Combination padlock construction with positive visual indicator

• US 6,035,672 A
• Filed: 12/23/1998
• Issued: 03/14/2000
• Est. Priority Date: 12/23/1998
• Status: Expired due to Fees

• Current Assignee: The Sun Lock Company Ltd.
• Original Assignee: The Sun Lock Company Ltd.
• Inventors: Lai, Eric
• Primary Examiner(s): JAYNE, DARNELL M
• Application Number:
  US09/219,911
• Time in Patent Office: 447 Days
• Field of Search: 70/25, 70/312, 70/334, 70/52, 70/51, 70/22, 70/318, 70/333 R, 70/27, 70/54, 70/DIG. 44, 70/432, 70/441, 70/330, 70/315
• US Class Current: 70/25
• CPC Class Codes: E05B 17/002 Weather or dirt protection E05B15/029, E05B17/14 take precedence; for vehicle locks E05B77/34
• CPC Class Codes: E05B 37/025 in padlocks
• CPC Class Codes: Y10T 70/424 Sliding
• CPC Class Codes: Y10T 70/7305 Manually operable
• CPC Class Codes: Y10T 70/7322 Permutation

Abstract

By providing an automatically displayed, easily seen, positive visual indicator on a combination lock each time the combination lock is placed in its combination set or re-set position, a unique, easily used, enhanced combination lock is realized. Preferably, the visual indicator is automatically displayed upon entry of the lock into its combination setting or resetting position, thereby providing the user with a positive, readily seen, visual display clearly informing the user that the combination sequence may be altered. Furthermore, the lock construction of the present invention is constructed with the interior chambers thereof virtually sealed from ambient surroundings, thereby preventing unwanted contamination from entering the interior of the lock and the rotating components thereof. In this way, degradation by contamination is virtually eliminated. Finally, the present invention preferably employs a minimum number of components in combination with a housing and a movable shackle in order to provide the desired, unique combination lock construction of this invention. As a result, a cost effective, high quality combination lock is attained.

Claims

1. A combination lock constructed for ease of use, while also substantially eliminating the ability of unauthorized persons from opening the lock without knowledge of the combination, said combination lock comprising:

A. a housing incorporating

a. an elongated bore longitudinally extending through the housing and comprising

1. a first portal formed on one end of the bore, and,

2. a second portal formed on the opposed end of the bore,

b. a plurality of dial receiving zones formed in the housing, each of said receiving zones extending substantially perpendicularly to the axis of the elongated bore,

c. an elongated release channel formed in the bore and axially extending therewith, said elongated release channel defining a zone for enabling the opening of the combination lock;

B. a shackle movable between a first locked position, a second unlocked position, and a third combination set position, said shackle comprising a generally J-shape, incorporating

a. a short leg having a terminating end constructed for cooperative locking and unlocking interengagement with the housing, and

b. a long leg

3. The combination lock defined in claim 1, wherein said elongated bore comprises a first, a second, and a third zone, each of said zones comprising different diameters with the third zone comprising the smallest diameter and incorporating the second portal, the first zone comprising the largest diameter and incorporating the first portal, and the second zone comprising an intermediate diameter and being positioned between the first and third zones.

5. The combination lock defined in claim 3, wherein said shackle is further defined as comprising a locking ring receiving slot and two radially extending protrusions formed on an outer surface of the long leg thereof in juxtaposed, spaced, aligned, axial relationship to each other, said slot and one of said protrusions defining a fixed axial length for said long leg, and the combination lock is further defined as comprising a washer, a spacer, and a locking ring, each of which are constructed for cooperating with the plurality of tumbler sleeves mounted to the long leg of the shackle for defining an overall length substantially equivalent to the axial length established between the protrusion and the slot, whereby rotation of each tumbler sleeve is provided, while eliminating axial translational movement thereof.

7. The combination lock defined in claim 5, wherein the axial length of the third zone of the elongated bore is less than the axial length of the terminating end section of the shackle between its terminating end and the locking ring, thereby assuring that a portion of the shackle extends through the second portal of the elongated bore when desired.

8. The combination lock defined in claim 3, and further comprising

F. a sealing cap mounted in an open end of the elongated bore and constructed for effectively closing the bore with the tumbler sleeves mounted therein, preventing entry of any contamination into said bore.

9. The combination lock defined in claim 7, wherein said sealing cap is further defined as having a diameter substantially equivalent to the first portal of the elongated bore for enabling the sealing cap to be forced under pressure into said first portal.

10. The combination lock defined in claim 8, wherein said sealing cap is further defined as comprising a substantially circular shaped aperture, having a diameter slightly greater than the diameter of the shackle and two diametrically opposed radially extending slots constructed for cooperating with protrusions formed on the outer surface of the shackle, thereby defining two entry zones for controlling the axial movement of the shackle relative to the sealing cap.

11. The combination lock defined in claim 9, wherein said sealing cap is further defined as comprising an internal ledge formed below the aperture and the radial slots for cooperating with the protrusions of the shackle for controlling the axial movement of the shackle relative thereto.

12. The combination lock defined in claim 8, wherein said shackle comprises at least one protrusion mounted on the outside surface of the long leg thereof and said sealing cap is further defined as comprising a substantially circular shaped aperture, having a diameter slightly greater than the diameter of the shackle, and two diametrically opposed radially extending slots constructed for cooperating with the protrusion formed on the outer surface of the shackle, thereby defining two entry zones for controlling the axial movement of the shackle relative to the sealing cap.

13. The combination lock defined in claim 1, wherein the tumbler locking surface of each dial is further defined as comprising a plurality of radial slots formed therein constructed for cooperating interengagement with the radially extending fin of the tumbler sleeve to assure secure, controlled, cooperative interengagement therewith and simultaneous rotation of the tumbler sleeve with the dial when the fin of the tumbler sleeve is engaged with a radial slot of the dial.

14. The combination lock defined in claim 12, wherein the radially extending fin of each tumbler sleeve is further defined as comprising a longitudinal dimension substantially equivalent to the longitudinal width of the dial, thereby assuring interengagement of the radially extending fin and a radial slot of the dial when the combination lock is in the secured and locked position, thereby providing the ability of both the dial and the tumbler sleeve to freely rotate relative to the axis of the long leg of the shackle.

15. The combination lock defined in claim 13, wherein the long leg of the shackle, with the plurality of tumbler sleeves mounted thereto and positioned in the elongated release channel, is capable of axial movement within the elongated bore relative to the plurality of dials to effectively remove the radially extending fin of the tumbler sleeves from cooperating interengagement with the tumbler locking surface of the dial, thereby enabling the dial to rotate about the axis of the shackle independently of the tumbler sleeves, and indicia on the dials to define the release combination.

16. The combination lock defined in claim 1 and further comprising

F. a plurality of slots formed on a parallel, facing surface of the dial receiving zone for cooperating with the release channel and the radially extending fin of each tumbler sleeve, and constructed for providing a sound simulating the sound produced when the fin of a tumbler is positioned in the release channel.

17. The combination lock defined in claim 15, wherein said plurality of slots are further defined as being formed on the upper surface of said juxtaposed, spaced, parallel, facing surfaces peripherally surrounding a central bore in axially spaced locations relative to the release channel.

19. The combination lock defined in claim 17, wherein each of said dials is further defined as comprising a slot formed on the outer surface thereof between each adjacent indicia bearing panel.

2. cooperatively mounted in the elongated bore of the housing extending through the first portal thereof for axial movement and pivoting movement relative to the first portal and the elongated bore, andcomprising a terminating end portion positioned adjacent the second portal of the elongated bore when the shackle is in its first locked position and extending outwardly from the second portal when the shackle is in its combination set position;

C. a plurality of tumbler sleeves, each of said tumbler sleeves

a. rotationally mounted to the long leg of the shackle for rotational movement about the central axis thereof, and

b. incorporating a radially extending fin formed on the outside surface thereof and constructed for cooperative association with the elongated release channel for preventing axial movement of the long leg of the shackle as well as enabling axial movement thereof when each of said radial fins are positioned in the elongated release channel; and

D. a plurality of dials each of said dials

a. mounted in a dial receiving zone of the housing,

b. peripherally surrounding a tumbler sleeve for cooperating therewith, and

c. comprising an inside surface formed by a tumbler locking surface and a tumbler release surface;

whereby a combination lock construction is attained which is quickly and easily assembled with a minimum number of components and provides a highly effective combination lock which provides a positive indicator to the user whenever the shackle is in its combination set position.

4. The combination lock defined in claim 2, wherein each of said tumbler sleeves is further defined as being mounted to the long leg of the shackle for rotational movement about the axis of the shackle while being essentially incapable of translational movement along the axis of the long leg of the shackle.

6. The combination lock defined in claim 4, wherein the terminating end portion of the long leg of the shackle is cooperatively associated with the second portal of the elongated bore to assure axial movement relative thereto in response to axial movement of the shackle.

18. The combination lock defined in claim 4, wherein the dial is further defined as comprising a generally cylindrical shape having a plurality of indicia bearing panels on an outer surface thereof for establishing readily identifiable indicia which define elements usable as the combination for defining the release mode of the lock.