A PUSHER COMPONENT PROVIDING ADDITIONAL FORCE TO OIL AND GAS

PRESSURE IN SHOCK ABSORBERS

The Related Art The invention relates to shock absorber used in passenger and driver seats in public transportation vehicles and relates to an embodiment, which provides problem free locking of the valve inside the piston, and in which a mechanical force support is made in addition to oil and gas pressure via a pusher component (spring). The present invention relates to shock absorbers providing movement of the backrest surface of vehicle seats comprising a valve body positioned inside the pressure chamber and an on-off pin providing directing of the valve body from outside by being connected to that valve body, and in order to bring additional force to oil pressure for movement of the valve body, which is positioned in the said pressure chamber, and which is moved on the x-axis with the impact of oil pressure, the invention relates to at least one pusher component, which is positioned at the said pressure chamber, and which applies pushing force to valve body on the x-axis line together with the oil pressure.

Background of the Invention As known, shock absorbers are supportive members having wide areas of usage and used in many sectors. The shock absorber of the invention; relates to shock absorbers, which are adapted to the backrest area used as reclining surface at the vehicle seats, and which ensure movement of the backrest area. These seats commonly used in passenger and driver seats in public transportation vehicles in the prior art are the type, back part of which can be adjusted for comfort and passenger satisfaction. These seats have a structure, which can be fixed at the desired position, operate via latch, and have lockable property. However, these shock absorbers do not have the desired performance and usage quality.

In the shock absorber embodiment used in the prior art and adapted to the backrest surface of the vehicle seat and providing movement of the backrest surface; when the passenger reclines the backrest surface of the seat by leaning back and then brings the backrest back to its normal position, the shock absorber which has lost its functionality before the end of its expected life and its statue of limitation can not bring the backrest to the normal position with the desired rate or force. Even most of the time, passengers bring the reclining surface to the normal position by manually intervening. However, the backrest surface has to be brought to the normal position via oil and gas pressure without the need of intervention of the passenger. This situation forms an undesired situation in shock absorbers.

A few applications are encountered in the patent research made about vehicle seat shock absorbers. Among these applications; in the patent application of VITRA PATENTE AG with no EP1468633; a shock absorber having a sealed chamber is found and a cylinder structure surrounding the said chamber moves inside the cylinder via a piston in the vertical axis. In the movement direction of the shock absorber, in the position of the piston and an exit position, movable seat and rear seat have a vertical reclining position. Another patent application is the application of the FU LUONG HI TECH CO LTD Company with no TW265250 (B). In the abstract part of this application, the invention comprises a source having an external cylinder tube, and a gas of an internal cylinder unit of a piston unit. A control device forms the internal cylinder unit inside. The place on which the internal cylinder would be fitted has a cylinder wall. A channel and the cylinder wall have a face which is added to the external cylinder tube. By the combination found between the internal cylinder fitting place and the guide joint formed, the guide joint is easily formed for facilitating operation. Description of the Invention

The purpose of the invention is to provide a shock absorber bringing a different novelty and having different technical properties than the shock absorber embodiments used in the prior art. A purpose of the invention is to place a pusher component (spring) as additional support force to gas and oil pressure in order to provide problem free locking of the valve found inside the piston. The purpose is to provide a stronger locking by obtaining superior force and performance via the pusher component.

Another purpose of the invention is to provide more sound operation of the transfer mechanisms (brake wire mechanisms and plastic accessories), which actuate the shock absorber locking pin found at the seat to which the shock absorber is connected, against friction and tacking with regards to embodiments used in the prior art.

Another purpose of the invention is to; also extend the expected life of the valve by increasing the tightness ratio of the o-ring, which is the impermeability member between the valve and the piston.

Another purpose of the invention is to ensure the spring, which is placed as additional support force to gas and oil pressure, be used for long time and even have much more long expected life than the expected life of the shock absorber. As a result, it contributes to problem free and longer operation of the system.

In order to achieve the above said purposes, the present invention relates to shock absorbers providing movement of the backrest surface of vehicle seats comprising a valve body positioned inside the pressure chamber and an on-off pin providing directing of the valve body from outside by being connected to that valve body, and in order to bring additional support force to oil pressure for movement of the valve body, which is positioned in the said pressure chamber, and which is moved linearly on the x-axis with the impact of oil pressure, the invention comprises at least one pusher component, which is positioned at the said pressure chamber, and which applies pushing force to valve body on the x-axis line together with the oil pressure.

Figures for Better Understanding of the Invention

Figure-1 ; is the two dimensional complete side view according to the external appearance of the shock absorber, which is the subject of the invention.

Figure-2; is the two dimensional complete side section view according to the external appearance of the shock absorber, which is the subject of the invention. Figure-3; is the close plan section view of the spring, which is positioned in the piston as additional support force to the valve, and the relevant parts of the shock absorber, which is the subject of the invention.

Parts Numbers 10- Shock absorber

11- On-off pin

12- Shock absorber shaft

13- Impermeability o-ring

14- Valve connection upper nut 15-Valve connection upper washer

16- Valve connection lower washer

17- Valve connection lower nut 18- Pusher component

19- Fixing washer 19.1- Internal hole

20- Valve body 21 - Impermeability component

22- Outer cylinder

23- Outer cylinder pressure chamber

23.1 Piston internal rear chamber

23.2 Piston internal front chamber 23.3 Outer cylinder front chamber

23.4 Outer cylinder rear chamber

24- Valve mechanism

25- Piston body

26- Oil hole

Detailed Description of the Invention

In this detailed description, the preferred embodiments of the shock absorber (10), which is the subject of the invention, are only described for better understanding of the subject without forming any limiting affect. The invention relates to shock absorbers (10) providing movement of the backrest surface of vehicle seats comprising a piston body (25) positioned inside the outer cylinder pressure chamber (23) and a valve body (20) positioned inside this piston body (25) and an on-off pin (11) providing directing of the valve body (20) from outside by being connected to that valve body (20) and a shock absorber shaft (12) on which this pin (11) is embedded, an outer cylinder (22) in which the piston body (25) is positioned, impermeability o-ring (13), and impermeability component (21), and in order to bring additional support force to oil pressure for movement of the valve body (20), which is positioned in the piston body (25) that is positioned in the said outer cylinder pressure chamber (23), and to which is moved linearly on the x- axis with the impact of oil pressure; the invention comprises at least one pusher component (18), which is positioned inside the piston internal rear chambers (23.1), and which applies pushing force to valve body (20) on the x-axis line together with the oil pressure.

The said pusher component (18) is a spring. It comprises a fixing washer ( 9), which performs the task of a retaining surface for the said pusher component (18), and comprises valve connection upper and lower washers (15,16) which are connected with the on-off pin (11) and valve connection upper and lower nuts (14,17) which are connected with the on-off pin (11) and positioned in the valve body (20).

Additional force is provided to oil pressure via pusher component (18) adapted to the system and thus operation of the valve body (20) on the x-axis is ensured for long time. The spring, or in other words, the pusher component (18) used here has characteristics durable for long usage periods. One end of the pusher component (18) positioned inside the piston internal rear chambers (23.1) is leaned against the fixing washer (19) performing retaining task. And its other end is leaned against the valve connection lower washer (16). The spring used between these two volumes facilitates the linear movement of valve body (20) on the x-axis by continuously making pressure on the valve connection lower washer (16). A structure performing the same task can be obtained by using pull spring preferably at the piston internal front chamber (23.2) region. That is to say, it is also possible to position the pull spring providing a second additional force to the oil force in the piston internal front chamber (23.2).

The way of operation of the shock absorber (10) is as follows: when pushing force is applied in the x-axis line on the locking or on-off pin (1 1 ) embedded with the shock absorber shaft (12), since the shock absorber shaft (12) is integral with the mechanism (24) inside the outer cylinder (22) as seen from the outside of the shock absorber, pressure is applied on the mechanism (24) in the x-axis towards inside the outer cylinder (22) and the pressurized oil found inside the outer cylinder rear chamber (23.4) passes to the outer cylinder front chamber (23.3) and thus oil transfer is accomplished and the mechanism (24) changes its position. The oil passage transfer in the valve mechanism (24) is accomplished in this way (See figure-4).

The shock absorber pipe, or in other words, the mechanism (24) found inside the outer cylinder (22) applies pressure on the pressurized oil piston internal rear chamber (23.1) on x-axis direction, and since the on-off pin (1 1 ) and spring group mechanism (24) found in the piston body (25) are under pressure at this moment on x-axis direction, the oil hole (26) is in open position, the pressurized oil passes through the internal hole (19.1 ) of the fixing washer (19) from the outer cylinder rear chamber (23.4) and gets into the rear chamber (23.1 ) found inside the piston, and then it is transferred to the front chamber (23.2) found inside the piston by being transferred through the oil passage channels of valve connection washers (16). From here, passes through the oil hole (26) and the transfer operation is accomplished by getting into the shock absorber outer cylinder front chamber (23.3). During operation of the shock absorber in opposite direction, oil transfer is made in opposite way and the operation is accomplished with the same performance.

The protection scope of this application has been specified under claims and cannot be limited to the descriptions only given as sampling above. It is obvious that a person skilled in the related art can apply the innovation disclosed by this invention into similar purposed other areas by means of changing the parts in form and/or using similar structures. Therefore, it is also clear that such embodiments lack of novelty and inventive step criteria.