of the clutches so as to allow the spindle to move from the first spindle position to the second spindle position.

11. The padlock according to claim 10, wherein each of the clutches comprises a plurality of outer-teeth receiving slots and each of the dials comprises a plurality of teeth to engage with the outer-teeth receiving slots of a clutch to control rotational movement of said clutch.

12. The padlock according to claim 5, wherein the heel of the shackle has an end portion with a larger diameter than remaining of the shackle and the channel of the spindle has a wider channel section than remaining of the channel, the wider channel section dimensioned to store the end portion of the heel, and wherein the fork of the latch is placed on top of the end portion of the heel in order to engage the heel and the spindle.

13. The padlock according to claim 12, wherein the wider channel section of the channel has a section edge such that when the shackle is located in the second shackle position, the top of the end portion of the heel contacts the section edge of the wider channel section.

14. The padlock according to claim 6, wherein the heel of the shackle has a shackle protrusion, and the spacer hole comprises a partial ring with a shackle-protrusion slot, the shackle-protrusion slot dimensioned to receive the shackle protrusion when the shackle is in the first shackle position, and when the shackle is in the second shackle position, the shackle protrusion moves upward and out of the shackle-protrusion slot, such that when the shackle is turned to move the shackle protrusion away from shack-protrusion slot, the shackle is prevented from moving downward.

15. The padlock according to claim 6, wherein the top portion further comprises a top body mounted on the spacer, the top body comprising a first hole and a second hole, the first hole in communication with the spacer hole to allow placement of the heel of the shackle in the channel, and a second hole arranged to receive the toe of the shackle, and wherein the receiving hole of the spacer comprises a screw hole, and the second hole of the top body comprises a further hole to receive a fastener arranged to fasten into the screw hole of the spacer so as to secure the top body to the spacer.

16. The padlock according to claim 15, wherein the top body can be removed from the spacer by removing the fastener from the screw hole when the shackle is in the second shackle position so as to allow a user to remove the dials from the cylindrical exterior surface to change the combination code.

17. The padlock according to claim 9, wherein, when the shackle is in the second shackle position, the top lid can be removed from the top body by disengaging the lid clips of the top lid from the clip-receiving slots of the top body, and the top body can be removed from the spacer by disengaging the extended clips of the top body from the locking channels of the spacer so as to allow a user to remove the dials from the cylindrical exterior surface to change the combination code.

18. The padlock according to claim 5, wherein the heel of the shackle has an end portion and a neck portion having a smaller diameter than the end portion, wherein the fork of the latch is placed in the neck portion and on top of the end portion so as to engage the heel and the spindle.

19. The padlock according to claim 1, wherein the dials can be removed from the cylindrical exterior surface when the shackle is in the second shackle position so as to allow a user to the change the combination code.

20. The padlock according to claim 19, wherein the top portion comprise a top body with a toe hole to receive the toe of the shackle when the shackle is in the first shackle position, and the spindle comprises a plurality of extended protrusions, and each of the dials comprises a plurality of teeth, and wherein the stack of clutches are rotatably mounted on the lock housing to provide the cylindrical exterior surface, each of the clutches comprises:

an opening gap arranged to engage with an extended protrusion of the spindle, and

a plurality of outer-teeth receiving slots arranged to engage with the teeth of a dial, and wherein the dials can be removed from cylindrical surface by

aligning the opening gaps of the clutches with the extended protrusions of the spindle so as to allow the spindle to move upward when the shackle moves upward;

moving the shackle upward to change the shackle from the first shackle position to the second shackle position;

removing the top body from the top portion; and

disengaging the teeth of the dials from the outer-teeth receiving slots of the clutches.