Source: http://www.google.com/patents/US7441425?dq=6,460,050
Timestamp: 2016-05-29 14:10:00
Document Index: 286573706

Matched Legal Cases: ['art 50', 'art 50', 'art 50', 'art 50', 'art 50', 'art 50', 'art 50', 'art 50']

Patent US7441425 - Door lock of cargo container having burglarproof function - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsAn improved door lock of a cargo container having a burglarproof function is disclosed. The door lock includes a handle hub, in which supporting pieces are integrally formed, welded to a locking rod, a rear supporting piece of the supporting pieces having a fastening hole, a front supporting piece of...http://www.google.com/patents/US7441425?utm_source=gb-gplus-sharePatent US7441425 - Door lock of cargo container having burglarproof functionAdvanced Patent SearchPublication numberUS7441425 B2Publication typeGrantApplication numberUS 11/806,627Publication dateOct 28, 2008Filing dateJun 1, 2007Priority dateSep 28, 2006Fee statusLapsedAlso published asUS20080078222Publication number11806627, 806627, US 7441425 B2, US 7441425B2, US-B2-7441425, US7441425 B2, US7441425B2InventorsKum-Sik JeongOriginal AssigneeKum-Sik JeongExport CitationBiBTeX, EndNote, RefManPatent Citations (12), Referenced by (11), Classifications (33), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetDoor lock of cargo container having burglarproof function
US 7441425 B2Abstract
1. A door lock of a cargo container having a burglarproof function comprising:
a handle hub, in which a pair of supporting pieces is integrally formed, welded to a side of a locking rod;
a rear supporting piece of the supporting pieces having a fastening hole;
a front supporting piece of the supporting pieces integrally formed with an inward locking protrusion having a screw coupling groove;
a handle including a connecting part formed at a side thereof and having a locking recess with a fastening hole such that the inward locking protrusion of the front supporting piece is inserted into and locked in the locking recess due to pivot of the handle; and
a bolt fastened into the screw coupling groove through the fastening hole of the rear supporting piece.
7. The door lock of a cargo container having a burglarproof function according to claim 1, further comprising a fixing plate installed to a door of the cargo container,
wherein the handle, in which the connecting part is fastened to the handle hub by the bolt, is locked by a locking piece and a catch of the fixing plate, and
the catch has a thickness of 5 mm to 10 mm and is made of a high carbon steel.
8. A door lock of a cargo container having a burglarproof function comprising:
a handle pivotally connected to the handle hub,
a handle locking device having a locking protrusion integrally formed in one of the pair of supporting pieces, the locking protrusion having a locking groove formed therein, and a connecting part formed at a side of the handle such that the connecting part of the handle is inserted between the pair of supporting pieces to allow the handle to pivot to be locked; and
a locking piece formed on a fixing plate fixed to a door to lock an opposite side of the handle when the handle is locked. Description
In more detail, the handle hub 20 of the present invention, as illustrated in FIGS. 3 and 4, is configured in a way that a tungsten carbide plate of high carbon steel having a predetermined thickness is bent to have a U-shape by a forging press such that a pair of supporting pieces 30 a and 30 b, which face each other and are integrally formed with each other, is formed and an insertion portion 32 is defined therebetween.
A rear supporting piece 30 b of the pair of supporting pieces 30 a and 30 b of the handle hub 20 has a fastening hole 34 formed in the central portion thereof, and a front supporting piece 30 a includes an inward locking protrusion 38 having a screw coupling groove 36 formed at the rear central portion. A protrusion 40 is integrally with the front portion of the front supporting piece 30 a. On the other hand, the handle 22 coupled with the handle hub 20, as illustrated in FIG. 5, has a locking recess 51 formed in the connecting part 50 and having a fastening hole 52 such that the inner locking protrusion 38 of the front supporting piece 30 a of the handle hub 20 is inserted into the locking recess 51.
The fastening hole 34 and the screw coupling groove 36 of the supporting pieces 30 a and 30 b of the handle hub 20 are provided for the fastening of the bolt 42 when the handle 22 is coupled with the handle hub 20. The inner locking protrusion 38, as illustrated in FIG. 5, is provided to serve as a lock when the inner locking protrusion 38 is inserted into the locking recess 51 of the connecting part 50 of the handle 22 and the handle 22 is pivoted.
When the handle 22 is inserted into the handle hub 20 and is pivoted, the handle 22 is locked and fixed by the handle hub 20 and the bolt 42 fastened at the rear side of the handle hub 20 is not exposed over the front side of the handle hub 20 after the bolt 42 is fastened. Particularly, the protrusion 40 formed at the front central portion of the front supporting piece 30 a is provided such that a thief cannot perforate the front supporting piece 30 a with a cutting machine such as a drilling machine and the handle hub 20 is made of a tungsten carbide plate of high carbon steel so that it is next to impossible for the thief to perforate with the cutting machine such as the drilling machine.
In the embodiment of the present invention, the protrusion 40 integrally formed with the front central portion of the front supporting piece 30 a of the handle hub 30, as illustrated in FIG. 3, may be formed on the front supporting piece 30 a in the form of a dome shape, or, as illustrated in FIG. 9, on the front supporting piece 30 a in the form of a curved cone shape. Moreover, the protrusion 40 may be protruded from the front supporting piece 30 a in the form of a plate having the same size as the front supporting piece 30 a as illustrated in FIG. 10.
When coupling the handle 22 with the handle hub 20, firstly the handle 22 is vertically erected, the connecting part 50 of the side of the handle 22 is inserted into the insertion portion 32 of the handle hub 20 such that the inner locking protrusion 38 of the front supporting piece 30 a is inserted into the locking recess 51 of the connecting part 50. By doing so, the fastening hole 52 of the connecting part 50 is naturally aligned with the fastening hole 34 of the rear supporting piece 30 b. In this state, as illustrated in FIG. 5, the bolt 42 is inserted into the fastening hole 34 of the rear supporting piece 30 b from the rear side of the handle hub 20 and is fastened into the screw coupling groove 36 of the front supporting piece 30 a. Moreover, if necessary, a head of the bolt 42 is welded in a recess in which the head of the bolt 42 is placed such that the bolt 42 is welded to the rear supporting piece 30 b. As described above, after the handle 22 is coupled, the handle 22 is pivoted toward the door 10 about the locking rod 12 to contact the door 10 and the handle 22 vertically hung is pivoted up counterclockwise, as illustrated in FIG. 7, to be locked by the locking piece 62 of the fixing plate 60 fixed to the outer surface of the door 10. Next, the catch 64 is so pivoted that the central portion of the handle 22 is locked by the locking piece 62 and the catch 64 of the fixing plate 60.
The fastened and locked state of the handle 22 to the handle hub 20 and by the fixing plate 60 can be clearly understood with reference to FIGS. 6 to 8. In other words, since the locking recess 51 formed at the connecting part 50 of the handle 22 is downwardly opened, although the bolt 42 of the handle hub 20 is perforated or cut off, the inward locking protrusion 38 of the front supporting piece 30 a is still locked by the locking recess 51. Thus, a thief cannot detach the handle 22 from the handle hub 20 without releasing the container seal 70.
Although, in the preferred embodiment of the present invention, the inward locking protrusion 38 is formed in the handle hub 20 in which a pair of supporting pieces 30 a and 30 b are integrally formed with each other and the locking recess 51 is formed in the connecting part 50 of the handle 22 such that the handle 22 is inserted into the handle hub 20 and pivots to be locked by the handle hub 20, on the contrary, it is possible that the locking recess 51 is formed in the handle hub 20 and the inward locking protrusion is formed in the connecting part 50 of the handle 22. Moreover, although the fastening hole 34 and the screw coupling groove 36 are formed in the handle hub 20 to couple the bolt 42, those skilled in the art appreciate that the handle hub 20 can be configured without the bolt 42, the fastening hole 34, and the screw coupling groove 36.
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