Patent Application
20190071893
The present invention pertains to a high security cylinder lock that prevents the use of well knowing systems to open the cylinders of the locks, only to mention the most knowing as lock picking and bumping. This invention is an improvement to current cylinders locks in the market, and more specifically, this invention is used to increase the security in the cylinders used in locks fitted in doors, padlocks and any device where the security device to open a lock is based on the cylinder lock fitted in the lock.
Current cylinders have limited security in opening locks of houses, padlocks and similar security devices. Just to name only few of ways of non-authorized entry, there are lock picking, bumping, bumping with elastic device, all of which have been proven to be very effective in opening in a very short time the cylinders. These methods operate with particular picking tools that put the plug of the cylinder in tension and then proceed, once the plug is in tension, to lift the pins until a certain height in order that the line of separation between the adjacent pins is in the area of division between the body of the cylinder and the plug rotatable of the cylinder. In this way, when all the pins have been lifted in the abovementioned area, the plug can rotate and consequently open the lock. In the actual cylinder lock, there is a necessity to not allow non-authorized persons to put the internal plug in tension in order to allow the plug to move and consequently open the lock
U.S. Pat. No. 4,723,427 has a side bar which is symmetrical with regard to a radius through a center of the key plug perpendicular to the plane of the key so that the side bar intersects not only slots in the twisting tumblers, but the profile of the key. U.S. Pat. No. 4,723,427 does not have a sliding device
U.S. Pat. No. 5,819,566 is a cylinder lock is provided with a resiliently biased auxiliary locking pin which projects into the keyway and then retracts the locking pin into the shell. The device of U.S. Pat. No. 5,819,566 does not have a sliding component
U.S. Pat. No. 5,823,030 discloses a key having profile features which include a shaped indentation on a first side of the blade and an aligned projection on the opposite side of the blade cooperates with a cylinder lock with unauthorized key trapping capability.
U.S. Pat. No. 6,526,791 uses a flexible coupling connected between the locking pin and the sensor pin, the coupling moving the locking pin to the unlocked position when the sensor pin moves to the retracted position to provide additional security.
U.S. Pat. No. 6,959,570 design employs multiple arrays of pass key pins to make picking the lock more difficult but doesn't utilizing sliding components.
U.S. Ser. No. 12/413,139 is a tumbler pin lock that includes an auxiliary locking mechanism including an auxiliary locking pin to provide enhance locking in addition to the tumbler pins. Part of the claim states “an auxiliary locking pin disposed within said cylindrical plug and moveable between a first position in which a portion of said auxiliary locking pin extends out of a hole formed in an outer wall of said cylindrical plug and a second position in which said auxiliary locking pin is retracted into said hole.”
This patent is closest to the invention presented in that it has, in addition to the pin and tumbler system, a locking pin that needs to be moved in order for the lock to open. U.S. patent Ser. No. 12/413,139 retracts the pin, while the invention disclosed in this application moves the sliding mechanism (mobile device) forward so that a projection on the mobile device an turn in a groove when the key is turned. The second embodiment of the invention disclosed in this application adds a second somewhat square blocking device which also needs to be moved to turn in a groove, for triple protection which U.S. Ser. No. 12/413,139 does not have.
This invention first embodiment takes a standard type pin and tumbler cylinder lock and adds new features: sliding mobile devices, which holds the pins rather than the plug, which are small mostly rectangular blocks, with interior slots on the inside of the mobile devices to accept the key. A small projection on each mobile device having a small projection in a predetermined position; blocking posts that protrudes from the shell to stop the mobile device from turning more than a small distance, and an annular groove in an inner housing shell which allows the mobile device' projection to rotate when the proper key is inserted. The key first aligns with the pins to create a shear line. Then the key pushes the mobile device forward and pin and projection line up with the annular grooves which allows the plug to turn. This is a second defense, the first being the pin and tumbler system, against picking as the mobile devices can only go forward, and not turn, blocked by posts, in the case of attempted unauthorized entry through picking or other means.
This invention second embodiment adds a third line of defense against unauthorized entry through picking or other means. A second blocking (152 in
The following items are for the second embodiment from
The solution offered in this application has the pins that normally were moving up and down in the plug, moving up and down in a mobile device that slides in the plug, and these pins, separate at the shear line when the correct key is used. The mobile device has a projection on top that contacts blocking pins (in the grooves where the projection will slide) from the housing to minimize turning without the proper key inserted, when the mobile device slides forward after the correct key is inserted, the pins are at a shear line, and the projection can rotate in the groove in the inner housing shell that doesn't have blocking pins allowing the plug to rotate.
Has the elements of the first embodiment, but adds a second mobile device component near the back of the plug (away from the key entering point) which blocks the plug turning unless it is moved axial to the back of the plug where a post on the second mobile device component enters a groove which will enable rotation.
The preferred embodiment is operable by a single key. In
For the sake of brevity in description, in this embodiment the number of mobile devices 5 was limited to four, and said pins, tumbler pins and springs are not described in detail, since they are fully conventional in terms of shape and operation. The cylinder that is object of this idea is composed of several basic components: The shell 3 that is the outer casing where inside of it there is a plug 4, rotatable in the shell, and where the shell is provided with several holes 34 where the spring 53 and the pins 51 and 52 move. The plug 4 has a keyway 41, the slot where the key goes in, and is provided with holes 44
Present in the upper part there are one or more holes 57 (
Referring to
The key 1 is provided with several blades 14 and each of them could present different shapes and is operatively adapted to be inserted through an opening or keyway 41 in the front face 42 of the plug 4 and through the inferior groove 58 of device 5. The blades of the key are provided with teeth 16 in the front part of the key blades 14. A connecting post 37 extends from the radial mounting hole 36 of the shell 1 into the annular groove 46 of the plug 4 to rotatably secure the plug 4 to the shell 3. The way in which the key works is the following: when inserting the key 1 in the keyway 41 and proceeding until the end, the various profiles 16 of the first part of the key 1 enter into the grooves 58 of mobile devices 5 and pushes the pairs of pins 51 and 52 up, so that the top pins no longer are located in mobile device 5 and the bottom of them are up at the interior edge of the housing shell creating a shear line between the plug and the shell. Contemporary when all the pins 51 and 52 have been up in the right position, the surface 13 of key 1 gets in contact with the surface of the first interior pin that it encounters (counting from the keyway). In this configuration the mobile devices 5 are free to slide longitudinally in the plug grooves 45.
Continuing to proceed with the key the area 13 of the key gets in contact with the surface of the blocking pin 51, the key 1 will move the pin longitudinally in the groove 45, and consequently the mobile device 5 in which the pin is fitted, until a position in which the corresponding annular grooves 27 will allow the part 56 to pass in said groove. This activity causes the tumblers segments, 51 and 52, to separate and the tumbler 51 engage the key 1 with the mobile device 5, thereby preventing uprooting of the key 1. If the projected part 56 in the mobile device 5 enter in the right annular groove 27 (groove without the block 22), the plug would be allowed to rotate completely and open the cylinder. If the part 56 enter in a groove with the block 22, the plug would be allowed to rotate for some degrees and then will be obstructed by the block 22, and consequently the plug will not rotate leaving the lock locked. The key in this embodiment has four blades 14 and four mobile devices 5 but the number of blades 14 could be more depending on the number of longitudinal groves 45 fitted in the plug. The mobile devices 5 could have one or more holes 57 and the mobile devices 5 could be one or more in each groove 45. The configuration of the projection on the mobile device 56 is presented flat but could be curved or any shape depending of the design. This kinematic of the mobile devices, not allowing to put the plug in a circular tension, is obliging the non-authorized person that is willing to open the cylinder without the relative correspondent key, to proceed in a way much more complicate with respect of the actual cylinders, increasing in this way the security offered by this type of cylinder lock. This means that the operation should be made with multiple picks with in the lock so the probability of picking the lock becomes minuscule because it will be practically unmanageable to manipulate more pick tools at once. Such a cylinder lock would further be adaptable to a variety of lock doors, padlocks and similar actual in the market, and would be made with a minimal number of internal parts, in the most convenient material, each of which are relatively easy to produce to reduce cost. The preferred embodiment thus offers two locking sections operable by a single key. The drawings do not show the (conventional rotatable) mechanism regarding the bolt connected to the cylinder. These details of construction have not been illustrated since, they can be made in any known way, and they do not fail within the scope of the invention.
In a second preferred embodiment that is illustrated with all the elements unassembled in
The inner housing shell 2 has been eliminated in this embodiment with the annular grooves now in the shell 3.
The way in which the key works in this embodiment is as follows: inserting the key 100 in the keyway 141 and proceeding, the area 106 of the key gets engaged with the surface 159 of the second locking component 152 and start to move it in the direction of the rear part of the cylinder meanwhile the teeth 102 in the blade 101 start to up the pins 51 and 52 until all the bottom of the superior pins is out of the hole in the plug and contemporary the surface 105 of the key gets in contact with the surface of the first interior pin (counting from the front). In this situation, and proceeding the key entering, the device 150 starts to move until a predefined position where the post 153 of the second mobile device 152 is placed in front of the right annular groove 135 (
62/553,216—Provisional patent application Filing date Jul. 17, 2017
| Number | Date | Country | |
|---|---|---|---|
| 62553216 | Sep 2017 | US |
