DOOR LOCK MECHANISM

Abstract

An improved door lock mechanism is a door locking device having heavy plates that sandwich the door frame above or below the door knob of a door with bolts passing through the plates to secure it to the door frame, and a barrel lock accessible through the outside plate with a barrel key. The locking mechanism is attached to a locking bar on the inside that is attached to a lock shaft rotatable on the door frame side which rotates downward into a slot formed in a plate that is attached to the inside of the door adjacent the frame plates. Together the frame plates, the door plate, and the rotating bar function as a door bar.

Claims

1. An improved door lock mechanism comprising: two plate members; wherein said two plate members are adapted to be located on opposite sides of a door frame and securely bolted together through and to said door frame; at least two bolt members; wherein said at least two bolt members are adapted to pass through said door frame and securely connect said two plate members together and on to said opposite sides of said door frame; a door plate member; wherein said door plate member is adapted to be securely attached to a surface of a door member at a position in proximity to one of said two plate members and adapted to releasably and securely receive a latch member; and a latch member; wherein said latch member is movably attached to said two plate members and is adapted to removably engage with said door plate member; wherein when in use said improved door lock mechanism is adapted to securely and releasably lock a door member in a closed position with respect to a door frame said door member is mounted thereon.

2. The improved door lock mechanism of claim 1, further comprising a lock member located on one of said two plate members that is opposite from said plate member in proximity to said door plate member; wherein said lock member is in mechanically connected to said latch member; and a key member adapted to move said lock member and thereby said latch member into and out of engagement with said door plate member.

3. The improved door lock mechanism of claim 2, wherein said key member is formed as a barrel key adapted to rotate said lock member and thereby move said latch member into and out of engagement with said door plate member.

4. The improved door lock mechanism of claim 2, wherein said key member is formed as a digital keypad adapted to move said lock member and thereby said latch member into and out of engagement with said door plate member.

5. The improved door lock mechanism of claim 1, wherein said door plate member is formed having a main plate portion adapted to be securely attached to a door member, and a latch plate portion extending from said main plate portion and formed having an L-shape, such that said main plate portion and said latch plate portion from a slot adapted to releasably engage said latch member.

6. The improved door lock mechanism of claim 1, wherein said latch member includes a handle portion adapted to allow a person to move said latch member into and out of engagement positions with said door plate member.

7. The improved door lock mechanism of claim 1, further comprising an alarm member adapted to emit an audible signal upon the detection of a person trying to pick said lock or use a counterfeit key member.

8. The improved door lock mechanism of claim 1, further comprising a viewing lens member extending between and through each of said two plate members and is adapted to allow a person on one side of said door member to view someone on the opposite side of said door member.

9. The improved door lock mechanism of claim 1, wherein there are four bolt members.

10. The improved door lock mechanism of claim 1, wherein said two plate members, said at least two bolt members, said door plate member, and said latch member are formed from a material chosen from a group of materials consisting of iron, steel, and ceramic.

11. A combination of a door member, a door frame, and an improved door lock mechanism, said combination comprising: a door member; wherein said a door member is adapted to be pivotally connected to a door frame; a door frame including: two spaced vertical door frame members; and a horizontal door frame member connected between upper end portions of said two spaced vertical door frame members; wherein said door member is pivotally connected to said door frame; and an improved door lock mechanism comprising: two plate members; wherein said two plate members are adapted to be located and secured upon opposite sides of one of said two spaced vertical door frame members of said door frame and securely bolted together through and to said door frame; at least two bolt members; wherein said at least two bolt members are adapted to pass through said one of said two spaced vertical door frame members and securely connect said two plate members together and upon said one of said two spaced vertical door frame members; a door plate member; wherein said door plate member is adapted to be securely attached to a surface of said door member at a position in proximity to one of said two plate members and adapted to releasably and securely receive a latch member; and a latch member; wherein said latch member is movably attached to said two plate members and is adapted to removably engage with said door plate member; wherein when in use said improved door lock mechanism is adapted to securely and releasably lock said door member in a closed position with respect to said door frame.

12. The combination of claim 11, further comprising a lock member located on one of said two plate members that is opposite from said plate member in proximity to said door plate member; wherein said lock member is in mechanically connected to said latch member; and a key member adapted to move said lock member and thereby said latch member into and out of engagement with said door plate member.

13. The improved door lock mechanism of claim 12, wherein said key member is formed as a barrel key adapted to rotate said lock member and thereby move said latch member into and out of engagement with said door plate member.

14. The improved door lock mechanism of claim 12, wherein said key member is formed as a digital keypad adapted to move said lock member and thereby said latch member into and out of engagement with said door plate member.

15. The improved door lock mechanism of claim 11, wherein said door plate member is formed having a main plate portion adapted to be securely attached to said door member, and a latch plate portion extending from said main plate portion and formed having an L-shape, such that said main plate portion and said latch plate portion from a slot adapted to releasably engage said latch member.

16. The improved door lock mechanism of claim 11, wherein said latch member includes a handle portion adapted to allow a person to move said latch member into and out of engagement positions with said door plate member.

17. The improved door lock mechanism of claim 11, further comprising an alarm member adapted to emit an audible signal upon the detection of a person trying to pick said lock or use a counterfeit key member.

18. The improved door lock mechanism of claim 11, further comprising a viewing lens member extending between and through each of said two plate members, is adapted to pass through said door frame, and is adapted to allow a person on one side of said door member to view someone on the opposite side of said door member.

19. The improved door lock mechanism of claim 11, wherein there are four bolt members.

20. The improved door lock mechanism of claim 11, wherein said two plate members, said at least two bolt members, said door plate member, and said latch member are formed from a material chosen from a group of materials consisting of iron, steel, and ceramic.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The figures which accompany the written portion of this specification illustrate embodiments and method(s) of use for the present invention, improved door lock mechanism, constructed and operative according to the teachings of the present invention.

[0020] FIG. 1 shows a perspective view illustrating an improved door lock mechanism according to an embodiment of the present invention.

[0021] FIG. 2 is a perspective view illustrating the inside portion of the improved door lock mechanism according to an embodiment of the present invention of FIG. 1.

[0022] FIG. 3A is a perspective view illustrating the outside portion of a keyed embodiment of the improved door lock mechanism according to an embodiment of the present invention of FIG. 1.

[0023] FIG. 3B is a perspective view illustrating the outside portion of a keypad embodiment of the improved door lock mechanism according to an embodiment of the present invention of FIG. 1.

[0024] The various embodiments of the present invention will hereinafter be described in conjunction with the appended drawings, wherein like designations denote like elements.

DETAILED DESCRIPTION

[0025] As discussed above, embodiments of the present invention relate to a door lock and more particularly to a an improved door lock mechanism as used to increase difficulty in lock picking while reinforcing the door.

[0026] Generally speaking, an improved door lock mechanism is a door locking device having heavy plates that sandwich the door frame above or below the door knob of a door with bolts passing through the plates to secure it to the door frame, and a barrel lock accessible through the outside plate with a barrel key. The locking mechanism is attached to a locking bar on the inside that is attached to a lock shaft rotatable on the door frame side which rotates downward into a slot formed in a plate that is attached to the inside of the door adjacent the frame plates. Together the frame plates, the door plate, and the rotating bar function as a door bar.

[0027] In greater detail now, referring to the drawings by numerals of reference there is shown in FIG. 1, a perspective view illustrating improved door lock mechanism 100 according to an embodiment of the present invention.

[0028] Improved door lock mechanism 100 preferably comprises two plate members 105 adapted to be located on opposite sides of door frame 106 and securely bolted together through door frame 106, at least two bolt members 110 adapted to pass through door frame 106 and securely connect the two plate members 105 together from opposite sides of door frame 106, door plate member 115 adapted to be securely attached to the surface of door member 155 at a position in proximity to one of the two plate members 105 and adapted to releasably and securely receive latch member 120.

[0029] Latch member 120 movably attaches to the two plate members 105 and is adapted to removably engage with door plate member 115 such that improved door lock mechanism 100 is adapted to securely and releasably lock door member 155 in a closed position with respect to door frame 106 that door member 155 is mounted upon. Lock member 125 is located on one of the two plate members 105 that is opposite from plate member 105 and in proximity to door plate member 115. Lock member 125 is mechanically connected to latch member 120 key member 126 is adapted to move lock member 125 and thereby latch member 120 into and out of engagement with door plate member 115.

[0030] Referring now to FIG. 2, is a perspective view illustrating the inside portion of improved door lock mechanism 100 according to an embodiment of the present invention of FIG. 1.

[0031] Door plate member 115 is formed having main plate portion 135 adapted to be securely attached to door member 155, and latch plate portion 140 extending from main plate portion 135 and formed having an L-shape such that main plate portion 135 and latch plate portion 140 form a slot adapted to releasably engage latch member 120. Latch member 120 includes handle portion 141 adapted to allow a person to move latch member 120 into and out of engagement positions with door plate member 115. Alarm member 145 may be adapted to emit an audible signal upon the detection of a person trying to pick lock member 125 or use a counterfeit key member. Alarm member 145 is optional and improved door lock mechanism 100 may be manufactured without this option. Viewing lens member 150 extends between and through each of the two plate members 105 and is adapted to allow a person on one side of door member 155 to view someone on the opposite side of door member 155. Viewing lens member 150 is optional and improved door lock mechanism 100 may be manufactured without this option.

[0032] There may be four bolt members 110 used to connect the two plate members 105 and sandwich the inner and outer surfaces of door frame 106, with bolt members 110 passing through holes in door frame 106 to secure plate members 105 into position. The two plate members 105, bolt members 110, door plate member 115, and latch member 120 are formed from a material chosen from a group of materials consisting of iron, steel, and ceramic.

[0033] Referring now to FIG. 3A, is a perspective view illustrating the outside portion of a keyed embodiment of improved door lock mechanism 100 according to an embodiment of the present invention of FIG. 1.

[0034] Key member 126 is formed as barrel key 127 adapted to rotate lock member 125 and thereby move latch member 120 into and out of engagement with door plate member 115. Key member 126 is formed as barrel key 127 adapted to rotate lock member 125 and thereby move latch member 120 into and out of engagement with door plate member 115. Key member 126, in some embodiments, may be formed as digital keypad 128 adapted to move lock member 125 and thereby latch member 120 into and out of engagement with door plate member 115.

[0035] The invention may comprise the combination of door member 155, door frame 106, and improved door lock mechanism 100 with door member 155 adapted to be pivotally connected to door frame 106. Door frame 106 includes two spaced vertical door frame member107 and horizontal door frame member 108 connected between upper end portions 109 of the two spaced vertical door frame member107, and with door member 155 pivotally connected to door frame 106. Improved door lock mechanism 100 preferably comprises two plate members 105 adapted to be located and secured upon opposite sides of one of the two spaced vertical door frame members 107 of door frame 106 and securely bolted together through and to door frame 106. At least two bolt members 110 are adapted to pass through one of the two spaced vertical door frame member107 and securely connect the two plate members 105 together upon one of the two spaced vertical door frame member107. Door plate member 115 is adapted to be securely attached to the surface of door member 155 at a position in proximity to one of the two plate members 105 and adapted to releasably and securely receive latch member 120. Latch member 120 is movably attached to the two plate members 105 and is adapted to removably engage with door plate member 115.

[0036] Door plate member 115 is formed having main plate portion 135 adapted to be securely attached to door member 155, and latch plate portion 140 extending from main plate portion 135 and formed having an L-shape, such that main plate portion 135 and latch plate portion 140 form slot 160 adapted to releasably engage latch member 120. Latch member 120 includes handle portion 141 adapted to allow a person to move latch member 120 into and out of engagement positions with door plate member 115 manually. Alarm member 145 is adapted to emit an audible signal when there is a detection of a person trying to pick lock member 125 or use a counterfeit key member 126. Viewing lens member 150 extends between and through each of the two plate members 105 and is adapted to pass through door frame 106 to allow a person on one side of door member 155 to view someone on the opposite side of door member 155.

[0037] Referring now to FIG. 3B, showing a perspective view illustrating the outside portion of a keypad embodiment of improved door lock mechanism 100 according to an embodiment of the present invention of FIG. 1.

[0038] Key member 126 may be formed as digital keypad 128 in some embodiments and adapted to move lock member 125 and thereby latch member 120 into and out of engagement with door plate member 115. When in use, improved door lock mechanism 100 is adapted to securely and releasably lock door member 155 in a closed position with respect to door frame 106. Lock member 125 is located on one of the two plate members 105 that is opposite from plate member 105 in proximity to door plate member 115 and is connected to latch member 120. Key member 126 is adapted to move lock member 125 and thereby latch member 120 into and out of engagement with door plate member 115.

[0039] There may be four bolt members 110 used to connect the two plate members 105 and sandwich the inner and outer surfaces of door frame 106, with bolt members 110 passing through holes in door frame 106 to secure plate members 105 into position. The two plate members 105, bolt members 110, door plate member 115, and latch member 120 are all formed from a material chosen from a group of materials consisting of iron, steel, and ceramic.

[0040] The improved door lock mechanism 100 may be manufactured and provided for sale in a wide variety of sizes and shapes for a wide assortment of applications. Upon reading this specification, it should be appreciated that, under appropriate circumstances, considering such issues as design preference, user preferences, marketing preferences, cost, structural requirements, available materials, technological advances, etc., specific assembly contents or arrangements such as, for example, including more or less components, customized parts, different color combinations, parts may be sold separately, etc., may be sufficient.

[0041] The embodiments of the invention described herein are exemplary and numerous modifications, variations and rearrangements can be readily envisioned to achieve substantially equivalent results, all of which are intended to be embraced within the spirit and scope of the invention. Further, the purpose of the foregoing abstract is to enable the U.S. Patent and Trademark Office and the public generally, and especially the scientist, engineers and practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a cursory inspection the nature and essence of the technical disclosure of the application.