A spring fatigue apparatus for springs used in firearm systems
A universal spring fatigue apparatus with adjustable elements and interchangeable fastening blocks addresses the limitations of multiple devices by enabling efficient testing of diverse spring types in firearms, optimizing production efficiency and cost.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SAMSUN YURT SAVUNMA SANAYI VE TICARET AS
- Filing Date
- 2026-01-15
- Publication Date
- 2026-07-23
AI Technical Summary
Existing spring fatigue testing devices are limited to specific types of springs and require multiple apparatuses for different spring types used in firearms, leading to inefficiencies in time, cost, and space usage in production facilities.
A universal spring fatigue apparatus with interchangeable fastening blocks and adjustable LI and L2 elements allows testing of various spring types by categorizing them into four groups based on LI and L2 measurements, enabling a single apparatus to perform all necessary tests.
This solution reduces the need for multiple testing devices, saving time, cost, and space by allowing a single apparatus to accommodate different spring types, ensuring efficient and accurate fatigue testing across firearms production.
Smart Images
Figure TR2026050030_23072026_PF_FP_ABST
Abstract
Description
[0001] DESCRIPTION
[0002] A SPRING FATIGUE APPARATUS FOR SPRINGS USED IN FIREARM SYSTEMS
[0003] Technical Field
[0004] The invention relates to a universal spring fatigue apparatus used to perform all of the spring fatigue tests of different spring types used in firearms.
[0005] State of the Art
[0006] The lengths of the springs are usually defined for two different situations, such as LI and L2. These lengths vary depending on the forces on the spring.
[0007] Spring Lengths
[0008] L0: It is the length of the spring when it is not under any force, that is, when it is idle.
[0009] LI: It is the length obtained when the spring extends under the force FL In this case, the spring extends by a certain amount of extension (stroke).
[0010] L2: It is the length that the spring reaches when it extends under the force F2. This is defined by another amount of extension.
[0011] There is a correlation between these lengths of the springs. For example, the lengths LI and L2 are directly proportional to the forces applied on the spring, and this is evaluated according to Hooke's Law.
[0012] These lengths are critical to the design and application of springs and may vary for different materials and designs.
[0013] The spring fatigue apparatus is a device used to test the fatigue strength of the springs and to evaluate their performance. Such devices are designed to measure how the springs behave under the influence of the loads they are exposed to for a certain period of time. These tests are critical to predict the life of the springs.There are various designs and sizes of fatigue testing devices suitable for different spring types. These devices are used to check the quality and performance of the springs.
[0014] The spring fatigue testing devices usually include a test chamber, in which springs are placed, and experiments are carried out. The design of the device allows accurate testing of the springs.
[0015] Modern fatigue testing apparatus can precisely measure the mechanical properties of springs, providing high accuracy and high repeatability. These properties are especially important for ensuring quality assurance in production processes.
[0016] Spring fatigue apparatus play a critical role in engineering and material science to evaluate the durability of springs.
[0017] In the firearms industry, springs are critical to various functions and applications. These springs are used to improve the performance and reliability of firearms.
[0018] The use of springs in firearms is fairly common and is found in almost all types of firearms. In particular, different types of springs are used in various types of weapons such as pistols, rifles, and hunting rifles. Examples of the use of springs within firearms are presented below.
[0019] • Firing Mechanism:
[0020] The springs play an important role in the firing mechanisms in firearms. They are especially used in trigger mechanisms and firing pin springs. These springs allow the needle to be withdrawn and pushed forward during fire.
[0021] • Magazine Mechanism:
[0022] The magazine spring allows the bullets to be pushed from the magazine to the chamber. This spring plays a critical role in ensuring that the bullets are fed continuously.
[0023] Shock Absorbing Systems:The springs are also used in shock-absorbing systems to reduce the recoil of firearms. This not only increases user comfort but also extends the life of the weapon.
[0024] Trigger Return:
[0025] The springs used in the trigger mechanisms allow the trigger to return when the trigger is released, which helps to ensure proper firing.
[0026] • Targeting and Stability:
[0027] In some firearm designs, springs are used in targeting systems or to increase stability.
[0028] The durability and fatigue life of springs are critical in these applications, which is why weapon manufacturers often prefer to use specially designed springs made from high-quality materials.
[0029] Since different types of springs are used for various functions in the firearms industry, the spring fatigue apparatus used to test these springs may also differ.
[0030] The springs used in firearms include different types such as trigger springs, magazine springs, and recoil springs. Each of these springs has different mechanical properties and loading conditions. Therefore, special tests are required for each type of spring. For this reason, the spring fatigue apparatus included in the current art is designed to be used only for testing certain springs.
[0031] The necessity of using springs with different structures and features even for a single weapon requires that the manufacturer has more than one spring fatigue apparatus in the production facility, even for a single weapon. If the manufacturer has a facility that produces more than one firearm, a large number of spring fatigue apparatus to be used for these weapons should be available within the facility.
[0032] Patent application CN220304978 (U) discloses a horizontal tension testing device for U-shaped springs. This patent defines a testing device developed to evaluate the performance of U-shaped springs under tension.The apparatus subject to the application has been specially designed to determine the mechanical properties of U-shaped springs. Since it is not possible to use this spring fatigue apparatus for different springs, a solution that contributes to the solution of the above-mentioned technical problems could not be created.
[0033] Problems to be solved by the Invention
[0034] The invention aims to provide a universal spring fatigue apparatus for performing spring fatigue tests of different types of springs used in firearms.
[0035] With the spring fatigue apparatus created, it has been possible to perform fatigue testing of springs that produce different weapons and have different features within these weapons.
[0036] The different springs used in this type of production facility are divided into different categories by taking into account the Li and L2 measurements, and the fatigue testing processes of all springs can be carried out with a single apparatus by making the necessary adjustments with the measurement adjustment systems on the apparatus.
[0037] In this way, the use of more than one apparatus for the fatigue testing process can be prevented and saving both time and cost can be obtained.
[0038] With this universal apparatus created, the manufacturer will not have to have a large number of apparatus in the production facility to fatigue different springs. In this way, the need to have additional machines in the production facility will be eliminated and savings can be made in terms of space.
[0039] Description of the Figures
[0040] Figure 1. A perspective view of one of the fastening blocks of the spring fatigue apparatus one block assembled and others disassembled
[0041] Figure 2. A separate view of the moving support part and the fixed support part with the fastening block mounted
[0042] Figure 3. An exploded view of the fastening block with springsFigure 4. A close-up view of the spring fatigue apparatus with the fastening block disassembled
[0043] Description of References in Figures
[0044] 1. Apparatus body
[0045] 2. Tensioning element
[0046] 3. Transmission element
[0047] 4. Fastening block
[0048] 4.1. Movable fastening block
[0049] 4.2. Fixed fastening block
[0050] 4.3. Connection projection
[0051] 4.4. Pin
[0052] 4.5. Pin slot
[0053] 5. LI adjustment element
[0054] 6. Adjustment indicator
[0055] 7. Movement track
[0056] 8. Fixed support part
[0057] 9. Movable support part
[0058] 10. L2 adjustment element
[0059] 11. Spring
[0060] 12. Connection groove
[0061] 13. Adjustment removal pin slot
[0062] 14. Adjustment removal pin
[0063] 15. Moving body
[0064] Description of the Invention
[0065] The invention relates to a universal spring fatigue apparatus used to perform all of the spring fatigue tests of different spring types used in firearms.
[0066] The spring fatigue apparatus comprises at least one apparatus body (1) associated with it for tensioning at least one spring (11) and equipped with at least one tensioning element (2).The apparatus body (1) comprises at least one fastening block (4) that can be used to fatigue the springs (11) of different characteristics and has connection areas in its structure where at least one spring (11) can be positioned and can be connected to the apparatus body (1) or one or more of the parts associated with it in a detachable way.
[0067] In order for the springs (11) of different structures to be subjected to fatigue test, ready-made fastening apparatuses (4) of different structures prepared in advance can be used, as well as fastening blocks (4) that may be suitable for different springs (11) can be formed by disassembling and assembling the lower parts of the apparatus relative to each other and / or adjusting them accordingly.
[0068] Within the preferred embodiment of the invention, the movable and fixed fastening blocks (4.1, 4.2) are configured to be interchangeably positioned without limitation. The fastening block (4) of the desired structure can be formed by attaching the block (4.1, 4.2) to the moving side of the block (4.1, 4.2).
[0069] According to Figure 1, the fastening blocks (4) are removably connected between at least one fixed support part (8) and at least one movable support part (9).
[0070] In this embodiment, the movable support part (9) is associated with the L2 adjustment element (10) by means of at least one transmission element (3). The L2 adjustment element (10) is the adjustment unit used to adjust the L2 length of the spring (11) to be fatigued.
[0071] In the preferred embodiment of the invention, the L2 adjustment element (10) is provided with an adjustment indicator (6) showing the L2 value of the spring to be fatigued.
[0072] Again, the fixed support part (8) is associated with at least one LI adjustment element (5). The LI adjustment element (5) is the adjustment unit used to adjust the LI length of the spring (11) to be fatigued.
[0073] The fixed support part (8) is positioned in a movement track (7) according to Figure 1. The perimeter of the movement track (7) is equipped with an adjustment indicator (6). In this way, the function provided by the LI adjustment element (5) for the adjustment of the LI value can be shown to the user by this adjustment indicator (6).Figure 3 shows the fastening block (4) of one of the preferred embodiments of the invention. Within this application, the fastening block (4) comprises at least one movable fastening block (4.1) and at least one fixed fastening block (4.2), between which at least one pin (4.4) is formed.
[0074] Within this embodiment, the pins (4.4) aim to carry the springs (11). Each pin (4.4) carrying the springs (11) aims to be connected to the pin slots (4.5) formed on the movable fastening block (4.1) and the fixed fastening block (4.2).
[0075] According to Figure 3, the end of the pins (4.4) on the side of the fixed fastening block (4.2) is made available so that they can be connected to the pin slots (4.5) formed in this section. On the other side (movable fastening block (4.1) side), the end is tapered.
[0076] According to Figure 3, the movable fastening block (4.1), and the back part of the fixed fastening block (4.2) (the side not associated with the pins (4.4)) are provided with at least one connection projection (4.3).
[0077] The connection projection (4.3) aims to be placed in the connection groove(s) (12) formed on the fixed support part (8) and the movable support part (9). Thanks to the relationship between the connection projection (4.3) and the connection groove (12), the fastening block (4) can be removably associated with the apparatus body (1).
[0078] According to the preferred embodiment of the invention, the connection projection (4.3) is designed as a long part with a T-section. This T-section part aims to be placed in the connection groove (12), which is also configured as a T-section channel.
[0079] At least one of the parts (8, 9) is provided with the adjustment removal pin (14) so that the parts of the fastening block (4) can be removed and attached to the fixed support part (8) and the movable support part (9). According to Figure 2 showing the preferred embodiment of the invention, both parts (8, 9) are equipped with an adjustment removal pin (14). The adjustment removal pin (14) is operated in the adjustment removal pin slot (13). According to Figure 2, both the movable support part (8) and the fixed support part (9) are also provided with the adjustment removal pin (14).Within the scope of the preferred embodiment of the invention, 16 different springs are divided into 4 categories by taking into account the Li and L2 measurements. By making the necessary adjustments with the measurement adjustment systems on the apparatus, the fatigue processes of all springs (11) used during the production of firearms can be carried out with only a single spring fatigue apparatus.
[0080] The values of the arc measurements in terms of firearms are presented below.
[0081] LO: Normal Length of Spring
[0082] LI : Length of the spring when placed on the firearm
[0083] L2: Fatigue length of the spring when retracting the firearm slide
[0084] According to Figure 3 showing the preferred embodiment of the invention, the pin (4.4) removed from the fastening blocks (4) is designed to vary according to the lengths of LI and L2 and to be able to attach at least 1 and at most 6 springs (11) at a time.
[0085] The appropriate fastening block is selected for the spring to be fatigued. It is then attached to the fixed and movable support parts.
[0086] At least 1 and at most 6 springs (11) to be fatigued are placed on the pins (4.4) as shown in Figure 3.
[0087] According to Figure 1, the LI adjustment element (5) is designed in the form of a rotatable arm. Within the different applications of the invention, the arm can be operated manually or motorized. This arm is turned clockwise, and the fixed support part (8) is pushed forward. In this way, the spring (11) is compressed and the LI length is selected and adjusted to correspond to the spring model to be fatigued in the LI adjustment element (5) indicator.
[0088] In the L2 length adjustment; the region suitable for the spring model to be fatigued is selected over the L2 adjustment element (10). In this way, the L2 length is adjusted.
[0089] Within the preferred embodiment of the invention, the arm directly pushes the moving body (15) forward.Within the preferred embodiment of the invention, the pins (4.4) formed in different sizes and diameters can be connected to the fastening blocks (4) and the fastening blocks (4) required for different spring (11) needs can be formed. By separating the fastening blocks (4) from the apparatus body (1), the user will be able to change the pins (4.4) and use the apparatus for different spring (11) preferences.
[0090] For the replacement process of the pin (4.4), the fastening blocks (4) can be separated directly from the apparatus body (1) or can change the pins (4.4) by separating the fastening blocks (4.1-4.2) to which the pins (4.4) are connected.
[0091] Within the preferred embodiment of the invention, it will be sufficient to use 4 different sizes and diameters of pins for all needs in the production of firearms. Within this application, it will be sufficient to change only 6 pins (4.4) and the fastening blocks (4.1, 4.2) where they are mounted to fatigue the different springs (11).
[0092] Factors such as the difference in length between Lo and L2-L1 determine which pin (4.4) will be used for the spring (11) to be fatigued. The classification herein is adjusted and grouped according to the spring (11) in the various structures used.
[0093] According to this embodiment, when the user wants to use the apparatus for a different spring (11), they can lift the fastening block (4) upwards by pulling the adjustment removal pins (14) back. In this way, the connection projections (4.3) of the fastening blocks (4.1,4.2) move in the connection grooves (12) and get rid of the locking place. With this process, the fastening block (4) can be separated from the apparatus body (1). By doing the opposite of this movement, the fastening block (4) can be connected to the apparatus body (1).
Claims
CLAIMS1. A universal spring fatigue apparatus, comprising at least one apparatus body (1) equipped with at least one tensioning element (2) associated with it in order to tension at least one spring (11) and used to perform all of the spring fatigue tests of different spring types used in firearms, characterized in that it comprises at least one fastening block (4) which can be removably connected to the apparatus body (1) or to one or more of the parts associated therewith, which can be used for fatiguing springs (11) of different qualities, and which comprises connection areas in its structure in which at least one spring (11) can be positioned.
2. A spring fatigue apparatus according to claim 1, characterized in that in order for the springs (11) of different structures to be subjected to fatigue test, ready-made fastening apparatuses (4) of different structures prepared in advance can be used, as well as fastening blocks (4) that may be suitable for different springs (11) can be formed by disassembling and assembling and / or adjusting the lower parts of the apparatus relative to each other.
3. The spring fatigue apparatus according to claim 1, characterized in that it comprises a fastening block (4) removably connectable between at least one fixed support part (8) and at least one movable support part (9).
4. The spring fatigue apparatus according to claim 3, characterized in that it comprises a fixed support part (9) associated with the L2 adjustment element (10) by means of at least one transmission element (3).
5. The spring fatigue apparatus according to claim 4, characterized in that it comprises the L2 adjustment element (10) equipped with an adjustment indicator showing the L2 value of the spring to be fatigued.
6. The spring fatigue apparatus according to claim 3, characterized in that it comprises a fixed support part (8) associated with at least one LI adjustment element (5).
7. The spring fatigue apparatus according to claim 6, characterized in that it comprises a fixed support part (8) positioned in a movement track (7), the periphery of which is provided with an adjustment element indicator (6).
8. The spring fatigue apparatus according to claim 1, characterized in that it comprises a fastening block (4) having at least one movable fastening block (4.1) and at least one fixed fastening block (4.2) arranged opposite each other, between which at least one pin (4.4) is formed.
9. The spring fatigue apparatus according to claim 8, characterized in that it comprises pins (4.4) for carrying the springs (11) intended to be connected to the pin slots (4.5) formed on the movable fastening block (4.1) and the fixed fastening block (4.2).
10. The spring fatigue apparatus according to claim 8 or 9, characterized in that it comprises the following:• pins (4.4), the end on the side of the fixed fixing block (4.2) being hollowed so that they can be immobilized in the pin slots (4.5) formed in this section, and• the end on the other side being tapered.
11. The spring fatigue apparatus according to claim 8 or 9, characterized in that the movable fastening block (4.1) and the back of the fixed fastening block (4.2) are provided with at least one connection projection (4.3).
12. The spring fatigue apparatus according to claim 11, characterized in that it comprises connection projections (4.3) that are intended to be placed in the connection groove(s) (12).
13. The spring fatigue apparatus according to claim 11 or 12, characterized in that it comprises the following:• a connection projection (4.3) designed as a T-section part, and• a connection groove (12) configured as a T-section channel.
14. The spring fatigue apparatus according to any one of the preceding claims, characterized in that at least one of the parts (8, 9) is provided with the adjustmentremoval pin (14) so that the parts of the fastening block (4) can be removed and attached to the fixed support part (8) and the movable support part (9).
15. The spring fatigue apparatus according to claim 14, characterized in that it comprises an adjustment removal pin (14) operable in the adjustment removal pin slot (13).
16. The spring fatigue apparatus according to claim 14, characterized in that both the fixed support part (8) and the movable support part (9) are also provided with an adjustment removal pin (14).
17. The spring fatigue apparatus according to claim 6, characterized in that it comprises the LI adjustment element (5) designed in the form of a rotatable arm.
18. The spring fatigue apparatus according to claim 17, characterized in that it comprises the LI adjustment element (5) designed in the form of an arm that can directly push the moving body (15) forward.